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    "textoCompleto" => "<span class="elsevierStyleSections"><span id="sec0005" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="sect0025">Background</span><p id="par0005" class="elsevierStylePara elsevierViewall">The present document emerged from the scientific societies that signed it as a set of evidence-based consensus recommendations on the use of natriuretic peptides &#40;NPs&#41; in heart failure &#40;HF&#41;&#46; The document&#39;s objective is to improve the medical care of patients with HF and to more efficiently use resources in healthcare activities&#46;</p><p id="par0010" class="elsevierStylePara elsevierViewall">NPs have become a laboratory tool with significant implications in the diagnosis&#44; prognosis and treatment of patients with suspected or confirmed HF&#46; The use of NPs affects various healthcare settings &#40;outpatient consultations&#44; emergency department&#44; hospitalization and laboratory&#41; and by various primary care and specialized professionals&#46; The proper use of NPs has implications for patients and for the healthcare system&#44; especially considering the epidemic nature of HF&#46; For this reason&#44; a scientific consensus is needed as a guide and to establish specific recommendations on the appropriate use of NPs in clinical practice&#46;</p><p id="par0015" class="elsevierStylePara elsevierViewall">Although there are various types of NPs&#44; this document focuses on those that have shown their usefulness in clinical studies&#58; B-type natriuretic peptides and related metabolites&#46;</p></span><span id="sec0010" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="sect0030">Current situation in Spain</span><p id="par0020" class="elsevierStylePara elsevierViewall">The current recommendations on the use of NPs in clinical practice are based on international guidelines from scientific societies&#46; NPs are included in the diagnostic algorithm for patients with HF in the 2001 clinical practice guidelines&#46;<a class="elsevierStyleCrossRef" href="#bib0185"><span class="elsevierStyleSup">1</span></a> Reference values for the diagnosis of acute HF were first published in 2005&#46;<a class="elsevierStyleCrossRef" href="#bib0190"><span class="elsevierStyleSup">2</span></a> Since then&#44; the incorporation of NPs in subsequent clinical practice guidelines has been progressive&#46; The most recent guidelines of 2012 and 2013 published for the first time the reference concentrations for use in the outpatient and emergency diagnosis&#46; A recommendation of IA was established for the use of NPs in the diagnosis and prognostic assessment of patients&#46;<a class="elsevierStyleCrossRefs" href="#bib0195"><span class="elsevierStyleSup">3&#44;4</span></a> Therefore&#44; more than 10 years were needed for its definitive incorporation into the guidelines of scientific societies&#46;</p><p id="par0025" class="elsevierStylePara elsevierViewall">In healthcare practice&#44; the incorporation of NPs has been even slower and with significant disparity&#44; which&#44; although it has been improving&#44; does not reflect the guidelines&#8217; current recommendations&#46; In fact&#44; in a survey by the Spanish Society of Cardiology conducted in January 2015 among 107 public hospitals covering a treated population of more than 31 million inhabitants&#44; the emergency reading of NPs was available in 65&#37; of the emergency departments &#40;which would equal only 66&#37; of the population treated by this set of departments&#41;&#46;<a class="elsevierStyleCrossRef" href="#bib0205"><span class="elsevierStyleSup">5</span></a> In a survey of 96 emergency departments a year earlier&#44; the Spanish Society of Emergency Medicine reported that 59&#37; of centers had NPs&#46;<a class="elsevierStyleCrossRef" href="#bib0210"><span class="elsevierStyleSup">6</span></a></p></span><span id="sec0015" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="sect0035">Definitions and prior knowledge</span><p id="par0030" class="elsevierStylePara elsevierViewall">An appropriate use and interpretation of NPs in clinical practice is possible only if the physician has knowledge of its pathophysiology and measurement methodology&#46; The items related to their pathophysiology and methodology are listed below&#46; Their reading and understanding are required for any physician who seeks to interpret NP concentrations in their patients&#46;</p><span id="sec0020" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="sect0040">A&#46; Pathophysiology</span><p id="par0035" class="elsevierStylePara elsevierViewall"><ul class="elsevierStyleList" id="lis0005"><li class="elsevierStyleListItem" id="lsti0005"><span class="elsevierStyleLabel">1&#46;</span><p id="par0040" class="elsevierStylePara elsevierViewall">NPs are bioactive peptides with numerous biological effects&#46;<a class="elsevierStyleCrossRef" href="#bib0215"><span class="elsevierStyleSup">7</span></a> There are 3 families of NPs&#58; ANPs &#40;type A&#44; atrial NPs&#41;&#44; BNPs &#40;type B&#44; brain NPs&#41; and CNPs &#40;C-type NPs&#41;&#46; A and B-type NPs have systemic effects and are produced mainly in cardiomyocytes&#46; CNPs are mainly produced in endothelial cells and act as an autocrine and paracrine factor&#46;</p></li><li class="elsevierStyleListItem" id="lsti0010"><span class="elsevierStyleLabel">2&#46;</span><p id="par0045" class="elsevierStylePara elsevierViewall">The effects of NPs are mediated by its binding to 3 types of receptors&#44; 2 of which are functional and 1 of which is clearing&#46;<a class="elsevierStyleCrossRef" href="#bib0220"><span class="elsevierStyleSup">8</span></a> The 2 functional receptors &#40;natriuretic peptide receptor &#91;NPR&#93;&#41; have been characterized as A-type &#40;NPR-A&#41; and B-type &#40;NPR-B&#41; and are expressed in the cardiovascular system and numerous organs &#40;lungs&#44; kidneys&#44; skin and brain&#41;&#46; Binding to these receptors stimulates the production of cyclic guanosine-monophosphate &#40;cGMP&#41;&#46;</p></li><li class="elsevierStyleListItem" id="lsti0015"><span class="elsevierStyleLabel">3&#46;</span><p id="par0050" class="elsevierStylePara elsevierViewall">NPs are antagonists of the renin-angiotensin-aldosterone system&#46; Their main actions are reducing peripheral vascular resistance and increasing natriuresis and diuresis&#46; The antifibrotic and antihypertrophic effects of NPs in the myocardium have recently been identified&#46;</p></li><li class="elsevierStyleListItem" id="lsti0020"><span class="elsevierStyleLabel">4&#46;</span><p id="par0055" class="elsevierStylePara elsevierViewall">B-type NPs are of greatest interest due to their proven clinical utility&#46; The responsible gene is located in chromosome 1&#46; The molecule is synthesized as a preprohormone &#40;pre-proBNP&#41;&#44; which undergoes cleavage of a signal peptide for conversion into the prohormone &#40;proBNP&#41;&#46; Most of the proBNP is then cleaved intracellularly or during its secretion to the circulation&#44; resulting in the amino-terminal portion of the proBNP &#40;NT-proBNP&#41; and in the BNP &#40;<a class="elsevierStyleCrossRef" href="#fig0005">Fig&#46; 1</a>&#41;&#46;</p><elsevierMultimedia ident="fig0005"></elsevierMultimedia></li><li class="elsevierStyleListItem" id="lsti0025"><span class="elsevierStyleLabel">5&#46;</span><p id="par0060" class="elsevierStylePara elsevierViewall">There are 3 major forms of B-type NPs in the circulation&#58; The biologically inactive NT-proBNP of 76 amino acids&#59; the biologically active BNP of 32 amino acids&#59; and the compound precursor&#44; proBNP&#44; of 108 amino acids&#44; whose biological activity is approximately 10&#37; that of the BNP&#46; Truncated fragments and modified forms of the 3 B-type NPs have also been detected&#46;</p></li><li class="elsevierStyleListItem" id="lsti0030"><span class="elsevierStyleLabel">6&#46;</span><p id="par0065" class="elsevierStylePara elsevierViewall">B-type NPs are produced in atria and ventricles&#46; The left ventricle is the main source&#44; but production by the atria is significant&#46;</p></li><li class="elsevierStyleListItem" id="lsti0035"><span class="elsevierStyleLabel">7&#46;</span><p id="par0070" class="elsevierStylePara elsevierViewall">The production of B-type NPs &#40;<a class="elsevierStyleCrossRef" href="#fig0005">Fig&#46; 1</a>&#41; is governed mechanically and proportionally to the increase in tension in the cardiomyocytes&#46; Their synthesis is rapid after the stimulation&#44; with no significant intracellular deposits&#46; After synthesis&#44; the BNPs are secreted into the circulation&#46; Myocardial damage also entails their secretion&#46; In practice&#44; HF is the main cause &#40;although not the only one&#41; of increased concentrations of circulating NPs&#46; This increase occurs in the presence of both systolic and diastolic dysfunction&#46;</p></li><li class="elsevierStyleListItem" id="lsti0040"><span class="elsevierStyleLabel">8&#46;</span><p id="par0075" class="elsevierStylePara elsevierViewall">Although the release of BNP and NT-proBNP is equimolecular&#44; their half-lives are different&#46; The half-lives of BNP and NT-proBNP are 21<span class="elsevierStyleHsp" style=""></span>min and approximately 70<span class="elsevierStyleHsp" style=""></span>min&#44; respectively&#46; NT-proBNP concentrations are therefore greater than those of BNP&#46;</p></li><li class="elsevierStyleListItem" id="lsti0045"><span class="elsevierStyleLabel">9&#46;</span><p id="par0080" class="elsevierStylePara elsevierViewall">The clearance of circulating BNP is produced actively by its binding to the natriuretic peptide receptor C &#40;NPR-C&#41; and by the action of neprilysin&#46; Neprilysin is a membrane neutral endopeptidase&#44; which degrades the existing ring structure in BNP&#44; proBNP and pre-proBNP but not in NT-proBNP and causes proteolysis of these molecules&#46; In conditions of homeostasis&#44; clearance through binding to NPR-C predominates&#46; In volume overload or pressure conditions &#40;<span class="elsevierStyleItalic">e&#46;g&#46;</span>&#44; in HF&#41;&#44; clearance by neprilysin predominates &#40;<a class="elsevierStyleCrossRef" href="#fig0005">Fig&#46; 1</a>&#41;&#46;</p></li></ul></p></span><span id="sec0025" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="sect0045">B&#46; Biochemistry and measurement methods</span><p id="par0085" class="elsevierStylePara elsevierViewall"><ul class="elsevierStyleList" id="lis0010"><li class="elsevierStyleListItem" id="lsti0050"><span class="elsevierStyleLabel">1&#46;</span><p id="par0090" class="elsevierStylePara elsevierViewall">There are immunoassays for measuring the various A-type NPs &#40;ANP&#44; NT-proANP&#44; MR-proANP&#41; and B-type NPs &#40;BNP&#44; NT-proBNP&#44; proBNP&#41;&#46; The immunoassays can be totally automated or partially manual such as the point-of-care methods&#46; <a class="elsevierStyleCrossRefs" href="#tbl0005">Tables 1 and 2</a> show the main characteristics of the methods available for measuring BNP and NT-proBNP&#46;</p><elsevierMultimedia ident="tbl0005"></elsevierMultimedia><elsevierMultimedia ident="tbl0010"></elsevierMultimedia></li><li class="elsevierStyleListItem" id="lsti0055"><span class="elsevierStyleLabel">2&#46;</span><p id="par0095" class="elsevierStylePara elsevierViewall">The existing immunoassays for measuring BNP use antibodies that recognize not only circulating BNP but also variably recognize BNP fragments and proBNP&#46; This situation creates significant differences among the various immunoassays and hinders the comparison of values between the immunoassays &#40;<a class="elsevierStyleCrossRef" href="#tbl0005">Table 1</a>&#41;&#46;</p></li><li class="elsevierStyleListItem" id="lsti0060"><span class="elsevierStyleLabel">3&#46;</span><p id="par0100" class="elsevierStylePara elsevierViewall">The existing immunoassays for measuring NT-proBNP use the same or similar antibodies and mostly detect NT-proBNP and residually detect proBNP &#40;<a class="elsevierStyleCrossRef" href="#tbl0010">Table 2</a>&#41;&#46;</p></li><li class="elsevierStyleListItem" id="lsti0065"><span class="elsevierStyleLabel">4&#46;</span><p id="par0105" class="elsevierStylePara elsevierViewall">Due to the fact that the immunoassays detect molecular forms of BNP and NT-proBNP with different molecular weights&#44; their concentrations cannot be expressed in molar units &#40;<span class="elsevierStyleItalic">e&#46;g&#46;</span>&#44; mmol&#47;L&#41;&#46; The common unit for expressing their concentration is pg&#47;mL &#40;equivalent to ng&#47;L&#41;&#46;</p></li><li class="elsevierStyleListItem" id="lsti0070"><span class="elsevierStyleLabel">5&#46;</span><p id="par0110" class="elsevierStylePara elsevierViewall">Immunoassays for measuring BNP and NT-proBNP have low analytical variability&#44; which is greater in the point-of-care type than in the automated type&#46; This low variability helps detect differences between successive measurements attributable to changes in the clinical condition and not to analytical variability&#46;<a class="elsevierStyleCrossRef" href="#bib0225"><span class="elsevierStyleSup">9</span></a></p></li><li class="elsevierStyleListItem" id="lsti0075"><span class="elsevierStyleLabel">6&#46;</span><p id="par0115" class="elsevierStylePara elsevierViewall">Circulating concentrations of B-type NPs have biological variability in healthy individuals and in stable patients&#46; This variability is greater for BNP than for NT-proBNP and increases as the serial interval and NP concentration decrease&#46; For example&#44; for weekly measurements in patients with stable HF&#44; the biological variability can reach 50&#37; for BNP and 25&#37; for NT-proBNP&#46;<a class="elsevierStyleCrossRef" href="#bib0230"><span class="elsevierStyleSup">10</span></a></p></li><li class="elsevierStyleListItem" id="lsti0080"><span class="elsevierStyleLabel">7&#46;</span><p id="par0120" class="elsevierStylePara elsevierViewall">The BNP and NT-proBNP concentrations increase with age and are higher in women than in men&#46; Reference values stratified by age have been published for both NPs&#46; Obesity decreases the concentrations of BNP and NT-proBNP&#46;<a class="elsevierStyleCrossRef" href="#bib0225"><span class="elsevierStyleSup">9</span></a></p></li><li class="elsevierStyleListItem" id="lsti0085"><span class="elsevierStyleLabel">8&#46;</span><p id="par0125" class="elsevierStylePara elsevierViewall">There are extracardiac causes for the increase in circulating concentrations of B-type NPs&#44; either through cardiac stress or an increase in circulating blood volume&#44; which should be interpreted in each clinical context&#46; Among them&#44; renal failure and pulmonary hypertension are the most clinically relevant&#46;<a class="elsevierStyleCrossRef" href="#bib0235"><span class="elsevierStyleSup">11</span></a></p></li><li class="elsevierStyleListItem" id="lsti0090"><span class="elsevierStyleLabel">9&#46;</span><p id="par0130" class="elsevierStylePara elsevierViewall">BNP and NT-proBNP concentrations are increased in renal dysfunction and are higher the more severe the dysfunction&#46; The use of reference values stratified by age minimizes the effect of renal dysfunction on NT-proBNPvalues&#46;<a class="elsevierStyleCrossRef" href="#bib0240"><span class="elsevierStyleSup">12</span></a></p></li><li class="elsevierStyleListItem" id="lsti0095"><span class="elsevierStyleLabel">10&#46;</span><p id="par0135" class="elsevierStylePara elsevierViewall">When interpreting NP concentrations&#44; clinicians should consider the effect of particular drugs &#40;currently&#44; neprilysin inhibitors and recombinant BNP&#41; on the concentrations&#46;</p></li></ul></p></span></span><span id="sec0030" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="sect0050">Recommendations for using B-type NPs</span><p id="par0140" class="elsevierStylePara elsevierViewall">As general criteria for the use of NPs in the various clinical scenarios&#44; the recommendations are as follows&#58;<ul class="elsevierStyleList" id="lis0015"><li class="elsevierStyleListItem" id="lsti0100"><span class="elsevierStyleLabel">-</span><p id="par0145" class="elsevierStylePara elsevierViewall">Prior training in prelaboratory &#40;pathophysiology&#41;&#44; laboratory &#40;methods&#41; and postlaboratory &#40;interpretation and integration with the symptoms&#41; terms&#46;</p></li><li class="elsevierStyleListItem" id="lsti0105"><span class="elsevierStyleLabel">-</span><p id="par0150" class="elsevierStylePara elsevierViewall">Reasoned use based on the expected usefulness for improving decision making&#44; the diagnosis or the treatment of patients&#46;</p></li><li class="elsevierStyleListItem" id="lsti0110"><span class="elsevierStyleLabel">-</span><p id="par0155" class="elsevierStylePara elsevierViewall">Use of consensus protocols&#44; in which all departments involved in the use of NPs should participate&#46;</p></li></ul></p><span id="sec0035" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="sect0055">A&#46; Diagnosis</span><p id="par0160" class="elsevierStylePara elsevierViewall">The measurement of NPs for diagnostic purposes represents the main clinical application&#44; the most extensively studied application and the one with the most scientific evidence&#46;<a class="elsevierStyleCrossRefs" href="#bib0195"><span class="elsevierStyleSup">3&#44;4</span></a></p><p id="par0165" class="elsevierStylePara elsevierViewall">The following general recommendations have been established &#40;<a class="elsevierStyleCrossRef" href="#tbl0015">Table 3</a>&#41;&#58;<ul class="elsevierStyleList" id="lis0020"><li class="elsevierStyleListItem" id="lsti0115"><span class="elsevierStyleLabel">-</span><p id="par0170" class="elsevierStylePara elsevierViewall">Their measurement coupled with clinical judgment improves diagnostic accuracy compared with clinical diagnosis alone&#44; particularly in cases of uncertainty&#46;<a class="elsevierStyleCrossRefs" href="#bib0245"><span class="elsevierStyleSup">13&#8211;15</span></a></p></li><li class="elsevierStyleListItem" id="lsti0120"><span class="elsevierStyleLabel">-</span><p id="par0175" class="elsevierStylePara elsevierViewall">Their usefulness in the diagnosis has been studied in patients in whom dyspnea is the main symptom&#46;<a class="elsevierStyleCrossRefs" href="#bib0240"><span class="elsevierStyleSup">12&#44;16</span></a></p></li><li class="elsevierStyleListItem" id="lsti0125"><span class="elsevierStyleLabel">-</span><p id="par0180" class="elsevierStylePara elsevierViewall">Their usefulness is mainly a result of their high negative predictive value for excluding HF&#44; especially in patients with no prior diagnosis&#46;<a class="elsevierStyleCrossRefs" href="#bib0265"><span class="elsevierStyleSup">17&#44;18</span></a></p></li></ul></p><elsevierMultimedia ident="tbl0015"></elsevierMultimedia><p id="par0185" class="elsevierStylePara elsevierViewall">The diagnostic use of NPs in 2 settings &#40;emergency department or hospital setting and the outpatient or doctor&#39;s office setting&#41; is discussed below&#46;</p><p id="par0190" class="elsevierStylePara elsevierViewall"><span class="elsevierStyleItalic">A&#46;1&#46;</span> The measurement of B-type NP concentrations should be performed for all patients who go to the emergency department for dyspnea and for those with suspected <span class="elsevierStyleItalic">de novo</span> HF &#40;with no prior established diagnosis&#41;&#46;<ul class="elsevierStyleList" id="lis0025"><li class="elsevierStyleListItem" id="lsti0130"><span class="elsevierStyleLabel">-</span><p id="par0195" class="elsevierStylePara elsevierViewall">The use of B-type NPs has been shown to be cost-effective in this scenario and to have an effect on patient diagnosis and treatment&#46;<a class="elsevierStyleCrossRef" href="#bib0275"><span class="elsevierStyleSup">19</span></a></p></li><li class="elsevierStyleListItem" id="lsti0135"><span class="elsevierStyleLabel">-</span><p id="par0200" class="elsevierStylePara elsevierViewall">Their usefulness is greater in conditions of clinical uncertainty&#44; prior to the initial assessment that has to include the case history&#44; physical examination&#44; electrocardiogram and chest radiology&#46;<a class="elsevierStyleCrossRefs" href="#bib0280"><span class="elsevierStyleSup">20&#44;21</span></a></p></li><li class="elsevierStyleListItem" id="lsti0140"><span class="elsevierStyleLabel">-</span><p id="par0205" class="elsevierStylePara elsevierViewall">Their measurement should be performed with the patient&#39;s first blood sample upon their arrival at the emergency department&#46; The early availability of results facilitates a better diagnosis and treatment&#46;</p></li><li class="elsevierStyleListItem" id="lsti0145"><span class="elsevierStyleLabel">-</span><p id="par0210" class="elsevierStylePara elsevierViewall">A low value &#40;NT-proBNP<span class="elsevierStyleHsp" style=""></span>&#60;300<span class="elsevierStyleHsp" style=""></span>pg&#47;mL or BNP<span class="elsevierStyleHsp" style=""></span>&#60;100<span class="elsevierStyleHsp" style=""></span>pg&#47;mL&#41; helps rule out the presence of HF regardless of age&#44; with a negative predictive value of 98&#37; for NT-proBNP and 90&#37; for BNP&#46;<a class="elsevierStyleCrossRefs" href="#bib0240"><span class="elsevierStyleSup">12&#44;13&#44;16&#44;22</span></a></p></li><li class="elsevierStyleListItem" id="lsti0150"><span class="elsevierStyleLabel">-</span><p id="par0215" class="elsevierStylePara elsevierViewall">For NT-proBNP&#44; the use of age-adjusted values helps improve the ability to identify the presence of HF&#58; &#62;450<span class="elsevierStyleHsp" style=""></span>pg&#47;mL &#40;&#60;50 years&#41;&#44; &#62;900<span class="elsevierStyleHsp" style=""></span>pg&#47;mL &#40;50&#8211;75 years&#41; and &#62;1800<span class="elsevierStyleHsp" style=""></span>pg&#47;mL &#40;&#62;75 years&#41;&#46;<a class="elsevierStyleCrossRefs" href="#bib0240"><span class="elsevierStyleSup">12&#44;23</span></a> Overall&#44; the positive predictive value of these values is 88&#37;&#46;<a class="elsevierStyleCrossRef" href="#bib0240"><span class="elsevierStyleSup">12</span></a></p></li><li class="elsevierStyleListItem" id="lsti0155"><span class="elsevierStyleLabel">-</span><p id="par0220" class="elsevierStylePara elsevierViewall">A high BNP value &#40;&#62;400<span class="elsevierStyleHsp" style=""></span>pg&#47;mL&#41;&#44; regardless of age&#44; should lead clinicians to consider the diagnosis of HF as probable&#44; with a positive predictive value of 86&#37;&#46;<a class="elsevierStyleCrossRef" href="#bib0290"><span class="elsevierStyleSup">22</span></a></p></li><li class="elsevierStyleListItem" id="lsti0160"><span class="elsevierStyleLabel">-</span><p id="par0225" class="elsevierStylePara elsevierViewall">To interpret intermediate values of NT-proBNP or BNP&#44; the clinical judgment for the likelihood of HF should predominate&#44; taking into consideration other conditions that could influence the concentrations of both peptides&#46;</p></li><li class="elsevierStyleListItem" id="lsti0165"><span class="elsevierStyleLabel">-</span><p id="par0230" class="elsevierStylePara elsevierViewall">For patients who already have a prior diagnosis of HF&#44; NPs should not be routinely measured on arrival at the emergency department or during hospitalization&#46; Nevertheless&#44; their measurement should be considered for patients who have a prior reading in a stable clinical condition &#40;outpatient or at the time of discharge for a prior decompensation&#41; and for whom there are questions about current acute decompensation of the HF&#46; Only in these cases&#44; individually and within a scenario of diagnostic uncertainty as to the role of HF in the current event&#44; is their measurement recommended&#46;</p></li></ul></p><p id="par0235" class="elsevierStylePara elsevierViewall"><span class="elsevierStyleItalic">A&#46;2&#46;</span> The measurement of NP concentrations should be accessible in outpatient consultations at the physician&#39;s discretion for patients with clinically suspected <span class="elsevierStyleItalic">de novo</span> HF &#40;with no prior established diagnosis&#41;&#46; This criterion should take in account the following&#58;<ul class="elsevierStyleList" id="lis0030"><li class="elsevierStyleListItem" id="lsti0170"><span class="elsevierStyleLabel">-</span><p id="par0240" class="elsevierStylePara elsevierViewall">NP measurements should be requested for patients with diagnostic uncertainty&#44; after the initial clinical assessment&#46;<a class="elsevierStyleCrossRef" href="#bib0300"><span class="elsevierStyleSup">24</span></a></p></li><li class="elsevierStyleListItem" id="lsti0175"><span class="elsevierStyleLabel">-</span><p id="par0245" class="elsevierStylePara elsevierViewall">It is recommended that the result be made available&#44; ideally&#44; within 48<span class="elsevierStyleHsp" style=""></span>h of obtaining the sample&#46;</p></li><li class="elsevierStyleListItem" id="lsti0180"><span class="elsevierStyleLabel">-</span><p id="par0250" class="elsevierStylePara elsevierViewall">The result should provide data for ruling out HF&#44; with reference values of 125<span class="elsevierStyleHsp" style=""></span>pg&#47;mL &#40;NT-proBNP&#41; and 35<span class="elsevierStyleHsp" style=""></span>pg&#47;mL &#40;BNP&#41;&#46; Lower concentrations have a negative predictive value of 96&#8211;99&#37;&#46;<a class="elsevierStyleCrossRefs" href="#bib0255"><span class="elsevierStyleSup">15&#44;25</span></a></p></li><li class="elsevierStyleListItem" id="lsti0185"><span class="elsevierStyleLabel">-</span><p id="par0255" class="elsevierStylePara elsevierViewall">Their initial request is preferable to echocardiography &#40;due to accessibility and financial cost&#41;&#44; especially if the latter is delayed by more than 7 days&#46;</p></li><li class="elsevierStyleListItem" id="lsti0190"><span class="elsevierStyleLabel">-</span><p id="par0260" class="elsevierStylePara elsevierViewall">A value higher than the upper limit means that treatment for HF should start and that echocardiography should be performed to define the presence of heart disease</p></li></ul></p></span><span id="sec0040" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="sect0060">B&#46; Prognosis</span><p id="par0265" class="elsevierStylePara elsevierViewall">Although the prognostic utility of NPs in HF has been firmly established&#44; their use for this purpose should be tied to a number of specific conditions&#46;</p><p id="par0270" class="elsevierStylePara elsevierViewall">The following general recommendations have been established&#58;<ul class="elsevierStyleList" id="lis0035"><li class="elsevierStyleListItem" id="lsti0195"><span class="elsevierStyleLabel">-</span><p id="par0275" class="elsevierStylePara elsevierViewall">All increases in NP levels should be interpreted&#44; not only as support for the diagnosis but also as an &#8220;alarm signal&#8221; that provides short to medium-term risk information&#44; supplementing clinical judgment&#46;<a class="elsevierStyleCrossRefs" href="#bib0195"><span class="elsevierStyleSup">3&#44;4&#44;26</span></a></p></li><li class="elsevierStyleListItem" id="lsti0200"><span class="elsevierStyleLabel">-</span><p id="par0280" class="elsevierStylePara elsevierViewall">In any clinical scenario&#44; the greater the NP concentration&#44; the greater the risk of complications and poorer the clinical outcome&#46;</p></li><li class="elsevierStyleListItem" id="lsti0205"><span class="elsevierStyleLabel">-</span><p id="par0285" class="elsevierStylePara elsevierViewall">The usefulness of NPs for assessing the prognosis is mainly applied to patients with HF&#46; However&#44; it should be noted that the presence of high concentrations in other diseases&#44; as a marker of stress and cardiac damage&#44; also identifies a greater cardiovascular risk&#46;</p></li><li class="elsevierStyleListItem" id="lsti0210"><span class="elsevierStyleLabel">-</span><p id="par0290" class="elsevierStylePara elsevierViewall">The measurement of NPs as a risk assessment tool should not be performed routinely but rather as support for clinical judgment&#44; restricted to patients for whom the information provided affects the making of decisions regarding therapy&#46;</p></li></ul></p><p id="par0295" class="elsevierStylePara elsevierViewall"><span class="elsevierStyleItalic">B&#46;1&#46;</span> For patients in emergency departments or who are hospitalized&#44; the same criteria of the previous section are applicable&#46; The following conditions can also justify the use of NPs&#58;<ul class="elsevierStyleList" id="lis0040"><li class="elsevierStyleListItem" id="lsti0215"><span class="elsevierStyleLabel">-</span><p id="par0300" class="elsevierStylePara elsevierViewall">Patients with questions regarding the decision to hospitalize&#46;</p></li><li class="elsevierStyleListItem" id="lsti0220"><span class="elsevierStyleLabel">-</span><p id="par0305" class="elsevierStylePara elsevierViewall">Patients with questions concerning the degree of care and hospital unit&#46;</p></li><li class="elsevierStyleListItem" id="lsti0225"><span class="elsevierStyleLabel">-</span><p id="par0310" class="elsevierStylePara elsevierViewall">Patients with questions as to the use or withdrawal of devices or circulatory support therapies&#46;</p></li></ul></p><p id="par0315" class="elsevierStylePara elsevierViewall">The following should be considered when interpreting the results&#58;<ul class="elsevierStyleList" id="lis0045"><li class="elsevierStyleListItem" id="lsti0230"><span class="elsevierStyleLabel">-</span><p id="par0320" class="elsevierStylePara elsevierViewall">Absolute values of NT-proBNP greater than 5000<span class="elsevierStyleHsp" style=""></span>pg&#47;mL are associated with a greater risk of severe complications&#46; The higher the NP concentration&#44; the poorer the prognosis&#46;<a class="elsevierStyleCrossRefs" href="#bib0240"><span class="elsevierStyleSup">12&#44;27&#44;28</span></a></p></li><li class="elsevierStyleListItem" id="lsti0235"><span class="elsevierStyleLabel">-</span><p id="par0325" class="elsevierStylePara elsevierViewall">In the presence of very high NP concentrations but lacking signs of HF&#44; the possibility should always be considered of a severe cardiovascular stress condition not attributable to HF &#40;<span class="elsevierStyleItalic">e&#46;g&#46;</span>&#44; sepsis and pulmonary thromboembolism&#41;&#46;</p></li></ul></p><p id="par0330" class="elsevierStylePara elsevierViewall"><span class="elsevierStyleItalic">B&#46;2</span>&#46; For patients in outpatient consultations&#44; the following conditions could justify measuring NPs&#58;<ul class="elsevierStyleList" id="lis0050"><li class="elsevierStyleListItem" id="lsti0240"><span class="elsevierStyleLabel">-</span><p id="par0335" class="elsevierStylePara elsevierViewall">Patients with chronic HF with questions concerning the criteria for referral to specialists&#44; emergency department or hospitalization&#46;</p></li><li class="elsevierStyleListItem" id="lsti0245"><span class="elsevierStyleLabel">-</span><p id="par0340" class="elsevierStylePara elsevierViewall">Patients seen in advanced HF consultations for the decision-making process for therapy&#44; especially regarding the indication for heart transplantation and device implantation&#46;</p></li></ul></p><p id="par0345" class="elsevierStylePara elsevierViewall">The following should be considered when interpreting the results&#58;<ul class="elsevierStyleList" id="lis0055"><li class="elsevierStyleListItem" id="lsti0250"><span class="elsevierStyleLabel">-</span><p id="par0350" class="elsevierStylePara elsevierViewall">Values above 1000<span class="elsevierStyleHsp" style=""></span>pg&#47;mL for NT-proBNP indicate an increased risk of death or hospitalization&#46;<a class="elsevierStyleCrossRef" href="#bib0325"><span class="elsevierStyleSup">29</span></a> The increase in risk is linear&#59; the higher the concentration&#44; the higher the risk&#46;</p></li><li class="elsevierStyleListItem" id="lsti0255"><span class="elsevierStyleLabel">-</span><p id="par0355" class="elsevierStylePara elsevierViewall">Any value should be interpreted in the clinical context&#44; taking into account modifiers such as age and comorbidity&#46;</p></li></ul></p></span><span id="sec0045" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="sect0065">C&#46; Follow-up and treatment</span><p id="par0360" class="elsevierStylePara elsevierViewall">The use of NPs as a tool for guiding medical treatment has been evaluated primarily in the outpatient setting and following hospitalization&#46; The results have been conflicting&#44; although the meta-analyses suggest its usefulness for optimizing drug treatment and reducing adverse events&#46;<a class="elsevierStyleCrossRefs" href="#bib0330"><span class="elsevierStyleSup">30&#44;31</span></a></p><p id="par0365" class="elsevierStylePara elsevierViewall">The following items are proposed as general recommendations for its use as a treatment guideline&#58;<ul class="elsevierStyleList" id="lis0060"><li class="elsevierStyleListItem" id="lsti0260"><span class="elsevierStyleLabel">-</span><p id="par0370" class="elsevierStylePara elsevierViewall">The usefulness of NPs has been mainly demonstrated in patients younger than 75 years with systolic dysfunction&#46; Given that these studies were performed in HF units&#44; this use should only be considered in this context and by trained personnel&#46;<a class="elsevierStyleCrossRefs" href="#bib0330"><span class="elsevierStyleSup">30&#44;31</span></a></p></li><li class="elsevierStyleListItem" id="lsti0265"><span class="elsevierStyleLabel">-</span><p id="par0375" class="elsevierStylePara elsevierViewall">Repeated NP measurements may also be assessed in specific circumstances&#44; for decision making within protocols and as support for the clinical judgment&#46;</p></li></ul></p><p id="par0380" class="elsevierStylePara elsevierViewall">The measurement of NP concentrations should not be requested routinely as a follow-up tool and treatment guideline&#46; This use should instead be performed under specific clinical considerations and scenarios&#46;</p><p id="par0385" class="elsevierStylePara elsevierViewall"><span class="elsevierStyleItalic">C&#46;1&#46;</span> The following recommendations have been established for patients hospitalized for exacerbated HF&#58;<ul class="elsevierStyleList" id="lis0065"><li class="elsevierStyleListItem" id="lsti0270"><span class="elsevierStyleLabel">-</span><p id="par0390" class="elsevierStylePara elsevierViewall">For the serial use of NPs&#44; a value at admission needs to be obtained &#40;during the first 24<span class="elsevierStyleHsp" style=""></span>h of hospitalization&#41; because their changes should be interpreted in terms of a relative reduction compared to the initial value&#46;</p></li><li class="elsevierStyleListItem" id="lsti0275"><span class="elsevierStyleLabel">-</span><p id="par0395" class="elsevierStylePara elsevierViewall">The reduction in NP levels in relative terms has greater usefulness than in absolute terms&#59; a 30&#37; reduction represents the threshold that has been associated with a better outcome&#46;<a class="elsevierStyleCrossRef" href="#bib0340"><span class="elsevierStyleSup">32</span></a></p></li><li class="elsevierStyleListItem" id="lsti0280"><span class="elsevierStyleLabel">-</span><p id="par0400" class="elsevierStylePara elsevierViewall">Their measurement as a therapy guideline&#44; at intermediate times between admission and discharge&#44; is not justified and should be restricted to specific conditions&#44; such as diuretic adjustment to resolve congestion&#46;</p></li><li class="elsevierStyleListItem" id="lsti0285"><span class="elsevierStyleLabel">-</span><p id="par0405" class="elsevierStylePara elsevierViewall">Their serial measurement should not be performed to determine when the patient should be discharged&#46; However&#44; they can support the clinical judgment of discharge&#44; when the progress of the concentrations is considered&#46;</p></li></ul></p><p id="par0410" class="elsevierStylePara elsevierViewall"><span class="elsevierStyleItalic">C&#46;2&#46;</span> In the follow-up of outpatients with HF&#44; NP measurement is recommended within specialized HF units or consultations to&#8230;<ul class="elsevierStyleList" id="lis0070"><li class="elsevierStyleListItem" id="lsti0290"><span class="elsevierStyleLabel">-</span><p id="par0415" class="elsevierStylePara elsevierViewall">Confirm the decompensations&#46; NPs can help confirm the presence of decompensation in cases that have reasonable clinical uncertainty&#46;<a class="elsevierStyleCrossRef" href="#bib0345"><span class="elsevierStyleSup">33</span></a></p></li><li class="elsevierStyleListItem" id="lsti0295"><span class="elsevierStyleLabel">-</span><p id="par0420" class="elsevierStylePara elsevierViewall">Optimize medical treatment&#46; NPs can help optimize drug treatment&#44; based on the objective of achieving an NT-proBNP level less than 1000<span class="elsevierStyleHsp" style=""></span>pg&#47;mL&#46;<a class="elsevierStyleCrossRef" href="#bib0350"><span class="elsevierStyleSup">34</span></a> There are no BNP data for this use&#46;</p></li><li class="elsevierStyleListItem" id="lsti0300"><span class="elsevierStyleLabel">-</span><p id="par0425" class="elsevierStylePara elsevierViewall">In nonspecialized consultations&#44; their use should be limited to confirming decompensations in patients who have a value measured in a stable clinical situation&#46;</p></li></ul></p></span><span id="sec0050" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="sect0070">D&#46; Continuity of care</span><p id="par0430" class="elsevierStylePara elsevierViewall">NPs offer relevant information for the various professionals involved in caring for patients with HF during their progression&#44; which can vary&#46; The chronic character and complexity of HF entails the involvement of multidisciplinary teams&#44; thus the importance of contextualizing the NP concentrations of each patient at each developmental stage&#46; It is therefore recommended that&#8230;<ul class="elsevierStyleList" id="lis0075"><li class="elsevierStyleListItem" id="lsti0305"><span class="elsevierStyleLabel">-</span><p id="par0435" class="elsevierStylePara elsevierViewall">the medical history and medical reports reflect how many NP values are obtained at all points of the disease progression&#46;</p></li><li class="elsevierStyleListItem" id="lsti0310"><span class="elsevierStyleLabel">-</span><p id="par0440" class="elsevierStylePara elsevierViewall">the discharge report includes all values obtained during hospitalization&#46;</p></li></ul></p></span></span><span id="sec0055" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="sect0075">Conclusions and final recommendations</span><p id="par0445" class="elsevierStylePara elsevierViewall"><ul class="elsevierStyleList" id="lis0080"><li class="elsevierStyleListItem" id="lsti0315"><span class="elsevierStyleLabel">&#40;1&#41;</span><p id="par0450" class="elsevierStylePara elsevierViewall">NPs are diagnostic and prognostic tools with demonstrated usefulness and should therefore be available in all healthcare settings&#44; both in primary care and specialized care&#44; for use based on medical criteria&#46;</p></li><li class="elsevierStyleListItem" id="lsti0320"><span class="elsevierStyleLabel">&#40;2&#41;</span><p id="par0455" class="elsevierStylePara elsevierViewall">Their proper use requires that medical professionals receive sufficient training in the prelaboratory &#40;pathophysiology&#41;&#44; laboratory &#40;measurement methods&#41; and postlaboratory &#40;interpretation in the clinical context&#41; phases&#46;</p></li><li class="elsevierStyleListItem" id="lsti0325"><span class="elsevierStyleLabel">&#40;3&#41;</span><p id="par0460" class="elsevierStylePara elsevierViewall">Their efficient use requires their inclusion in consensus clinical protocols by all involved medical professionals &#40;emergency department&#44; specialized care&#44; primary care and laboratory&#41;&#46;</p></li><li class="elsevierStyleListItem" id="lsti0330"><span class="elsevierStyleLabel">&#40;4&#41;</span><p id="par0465" class="elsevierStylePara elsevierViewall">Their measurement is recommended for diagnosing HF in all patients with dyspnea who are admitted to the emergency department and who have no prior diagnosis of HF&#46;</p></li><li class="elsevierStyleListItem" id="lsti0335"><span class="elsevierStyleLabel">&#40;5&#41;</span><p id="par0470" class="elsevierStylePara elsevierViewall">Their measurement is recommended in outpatient consultations at the physician&#39;s discretion&#44; as an aid in the diagnosis of HF when there are questions concerning the diagnosis or when there is no prior diagnosis&#46; The evidence for this recommendation is greater if echocardiography is not available early on&#46;</p></li><li class="elsevierStyleListItem" id="lsti0340"><span class="elsevierStyleLabel">&#40;6&#41;</span><p id="par0475" class="elsevierStylePara elsevierViewall">Whenever the concentrations are measured&#44; they should be interpreted as a quantitative risk marker of death and unfavorable outcomes&#46; This information should be used in risk stratification as a supplement to the clinical assessment&#46;</p></li><li class="elsevierStyleListItem" id="lsti0345"><span class="elsevierStyleLabel">&#40;7&#41;</span><p id="par0480" class="elsevierStylePara elsevierViewall">In patients previously diagnosed with HF&#44; the request for NP measurement for the diagnosis of decompensation or as a prognostic marker <span class="elsevierStyleItalic">per se</span> is only recommended in those conditions in which the results help the clinical or therapeutic decision-making process&#46;</p></li><li class="elsevierStyleListItem" id="lsti0350"><span class="elsevierStyleLabel">&#40;8&#41;</span><p id="par0485" class="elsevierStylePara elsevierViewall">Their serial measurement or as a therapeutic guideline for patients with an established diagnosis of HF should not be performed routinely but instead should follow consensus clinical protocols or be restricted to specific HF units&#46;</p></li><li class="elsevierStyleListItem" id="lsti0355"><span class="elsevierStyleLabel">&#40;9&#41;</span><p id="par0490" class="elsevierStylePara elsevierViewall">Their usefulness in the continuity of care is unquestionable&#46; The results of the measurements should therefore always be reflected in the medical history&#44; the discharge report and the patient follow-up&#46;</p></li><li class="elsevierStyleListItem" id="lsti0360"><span class="elsevierStyleLabel">&#40;10&#41;</span><p id="par0495" class="elsevierStylePara elsevierViewall">Interaction between all involved professionals&#44; clinicians and laboratory staff is recommended&#44; which will result in joint training activities and improvements in the healthcare organization for the use of NPs&#46;</p></li></ul></p></span><span id="sec0060" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="sect0080">Conflicts of interest</span><p id="par0500" class="elsevierStylePara elsevierViewall">Jordi Ordo&#241;ez-Llanos declares having received support for research and attendance at conferences and payments as a speaker and member of the advisory committees of the major companies that market tests for measuring natriuretic peptides&#46;</p><p id="par0505" class="elsevierStylePara elsevierViewall">Antoni Bay&#233;s-Genis declares having received support for research and attendance at conferences and payments as a speaker by Roche Diagnostics&#46;</p><p id="par0510" class="elsevierStylePara elsevierViewall">D&#46; Pascual-Figal declares having received support for research from Roche Diagnostics and bioMerieux&#46;</p><p id="par0515" class="elsevierStylePara elsevierViewall">The other authors declare that they have no conflicts of interest&#46;</p></span></span>"
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        "resumen" => "<span id="abst0005" class="elsevierStyleSection elsevierViewall"><p id="spar0005" class="elsevierStyleSimplePara elsevierViewall">Natriuretic peptides are a useful laboratory tool for the diagnosis&#44; prognosis and treatment of patients with heart failure&#46; Natriuretic peptides are used in various healthcare settings &#40;consultations&#44; emergency department&#44; hospitalization&#44; laboratory&#41; and by various primary care and specialized professionals&#46; However&#44; their use in clinical practice is still scare and uneven&#46; Properly using and interpreting natriuretic peptides in clinical practice requires a minimum of prelaboratory &#40;pathophysiology&#41;&#44; laboratory &#40;methods&#41; and postlaboratory &#40;interpretation and integration of clinical data&#41; expertise&#46; The objective of this consensus document&#44; developed by several scientific societies&#44; is to update the necessary concepts and expertise on natriuretic peptides that enable its application in the diagnosis&#44; prognosis and treatment of heart failure&#44; in various healthcare environments&#46;</p></span>"
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        "resumen" => "<span id="abst0010" class="elsevierStyleSection elsevierViewall"><p id="spar0010" class="elsevierStyleSimplePara elsevierViewall">Los p&#233;ptidos natriur&#233;ticos son una herramienta de laboratorio &#250;til en el diagn&#243;stico&#44; pron&#243;stico y tratamiento de los pacientes con insuficiencia cardiaca&#46; Su uso involucra a diferentes &#225;mbitos sanitarios &#40;consultas&#44; urgencias&#44; hospitalizaci&#243;n&#44; laboratorio&#41; y a muy diferentes profesionales de la Atenci&#243;n Primaria o especializada&#46; Sin embargo&#44; su incorporaci&#243;n a la pr&#225;ctica asistencial a&#250;n es escasa y desigual&#46; Para un correcto uso e interpretaci&#243;n en la pr&#225;ctica cl&#237;nica se necesita un m&#237;nimo de conocimientos preanal&#237;ticos &#40;fisiopatolog&#237;a&#41;&#44; anal&#237;ticos &#40;m&#233;todos&#41; y postanal&#237;ticos &#40;interpretaci&#243;n e integraci&#243;n con los datos cl&#237;nicos&#41;&#46; Este documento de consenso elaborado por varias sociedades cient&#237;ficas tiene como objetivo actualizar los conceptos y conocimientos necesarios sobre los p&#233;ptidos natriur&#233;ticos que permitan su aplicaci&#243;n para el diagn&#243;stico&#44; pron&#243;stico y tratamiento de la insuficiencia cardiaca&#44; en los diferentes &#225;mbitos sanitarios&#46;</p></span>"
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        "nota" => "<p class="elsevierStyleNotepara" id="npar0015">Please cite this article as&#58; Pascual-Figal DA&#44; Casademont J&#44; Lobos JM&#44; Pi&#241;era P&#44; Bay&#233;s-Genis A&#44; Ord&#243;&#241;ez-Llanos J&#44; et al&#46; Documento de consenso y recomendaciones sobre el uso de los p&#233;ptidos natriur&#233;ticos en la pr&#225;ctica cl&#237;nica&#46; Rev Clin Esp&#46; 2016&#59;216&#58;313&#8211;322&#46;</p>"
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        "nota" => "<p class="elsevierStyleNotepara" id="npar0020">Consensus meeting held in Madrid on the 6th of October&#44; 2015&#46;</p>"
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          "en" => "<p id="spar0015" class="elsevierStyleSimplePara elsevierViewall">Diagram of the BNP production mechanism and natriuretic peptide receptor function&#46; <span class="elsevierStyleItalic">Abbreviations</span>&#58; ANP&#44; A or atrial natriuretic peptide&#59; BNP&#44; B or brain natriuretic peptide&#59; CNP&#44; C natriuretic peptide&#59; GMP&#44; guanosine monophosphate&#59; GTP&#58; guanosine triphosphate&#59; NPR&#44; natriuretic peptide receptor&#46;</p>"
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          "leyenda" => "<p id="spar0025" class="elsevierStyleSimplePara elsevierViewall">The BNP values in the second column correspond with those observed in the same population of individuals evaluated with the various methods&#46;<a class="elsevierStyleCrossRefs" href="#bib0355"><span class="elsevierStyleSup">35&#44;36</span></a> The results are expressed as median &#40;interquartile range&#41;<a class="elsevierStyleCrossRef" href="#bib0355"><span class="elsevierStyleSup">35</span></a> or mean<span class="elsevierStyleHsp" style=""></span>&#177;<span class="elsevierStyleHsp" style=""></span>standard deviation&#46;<a class="elsevierStyleCrossRef" href="#bib0360"><span class="elsevierStyleSup">36</span></a></p>"
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                  \t\t\t\t" class=""><thead title="thead"><tr title="table-row"><th class="td" title="table-head  " align="left" valign="top" scope="col" style="border-bottom: 2px solid black">BNP<br>Instrumentation company&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</th><th class="td" title="table-head  " colspan="2" align="center" valign="top" scope="col" style="border-bottom: 2px solid black">BNP &#40;pg&#47;mL&#41;<a class="elsevierStyleCrossRefs" href="#bib0355"><span class="elsevierStyleSup">35&#44;36</span></a></th><th class="td" title="table-head  " align="left" valign="top" scope="col" style="border-bottom: 2px solid black">Capture antibody &#40;aa of the epitope&#41;&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</th><th class="td" title="table-head  " align="left" valign="top" scope="col" style="border-bottom: 2px solid black">Detection antibody &#40;aa of the epitope&#41;&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</th><th class="td" title="table-head  " align="left" valign="top" scope="col" style="border-bottom: 2px solid black">Standard employed to calibrate the method&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</th></tr></thead><tbody title="tbody"><tr title="table-row"><td class="td-with-role" title="table-entry ; entry_with_role_rowhead " align="left" valign="top">Alere<a class="elsevierStyleCrossRef" href="#tblfn0005"><span class="elsevierStyleSup">a</span></a><br>Triage&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="char" valign="top">413 &#40;5&#8211;2&#46;170&#41;&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="char" valign="top">133<span class="elsevierStyleHsp" style=""></span>&#177;<span class="elsevierStyleHsp" style=""></span>10&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="left" valign="top">Monoclonal<br>&#40;5&#8211;13&#41;&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="left" valign="top">Omniclonal&#44; uncharacterized epitope&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="left" valign="top">Recombinant BNP&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td></tr><tr title="table-row"><td class="td-with-role" title="table-entry ; entry_with_role_rowhead " align="left" valign="top">Abbott<br>Architect<br>AxSYM<br>iSTAT&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="char" valign="top">526 &#40;13&#8211;3&#46;065&#41;&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="" valign="top">&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="left" valign="top">Monoclonal<br>&#40;5&#8211;13&#41;&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="left" valign="top">Monoclonal<br>&#40;26&#8211;32&#41;&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="left" valign="top">Synthetic BNP&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td></tr><tr title="table-row"><td class="td-with-role" title="table-entry ; entry_with_role_rowhead " align="left" valign="top">Beckman Coulter<br>Access&#44; Access 2<br>DxL&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="char" valign="top">464 &#40;18&#8211;2&#46;166&#41;&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="" valign="top">&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="left" valign="top">Omniclonal&#44; uncharacterized epitope&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="left" valign="top">Monoclonal<br>&#40;5&#8211;13&#41;&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="left" valign="top">Recombinant BNP&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td></tr><tr title="table-row"><td class="td-with-role" title="table-entry ; entry_with_role_rowhead " align="left" valign="top">Siemens<br>ACS 180<br>Advia Centaur<br>Advia Centaur CP<br>Advia Centaur XP&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="char" valign="top">315 &#40;11&#8211;1&#46;884&#41;&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="char" valign="top">114<span class="elsevierStyleHsp" style=""></span>&#177;<span class="elsevierStyleHsp" style=""></span>2&#46;9&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="left" valign="top">Monoclonal &#40;27&#8211;32&#41;&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="left" valign="top">Monoclonal<br>&#40;14&#8211;21&#41;&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="left" valign="top">Synthetic BNP&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td></tr><tr title="table-row"><td class="td-with-role" title="table-entry ; entry_with_role_rowhead " align="left" valign="top">Siemens<br>Dimension VISTA&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="" valign="top">&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="char" valign="top">108<span class="elsevierStyleHsp" style=""></span>&#177;<span class="elsevierStyleHsp" style=""></span>1&#46;95&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="left" valign="top">Monoclonal<br>&#40;14&#8211;21&#41;&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="left" valign="top">Monoclonal<br>&#40;27&#8211;32&#41;&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="left" valign="top">Synthetic BNP&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td></tr></tbody></table>
                  """
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            0 => array:3 [
              "identificador" => "tblfn0005"
              "etiqueta" => "a"
              "nota" => "<p class="elsevierStyleNotepara" id="npar0005">This method is taken as a reference because it was employed to obtain the clinical decision limits in the BNP study&#46;<a class="elsevierStyleCrossRef" href="#bib0260"><span class="elsevierStyleSup">16</span></a></p>"
            ]
          ]
        ]
        "descripcion" => array:1 [
          "en" => "<p id="spar0020" class="elsevierStyleSimplePara elsevierViewall">Characteristics of the methods for measuring BNP&#44; including the antibodies used&#44; the compound&#39;s epitopes recognized by the antibodies and the standard employed to calibrate the method&#46;</p>"
        ]
      ]
      2 => array:8 [
        "identificador" => "tbl0010"
        "etiqueta" => "Table 2"
        "tipo" => "MULTIMEDIATABLA"
        "mostrarFloat" => true
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        "detalles" => array:1 [
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          "leyenda" => "<p id="spar0035" class="elsevierStyleSimplePara elsevierViewall">The NT-proBNP values in the second column correspond to the mean and 2 standard deviations of the same serum for quality control of the Spanish Society of Clinical Chemistry and Molecular Pathology &#40;SEQC&#41; assayed repeatedly by the various methods in various clinical laboratories&#46; The methods with no NT-proBNP values were not used in any participating laboratory &#40;<span class="elsevierStyleItalic">n</span><span class="elsevierStyleHsp" style=""></span>&#61;<span class="elsevierStyleHsp" style=""></span>123&#41; in the Quality Control Program&#46;</p>"
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                0 => """
                  <table border="0" frame="\n
                  \t\t\t\t\tvoid\n
                  \t\t\t\t" class=""><thead title="thead"><tr title="table-row"><th class="td" title="table-head  " align="left" valign="top" scope="col" style="border-bottom: 2px solid black">NT-proBNP<br>Instrumentation company&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</th><th class="td" title="table-head  " align="left" valign="top" scope="col" style="border-bottom: 2px solid black">NT-proBNP &#40;pg&#47;mL&#41;&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</th><th class="td" title="table-head  " align="left" valign="top" scope="col" style="border-bottom: 2px solid black">Capture antibody &#40;aa of the epitope&#41;&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</th><th class="td" title="table-head  " align="left" valign="top" scope="col" style="border-bottom: 2px solid black">Detection antibody &#40;aa of the epitope&#41;&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</th><th class="td" title="table-head  " align="left" valign="top" scope="col" style="border-bottom: 2px solid black">Standard employed to calibrate the method&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</th></tr></thead><tbody title="tbody"><tr title="table-row"><td class="td-with-role" title="table-entry ; entry_with_role_rowhead " align="left" valign="top"><span class="elsevierStyleItalic">Roche Diagnostics</span><a class="elsevierStyleCrossRef" href="#tblfn0010"><span class="elsevierStyleSup">a</span></a>&#59; Modular E170&#44; Cobas e601&#44; e602&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="left" valign="top">116<span class="elsevierStyleHsp" style=""></span>&#177;<span class="elsevierStyleHsp" style=""></span>6&#46;7&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="left" valign="top">Monoclonal<br>&#40;27&#8211;31&#41;&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="left" valign="top">Monoclonal<br>&#40;42&#8211;46&#41;&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="left" valign="top">Synthetic NT-proBNP aa 1&#8211;76&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td></tr><tr title="table-row"><td class="td-with-role" title="table-entry ; entry_with_role_rowhead " align="left" valign="top"><span class="elsevierStyleItalic">Alere</span>&#59; Triage&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="" valign="top">&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="left" valign="top">Monoclonal<br>&#40;27&#8211;31&#41;&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="left" valign="top">Monoclonal<br>&#40;42&#8211;46&#41;&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="left" valign="top">Synthetic NT-proBNP aa 1&#8211;76&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td></tr><tr title="table-row"><td class="td-with-role" title="table-entry ; entry_with_role_rowhead " align="left" valign="top"><span class="elsevierStyleItalic">bioMerieux</span>&#59; VIDAS&#44; MiniVIDAS&#44; VIDAS 3&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="left" valign="top">86&#46;5<span class="elsevierStyleHsp" style=""></span>&#177;<span class="elsevierStyleHsp" style=""></span>11&#46;5&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="left" valign="top">Monoclonal<br>&#40;27&#8211;31&#41;&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="left" valign="top">Monoclonal<br>&#40;42&#8211;46&#41;&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="left" valign="top">Synthetic NT-proBNP aa 1&#8211;76&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td></tr><tr title="table-row"><td class="td-with-role" title="table-entry ; entry_with_role_rowhead " align="left" valign="top"><span class="elsevierStyleItalic">Mitsubishi Chemical</span>&#59; PATHFAST&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="" valign="top">&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="left" valign="top">Polyclonal<br>&#40;1&#8211;21&#41;&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="left" valign="top">Polyclonal<br>&#40;39&#8211;50&#41;&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="left" valign="top">Synthetic NT-proBNP aa 1&#8211;76&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td></tr><tr title="table-row"><td class="td-with-role" title="table-entry ; entry_with_role_rowhead " align="left" valign="top"><span class="elsevierStyleItalic">Nanogen LifeSign</span>&#59; DXpress Reader&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="" valign="top">&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="left" valign="top">Monoclonal<span class="elsevierStyleHsp" style=""></span>&#43;<span class="elsevierStyleHsp" style=""></span>polyclonal&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="left" valign="top">Polyclonal&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="left" valign="top">Synthetic NT-proBNP aa 1&#8211;76&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td></tr><tr title="table-row"><td class="td-with-role" title="table-entry ; entry_with_role_rowhead " align="left" valign="top"><span class="elsevierStyleItalic">Ortho Clinical Diagnostics</span>&#59; Vitros ECi 3600&#44; 5600&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="left" valign="top">226<span class="elsevierStyleHsp" style=""></span>&#177;<span class="elsevierStyleHsp" style=""></span>8&#46;7&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="left" valign="top">Polyclonal<br>&#40;1&#8211;21&#41;&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="left" valign="top">Polyclonal<br>&#40;39&#8211;50&#41;&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="left" valign="top">Synthetic NT-proBNP aa 1&#8211;76&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td></tr><tr title="table-row"><td class="td-with-role" title="table-entry ; entry_with_role_rowhead " align="left" valign="top"><span class="elsevierStyleItalic">Radiometer</span>&#59; AQT90 FLEX&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="left" valign="top">224<span class="elsevierStyleHsp" style=""></span>&#177;<span class="elsevierStyleHsp" style=""></span>7&#46;9&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="left" valign="top">Polyclonal<br>&#40;1&#8211;21&#41;&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="left" valign="top">Polyclonal<br>&#40;39&#8211;50&#41;&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="left" valign="top">Synthetic NT-proBNP aa 1&#8211;76&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td></tr><tr title="table-row"><td class="td-with-role" title="table-entry ; entry_with_role_rowhead " align="left" valign="top"><span class="elsevierStyleItalic">Response Biomedical</span>&#59; RAMP&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="" valign="top">&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="left" valign="top">Monoclonal<br>&#40;27&#8211;31&#41;&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="left" valign="top">Polyclonal<br>&#40;39&#8211;50&#41;&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="left" valign="top">Synthetic NT-proBNP aa 1&#8211;76&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td></tr><tr title="table-row"><td class="td-with-role" title="table-entry ; entry_with_role_rowhead " align="left" valign="top"><span class="elsevierStyleItalic">Roche Diagnostics</span>&#59;<br>Elecsys 2010&#44; Cobas e411<br>Cobas e601&#44; e602&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="left" valign="top">91<span class="elsevierStyleHsp" style=""></span>&#177;<span class="elsevierStyleHsp" style=""></span>7&#46;1<br>118<span class="elsevierStyleHsp" style=""></span>&#177;<span class="elsevierStyleHsp" style=""></span>9&#46;3&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="left" valign="top">Monoclonal<br>&#40;27&#8211;31&#41;&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="left" valign="top">Monoclonal<br>&#40;42&#8211;46&#41;&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="left" valign="top">Synthetic NT-proBNP aa 1&#8211;76&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td></tr><tr title="table-row"><td class="td-with-role" title="table-entry ; entry_with_role_rowhead " align="left" valign="top"><span class="elsevierStyleItalic">Siemens</span><br>Dimension RxL&#44; Xpand Dimension VISTA&#44; Dimension EXL<br>Stratus CS&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="left" valign="top">58<span class="elsevierStyleHsp" style=""></span>&#177;<span class="elsevierStyleHsp" style=""></span>9&#46;9<br>110<span class="elsevierStyleHsp" style=""></span>&#177;<span class="elsevierStyleHsp" style=""></span>3&#46;3<br>75<span class="elsevierStyleHsp" style=""></span>&#177;<span class="elsevierStyleHsp" style=""></span>6&#46;2<br>220<span class="elsevierStyleHsp" style=""></span>&#177;<span class="elsevierStyleHsp" style=""></span>4&#46;5&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="left" valign="top">Monoclonal &#40;22&#8211;28&#41;&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="left" valign="top">Monoclonal<br>&#40;42&#8211;46&#41;&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="left" valign="top">Synthetic NT-proBNP aa 1&#8211;76&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td></tr><tr title="table-row"><td class="td-with-role" title="table-entry ; entry_with_role_rowhead " align="left" valign="top"><span class="elsevierStyleItalic">Siemens</span><br>Immulite 1000&#44; 2000&#44; 2500&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="left" valign="top">401&#46;5<span class="elsevierStyleHsp" style=""></span>&#177;<span class="elsevierStyleHsp" style=""></span>7&#46;8&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="left" valign="top">Polyclonal<br>&#40;1&#8211;21&#41;&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="left" valign="top">Polyclonal<br>&#40;39&#8211;50&#41;&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="left" valign="top">Synthetic NT-proBNP aa 1&#8211;76&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td></tr></tbody></table>
                  """
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            0 => array:3 [
              "identificador" => "tblfn0010"
              "etiqueta" => "a"
              "nota" => "<p class="elsevierStyleNotepara" id="npar0010">This method is taken as the reference because it was the most widely used by the laboratories that participated in the SEQC Quality Control Program&#46;</p>"
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          ]
        ]
        "descripcion" => array:1 [
          "en" => "<p id="spar0030" class="elsevierStyleSimplePara elsevierViewall">Characteristics of the Methods for Measuring NT-proBNP&#44; including the antibodies used&#44; the compound&#39;s epitopes recognized by the antibodies and the standard employed to calibrate the method&#46;</p>"
        ]
      ]
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        "identificador" => "tbl0015"
        "etiqueta" => "Table 3"
        "tipo" => "MULTIMEDIATABLA"
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        "tabla" => array:1 [
          "tablatextoimagen" => array:1 [
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                0 => """
                  <table border="0" frame="\n
                  \t\t\t\t\tvoid\n
                  \t\t\t\t" class=""><thead title="thead"><tr title="table-row"><th class="td" title="table-head  " align="" valign="top" scope="col" style="border-bottom: 2px solid black">&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</th><th class="td" title="table-head  " align="left" valign="top" scope="col" style="border-bottom: 2px solid black">NT-proBNP<br>pg&#47;mL&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</th><th class="td" title="table-head  " align="left" valign="top" scope="col" style="border-bottom: 2px solid black">BNP<br>pg&#47;mL&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</th><th class="td" title="table-head  " align="left" valign="top" scope="col" style="border-bottom: 2px solid black">Diagnostic value&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</th></tr></thead><tbody title="tbody"><tr title="table-row"><td class="td" title="table-entry  " rowspan="3" align="left" valign="top">Emergency Department</td><td class="td" title="table-entry  " align="left" valign="top">&#60;300&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="char" valign="top">&#60;100&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="left" valign="top">HF very unlikely&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td></tr><tr title="table-row"><td class="td-with-role" title="table-entry ; entry_with_role_rowhead " align="left" valign="top">&#60;50 years&#58; 300&#8211;450<br>50&#8211;75 years&#58; 300&#8211;900<br>&#62;75 years&#58; 300&#8211;1800&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="char" valign="top">100&#8211;400&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="left" valign="top">Not determinative&#46; The clinical criterion of probability should predominate&#44; taking into account other situations&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td></tr><tr title="table-row"><td class="td-with-role" title="table-entry ; entry_with_role_rowhead " align="left" valign="top">&#60;50 years&#58; &#62;450<br>50&#8211;75 years&#58; &#62;900<br>&#62;75 years&#58; &#62;1800&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="char" valign="top">&#62;400&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="left" valign="top">HF with high probability&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td></tr><tr title="table-row"><td class="td" title="table-entry  " colspan="4" align="left" valign="top"><span class="elsevierStyleVsp" style="height:0.5px"></span></td></tr><tr title="table-row"><td class="td-with-role" title="table-entry ; entry_with_role_rowhead " align="left" valign="top">Outpatient&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="left" valign="top">&#60;125&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="char" valign="top">&#60;35&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="left" valign="top">HF very unlikely&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td></tr></tbody></table>
                  """
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          "en" => "<p id="spar0040" class="elsevierStyleSimplePara elsevierViewall">Reference NT-proBNP and BNP values for the diagnosis of heart failure&#46;</p>"
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Special article
Consensus document and recommendations on the use of natriuretic peptides in clinical practice
Documento de consenso y recomendaciones sobre el uso de los péptidos natriuréticos en la práctica clínica
D.A. Pascual-Figala, J. Casademontb,
Corresponding author
jcasademont@santpau.cat

Corresponding author.
, J.M. Lobosc, P. Piñerad, A. Bayés-Genisa, J. Ordóñez-Llanosa, J.R. González-Juanateya
a Sociedad Española de Cardiología (SEC), Spain
b Sociedad Española de Medicina Interna (SEMI), Spain
c Sociedad Española de Medicina Familiar y Comunitaria (SEMFyC), Spain
d Sociedad Española de Medicina de Urgencias (SEMES), Spain
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        "titulo" => "Documento de consenso y recomendaciones sobre el uso de los p&#233;ptidos natriur&#233;ticos en la pr&#225;ctica cl&#237;nica"
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          "en" => "<p id="spar0015" class="elsevierStyleSimplePara elsevierViewall">Diagram of the BNP production mechanism and natriuretic peptide receptor function&#46; <span class="elsevierStyleItalic">Abbreviations</span>&#58; ANP&#44; A or atrial natriuretic peptide&#59; BNP&#44; B or brain natriuretic peptide&#59; CNP&#44; C natriuretic peptide&#59; GMP&#44; guanosine monophosphate&#59; GTP&#58; guanosine triphosphate&#59; NPR&#44; natriuretic peptide receptor&#46;</p>"
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    "textoCompleto" => "<span class="elsevierStyleSections"><span id="sec0005" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="sect0025">Background</span><p id="par0005" class="elsevierStylePara elsevierViewall">The present document emerged from the scientific societies that signed it as a set of evidence-based consensus recommendations on the use of natriuretic peptides &#40;NPs&#41; in heart failure &#40;HF&#41;&#46; The document&#39;s objective is to improve the medical care of patients with HF and to more efficiently use resources in healthcare activities&#46;</p><p id="par0010" class="elsevierStylePara elsevierViewall">NPs have become a laboratory tool with significant implications in the diagnosis&#44; prognosis and treatment of patients with suspected or confirmed HF&#46; The use of NPs affects various healthcare settings &#40;outpatient consultations&#44; emergency department&#44; hospitalization and laboratory&#41; and by various primary care and specialized professionals&#46; The proper use of NPs has implications for patients and for the healthcare system&#44; especially considering the epidemic nature of HF&#46; For this reason&#44; a scientific consensus is needed as a guide and to establish specific recommendations on the appropriate use of NPs in clinical practice&#46;</p><p id="par0015" class="elsevierStylePara elsevierViewall">Although there are various types of NPs&#44; this document focuses on those that have shown their usefulness in clinical studies&#58; B-type natriuretic peptides and related metabolites&#46;</p></span><span id="sec0010" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="sect0030">Current situation in Spain</span><p id="par0020" class="elsevierStylePara elsevierViewall">The current recommendations on the use of NPs in clinical practice are based on international guidelines from scientific societies&#46; NPs are included in the diagnostic algorithm for patients with HF in the 2001 clinical practice guidelines&#46;<a class="elsevierStyleCrossRef" href="#bib0185"><span class="elsevierStyleSup">1</span></a> Reference values for the diagnosis of acute HF were first published in 2005&#46;<a class="elsevierStyleCrossRef" href="#bib0190"><span class="elsevierStyleSup">2</span></a> Since then&#44; the incorporation of NPs in subsequent clinical practice guidelines has been progressive&#46; The most recent guidelines of 2012 and 2013 published for the first time the reference concentrations for use in the outpatient and emergency diagnosis&#46; A recommendation of IA was established for the use of NPs in the diagnosis and prognostic assessment of patients&#46;<a class="elsevierStyleCrossRefs" href="#bib0195"><span class="elsevierStyleSup">3&#44;4</span></a> Therefore&#44; more than 10 years were needed for its definitive incorporation into the guidelines of scientific societies&#46;</p><p id="par0025" class="elsevierStylePara elsevierViewall">In healthcare practice&#44; the incorporation of NPs has been even slower and with significant disparity&#44; which&#44; although it has been improving&#44; does not reflect the guidelines&#8217; current recommendations&#46; In fact&#44; in a survey by the Spanish Society of Cardiology conducted in January 2015 among 107 public hospitals covering a treated population of more than 31 million inhabitants&#44; the emergency reading of NPs was available in 65&#37; of the emergency departments &#40;which would equal only 66&#37; of the population treated by this set of departments&#41;&#46;<a class="elsevierStyleCrossRef" href="#bib0205"><span class="elsevierStyleSup">5</span></a> In a survey of 96 emergency departments a year earlier&#44; the Spanish Society of Emergency Medicine reported that 59&#37; of centers had NPs&#46;<a class="elsevierStyleCrossRef" href="#bib0210"><span class="elsevierStyleSup">6</span></a></p></span><span id="sec0015" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="sect0035">Definitions and prior knowledge</span><p id="par0030" class="elsevierStylePara elsevierViewall">An appropriate use and interpretation of NPs in clinical practice is possible only if the physician has knowledge of its pathophysiology and measurement methodology&#46; The items related to their pathophysiology and methodology are listed below&#46; Their reading and understanding are required for any physician who seeks to interpret NP concentrations in their patients&#46;</p><span id="sec0020" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="sect0040">A&#46; Pathophysiology</span><p id="par0035" class="elsevierStylePara elsevierViewall"><ul class="elsevierStyleList" id="lis0005"><li class="elsevierStyleListItem" id="lsti0005"><span class="elsevierStyleLabel">1&#46;</span><p id="par0040" class="elsevierStylePara elsevierViewall">NPs are bioactive peptides with numerous biological effects&#46;<a class="elsevierStyleCrossRef" href="#bib0215"><span class="elsevierStyleSup">7</span></a> There are 3 families of NPs&#58; ANPs &#40;type A&#44; atrial NPs&#41;&#44; BNPs &#40;type B&#44; brain NPs&#41; and CNPs &#40;C-type NPs&#41;&#46; A and B-type NPs have systemic effects and are produced mainly in cardiomyocytes&#46; CNPs are mainly produced in endothelial cells and act as an autocrine and paracrine factor&#46;</p></li><li class="elsevierStyleListItem" id="lsti0010"><span class="elsevierStyleLabel">2&#46;</span><p id="par0045" class="elsevierStylePara elsevierViewall">The effects of NPs are mediated by its binding to 3 types of receptors&#44; 2 of which are functional and 1 of which is clearing&#46;<a class="elsevierStyleCrossRef" href="#bib0220"><span class="elsevierStyleSup">8</span></a> The 2 functional receptors &#40;natriuretic peptide receptor &#91;NPR&#93;&#41; have been characterized as A-type &#40;NPR-A&#41; and B-type &#40;NPR-B&#41; and are expressed in the cardiovascular system and numerous organs &#40;lungs&#44; kidneys&#44; skin and brain&#41;&#46; Binding to these receptors stimulates the production of cyclic guanosine-monophosphate &#40;cGMP&#41;&#46;</p></li><li class="elsevierStyleListItem" id="lsti0015"><span class="elsevierStyleLabel">3&#46;</span><p id="par0050" class="elsevierStylePara elsevierViewall">NPs are antagonists of the renin-angiotensin-aldosterone system&#46; Their main actions are reducing peripheral vascular resistance and increasing natriuresis and diuresis&#46; The antifibrotic and antihypertrophic effects of NPs in the myocardium have recently been identified&#46;</p></li><li class="elsevierStyleListItem" id="lsti0020"><span class="elsevierStyleLabel">4&#46;</span><p id="par0055" class="elsevierStylePara elsevierViewall">B-type NPs are of greatest interest due to their proven clinical utility&#46; The responsible gene is located in chromosome 1&#46; The molecule is synthesized as a preprohormone &#40;pre-proBNP&#41;&#44; which undergoes cleavage of a signal peptide for conversion into the prohormone &#40;proBNP&#41;&#46; Most of the proBNP is then cleaved intracellularly or during its secretion to the circulation&#44; resulting in the amino-terminal portion of the proBNP &#40;NT-proBNP&#41; and in the BNP &#40;<a class="elsevierStyleCrossRef" href="#fig0005">Fig&#46; 1</a>&#41;&#46;</p><elsevierMultimedia ident="fig0005"></elsevierMultimedia></li><li class="elsevierStyleListItem" id="lsti0025"><span class="elsevierStyleLabel">5&#46;</span><p id="par0060" class="elsevierStylePara elsevierViewall">There are 3 major forms of B-type NPs in the circulation&#58; The biologically inactive NT-proBNP of 76 amino acids&#59; the biologically active BNP of 32 amino acids&#59; and the compound precursor&#44; proBNP&#44; of 108 amino acids&#44; whose biological activity is approximately 10&#37; that of the BNP&#46; Truncated fragments and modified forms of the 3 B-type NPs have also been detected&#46;</p></li><li class="elsevierStyleListItem" id="lsti0030"><span class="elsevierStyleLabel">6&#46;</span><p id="par0065" class="elsevierStylePara elsevierViewall">B-type NPs are produced in atria and ventricles&#46; The left ventricle is the main source&#44; but production by the atria is significant&#46;</p></li><li class="elsevierStyleListItem" id="lsti0035"><span class="elsevierStyleLabel">7&#46;</span><p id="par0070" class="elsevierStylePara elsevierViewall">The production of B-type NPs &#40;<a class="elsevierStyleCrossRef" href="#fig0005">Fig&#46; 1</a>&#41; is governed mechanically and proportionally to the increase in tension in the cardiomyocytes&#46; Their synthesis is rapid after the stimulation&#44; with no significant intracellular deposits&#46; After synthesis&#44; the BNPs are secreted into the circulation&#46; Myocardial damage also entails their secretion&#46; In practice&#44; HF is the main cause &#40;although not the only one&#41; of increased concentrations of circulating NPs&#46; This increase occurs in the presence of both systolic and diastolic dysfunction&#46;</p></li><li class="elsevierStyleListItem" id="lsti0040"><span class="elsevierStyleLabel">8&#46;</span><p id="par0075" class="elsevierStylePara elsevierViewall">Although the release of BNP and NT-proBNP is equimolecular&#44; their half-lives are different&#46; The half-lives of BNP and NT-proBNP are 21<span class="elsevierStyleHsp" style=""></span>min and approximately 70<span class="elsevierStyleHsp" style=""></span>min&#44; respectively&#46; NT-proBNP concentrations are therefore greater than those of BNP&#46;</p></li><li class="elsevierStyleListItem" id="lsti0045"><span class="elsevierStyleLabel">9&#46;</span><p id="par0080" class="elsevierStylePara elsevierViewall">The clearance of circulating BNP is produced actively by its binding to the natriuretic peptide receptor C &#40;NPR-C&#41; and by the action of neprilysin&#46; Neprilysin is a membrane neutral endopeptidase&#44; which degrades the existing ring structure in BNP&#44; proBNP and pre-proBNP but not in NT-proBNP and causes proteolysis of these molecules&#46; In conditions of homeostasis&#44; clearance through binding to NPR-C predominates&#46; In volume overload or pressure conditions &#40;<span class="elsevierStyleItalic">e&#46;g&#46;</span>&#44; in HF&#41;&#44; clearance by neprilysin predominates &#40;<a class="elsevierStyleCrossRef" href="#fig0005">Fig&#46; 1</a>&#41;&#46;</p></li></ul></p></span><span id="sec0025" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="sect0045">B&#46; Biochemistry and measurement methods</span><p id="par0085" class="elsevierStylePara elsevierViewall"><ul class="elsevierStyleList" id="lis0010"><li class="elsevierStyleListItem" id="lsti0050"><span class="elsevierStyleLabel">1&#46;</span><p id="par0090" class="elsevierStylePara elsevierViewall">There are immunoassays for measuring the various A-type NPs &#40;ANP&#44; NT-proANP&#44; MR-proANP&#41; and B-type NPs &#40;BNP&#44; NT-proBNP&#44; proBNP&#41;&#46; The immunoassays can be totally automated or partially manual such as the point-of-care methods&#46; <a class="elsevierStyleCrossRefs" href="#tbl0005">Tables 1 and 2</a> show the main characteristics of the methods available for measuring BNP and NT-proBNP&#46;</p><elsevierMultimedia ident="tbl0005"></elsevierMultimedia><elsevierMultimedia ident="tbl0010"></elsevierMultimedia></li><li class="elsevierStyleListItem" id="lsti0055"><span class="elsevierStyleLabel">2&#46;</span><p id="par0095" class="elsevierStylePara elsevierViewall">The existing immunoassays for measuring BNP use antibodies that recognize not only circulating BNP but also variably recognize BNP fragments and proBNP&#46; This situation creates significant differences among the various immunoassays and hinders the comparison of values between the immunoassays &#40;<a class="elsevierStyleCrossRef" href="#tbl0005">Table 1</a>&#41;&#46;</p></li><li class="elsevierStyleListItem" id="lsti0060"><span class="elsevierStyleLabel">3&#46;</span><p id="par0100" class="elsevierStylePara elsevierViewall">The existing immunoassays for measuring NT-proBNP use the same or similar antibodies and mostly detect NT-proBNP and residually detect proBNP &#40;<a class="elsevierStyleCrossRef" href="#tbl0010">Table 2</a>&#41;&#46;</p></li><li class="elsevierStyleListItem" id="lsti0065"><span class="elsevierStyleLabel">4&#46;</span><p id="par0105" class="elsevierStylePara elsevierViewall">Due to the fact that the immunoassays detect molecular forms of BNP and NT-proBNP with different molecular weights&#44; their concentrations cannot be expressed in molar units &#40;<span class="elsevierStyleItalic">e&#46;g&#46;</span>&#44; mmol&#47;L&#41;&#46; The common unit for expressing their concentration is pg&#47;mL &#40;equivalent to ng&#47;L&#41;&#46;</p></li><li class="elsevierStyleListItem" id="lsti0070"><span class="elsevierStyleLabel">5&#46;</span><p id="par0110" class="elsevierStylePara elsevierViewall">Immunoassays for measuring BNP and NT-proBNP have low analytical variability&#44; which is greater in the point-of-care type than in the automated type&#46; This low variability helps detect differences between successive measurements attributable to changes in the clinical condition and not to analytical variability&#46;<a class="elsevierStyleCrossRef" href="#bib0225"><span class="elsevierStyleSup">9</span></a></p></li><li class="elsevierStyleListItem" id="lsti0075"><span class="elsevierStyleLabel">6&#46;</span><p id="par0115" class="elsevierStylePara elsevierViewall">Circulating concentrations of B-type NPs have biological variability in healthy individuals and in stable patients&#46; This variability is greater for BNP than for NT-proBNP and increases as the serial interval and NP concentration decrease&#46; For example&#44; for weekly measurements in patients with stable HF&#44; the biological variability can reach 50&#37; for BNP and 25&#37; for NT-proBNP&#46;<a class="elsevierStyleCrossRef" href="#bib0230"><span class="elsevierStyleSup">10</span></a></p></li><li class="elsevierStyleListItem" id="lsti0080"><span class="elsevierStyleLabel">7&#46;</span><p id="par0120" class="elsevierStylePara elsevierViewall">The BNP and NT-proBNP concentrations increase with age and are higher in women than in men&#46; Reference values stratified by age have been published for both NPs&#46; Obesity decreases the concentrations of BNP and NT-proBNP&#46;<a class="elsevierStyleCrossRef" href="#bib0225"><span class="elsevierStyleSup">9</span></a></p></li><li class="elsevierStyleListItem" id="lsti0085"><span class="elsevierStyleLabel">8&#46;</span><p id="par0125" class="elsevierStylePara elsevierViewall">There are extracardiac causes for the increase in circulating concentrations of B-type NPs&#44; either through cardiac stress or an increase in circulating blood volume&#44; which should be interpreted in each clinical context&#46; Among them&#44; renal failure and pulmonary hypertension are the most clinically relevant&#46;<a class="elsevierStyleCrossRef" href="#bib0235"><span class="elsevierStyleSup">11</span></a></p></li><li class="elsevierStyleListItem" id="lsti0090"><span class="elsevierStyleLabel">9&#46;</span><p id="par0130" class="elsevierStylePara elsevierViewall">BNP and NT-proBNP concentrations are increased in renal dysfunction and are higher the more severe the dysfunction&#46; The use of reference values stratified by age minimizes the effect of renal dysfunction on NT-proBNPvalues&#46;<a class="elsevierStyleCrossRef" href="#bib0240"><span class="elsevierStyleSup">12</span></a></p></li><li class="elsevierStyleListItem" id="lsti0095"><span class="elsevierStyleLabel">10&#46;</span><p id="par0135" class="elsevierStylePara elsevierViewall">When interpreting NP concentrations&#44; clinicians should consider the effect of particular drugs &#40;currently&#44; neprilysin inhibitors and recombinant BNP&#41; on the concentrations&#46;</p></li></ul></p></span></span><span id="sec0030" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="sect0050">Recommendations for using B-type NPs</span><p id="par0140" class="elsevierStylePara elsevierViewall">As general criteria for the use of NPs in the various clinical scenarios&#44; the recommendations are as follows&#58;<ul class="elsevierStyleList" id="lis0015"><li class="elsevierStyleListItem" id="lsti0100"><span class="elsevierStyleLabel">-</span><p id="par0145" class="elsevierStylePara elsevierViewall">Prior training in prelaboratory &#40;pathophysiology&#41;&#44; laboratory &#40;methods&#41; and postlaboratory &#40;interpretation and integration with the symptoms&#41; terms&#46;</p></li><li class="elsevierStyleListItem" id="lsti0105"><span class="elsevierStyleLabel">-</span><p id="par0150" class="elsevierStylePara elsevierViewall">Reasoned use based on the expected usefulness for improving decision making&#44; the diagnosis or the treatment of patients&#46;</p></li><li class="elsevierStyleListItem" id="lsti0110"><span class="elsevierStyleLabel">-</span><p id="par0155" class="elsevierStylePara elsevierViewall">Use of consensus protocols&#44; in which all departments involved in the use of NPs should participate&#46;</p></li></ul></p><span id="sec0035" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="sect0055">A&#46; Diagnosis</span><p id="par0160" class="elsevierStylePara elsevierViewall">The measurement of NPs for diagnostic purposes represents the main clinical application&#44; the most extensively studied application and the one with the most scientific evidence&#46;<a class="elsevierStyleCrossRefs" href="#bib0195"><span class="elsevierStyleSup">3&#44;4</span></a></p><p id="par0165" class="elsevierStylePara elsevierViewall">The following general recommendations have been established &#40;<a class="elsevierStyleCrossRef" href="#tbl0015">Table 3</a>&#41;&#58;<ul class="elsevierStyleList" id="lis0020"><li class="elsevierStyleListItem" id="lsti0115"><span class="elsevierStyleLabel">-</span><p id="par0170" class="elsevierStylePara elsevierViewall">Their measurement coupled with clinical judgment improves diagnostic accuracy compared with clinical diagnosis alone&#44; particularly in cases of uncertainty&#46;<a class="elsevierStyleCrossRefs" href="#bib0245"><span class="elsevierStyleSup">13&#8211;15</span></a></p></li><li class="elsevierStyleListItem" id="lsti0120"><span class="elsevierStyleLabel">-</span><p id="par0175" class="elsevierStylePara elsevierViewall">Their usefulness in the diagnosis has been studied in patients in whom dyspnea is the main symptom&#46;<a class="elsevierStyleCrossRefs" href="#bib0240"><span class="elsevierStyleSup">12&#44;16</span></a></p></li><li class="elsevierStyleListItem" id="lsti0125"><span class="elsevierStyleLabel">-</span><p id="par0180" class="elsevierStylePara elsevierViewall">Their usefulness is mainly a result of their high negative predictive value for excluding HF&#44; especially in patients with no prior diagnosis&#46;<a class="elsevierStyleCrossRefs" href="#bib0265"><span class="elsevierStyleSup">17&#44;18</span></a></p></li></ul></p><elsevierMultimedia ident="tbl0015"></elsevierMultimedia><p id="par0185" class="elsevierStylePara elsevierViewall">The diagnostic use of NPs in 2 settings &#40;emergency department or hospital setting and the outpatient or doctor&#39;s office setting&#41; is discussed below&#46;</p><p id="par0190" class="elsevierStylePara elsevierViewall"><span class="elsevierStyleItalic">A&#46;1&#46;</span> The measurement of B-type NP concentrations should be performed for all patients who go to the emergency department for dyspnea and for those with suspected <span class="elsevierStyleItalic">de novo</span> HF &#40;with no prior established diagnosis&#41;&#46;<ul class="elsevierStyleList" id="lis0025"><li class="elsevierStyleListItem" id="lsti0130"><span class="elsevierStyleLabel">-</span><p id="par0195" class="elsevierStylePara elsevierViewall">The use of B-type NPs has been shown to be cost-effective in this scenario and to have an effect on patient diagnosis and treatment&#46;<a class="elsevierStyleCrossRef" href="#bib0275"><span class="elsevierStyleSup">19</span></a></p></li><li class="elsevierStyleListItem" id="lsti0135"><span class="elsevierStyleLabel">-</span><p id="par0200" class="elsevierStylePara elsevierViewall">Their usefulness is greater in conditions of clinical uncertainty&#44; prior to the initial assessment that has to include the case history&#44; physical examination&#44; electrocardiogram and chest radiology&#46;<a class="elsevierStyleCrossRefs" href="#bib0280"><span class="elsevierStyleSup">20&#44;21</span></a></p></li><li class="elsevierStyleListItem" id="lsti0140"><span class="elsevierStyleLabel">-</span><p id="par0205" class="elsevierStylePara elsevierViewall">Their measurement should be performed with the patient&#39;s first blood sample upon their arrival at the emergency department&#46; The early availability of results facilitates a better diagnosis and treatment&#46;</p></li><li class="elsevierStyleListItem" id="lsti0145"><span class="elsevierStyleLabel">-</span><p id="par0210" class="elsevierStylePara elsevierViewall">A low value &#40;NT-proBNP<span class="elsevierStyleHsp" style=""></span>&#60;300<span class="elsevierStyleHsp" style=""></span>pg&#47;mL or BNP<span class="elsevierStyleHsp" style=""></span>&#60;100<span class="elsevierStyleHsp" style=""></span>pg&#47;mL&#41; helps rule out the presence of HF regardless of age&#44; with a negative predictive value of 98&#37; for NT-proBNP and 90&#37; for BNP&#46;<a class="elsevierStyleCrossRefs" href="#bib0240"><span class="elsevierStyleSup">12&#44;13&#44;16&#44;22</span></a></p></li><li class="elsevierStyleListItem" id="lsti0150"><span class="elsevierStyleLabel">-</span><p id="par0215" class="elsevierStylePara elsevierViewall">For NT-proBNP&#44; the use of age-adjusted values helps improve the ability to identify the presence of HF&#58; &#62;450<span class="elsevierStyleHsp" style=""></span>pg&#47;mL &#40;&#60;50 years&#41;&#44; &#62;900<span class="elsevierStyleHsp" style=""></span>pg&#47;mL &#40;50&#8211;75 years&#41; and &#62;1800<span class="elsevierStyleHsp" style=""></span>pg&#47;mL &#40;&#62;75 years&#41;&#46;<a class="elsevierStyleCrossRefs" href="#bib0240"><span class="elsevierStyleSup">12&#44;23</span></a> Overall&#44; the positive predictive value of these values is 88&#37;&#46;<a class="elsevierStyleCrossRef" href="#bib0240"><span class="elsevierStyleSup">12</span></a></p></li><li class="elsevierStyleListItem" id="lsti0155"><span class="elsevierStyleLabel">-</span><p id="par0220" class="elsevierStylePara elsevierViewall">A high BNP value &#40;&#62;400<span class="elsevierStyleHsp" style=""></span>pg&#47;mL&#41;&#44; regardless of age&#44; should lead clinicians to consider the diagnosis of HF as probable&#44; with a positive predictive value of 86&#37;&#46;<a class="elsevierStyleCrossRef" href="#bib0290"><span class="elsevierStyleSup">22</span></a></p></li><li class="elsevierStyleListItem" id="lsti0160"><span class="elsevierStyleLabel">-</span><p id="par0225" class="elsevierStylePara elsevierViewall">To interpret intermediate values of NT-proBNP or BNP&#44; the clinical judgment for the likelihood of HF should predominate&#44; taking into consideration other conditions that could influence the concentrations of both peptides&#46;</p></li><li class="elsevierStyleListItem" id="lsti0165"><span class="elsevierStyleLabel">-</span><p id="par0230" class="elsevierStylePara elsevierViewall">For patients who already have a prior diagnosis of HF&#44; NPs should not be routinely measured on arrival at the emergency department or during hospitalization&#46; Nevertheless&#44; their measurement should be considered for patients who have a prior reading in a stable clinical condition &#40;outpatient or at the time of discharge for a prior decompensation&#41; and for whom there are questions about current acute decompensation of the HF&#46; Only in these cases&#44; individually and within a scenario of diagnostic uncertainty as to the role of HF in the current event&#44; is their measurement recommended&#46;</p></li></ul></p><p id="par0235" class="elsevierStylePara elsevierViewall"><span class="elsevierStyleItalic">A&#46;2&#46;</span> The measurement of NP concentrations should be accessible in outpatient consultations at the physician&#39;s discretion for patients with clinically suspected <span class="elsevierStyleItalic">de novo</span> HF &#40;with no prior established diagnosis&#41;&#46; This criterion should take in account the following&#58;<ul class="elsevierStyleList" id="lis0030"><li class="elsevierStyleListItem" id="lsti0170"><span class="elsevierStyleLabel">-</span><p id="par0240" class="elsevierStylePara elsevierViewall">NP measurements should be requested for patients with diagnostic uncertainty&#44; after the initial clinical assessment&#46;<a class="elsevierStyleCrossRef" href="#bib0300"><span class="elsevierStyleSup">24</span></a></p></li><li class="elsevierStyleListItem" id="lsti0175"><span class="elsevierStyleLabel">-</span><p id="par0245" class="elsevierStylePara elsevierViewall">It is recommended that the result be made available&#44; ideally&#44; within 48<span class="elsevierStyleHsp" style=""></span>h of obtaining the sample&#46;</p></li><li class="elsevierStyleListItem" id="lsti0180"><span class="elsevierStyleLabel">-</span><p id="par0250" class="elsevierStylePara elsevierViewall">The result should provide data for ruling out HF&#44; with reference values of 125<span class="elsevierStyleHsp" style=""></span>pg&#47;mL &#40;NT-proBNP&#41; and 35<span class="elsevierStyleHsp" style=""></span>pg&#47;mL &#40;BNP&#41;&#46; Lower concentrations have a negative predictive value of 96&#8211;99&#37;&#46;<a class="elsevierStyleCrossRefs" href="#bib0255"><span class="elsevierStyleSup">15&#44;25</span></a></p></li><li class="elsevierStyleListItem" id="lsti0185"><span class="elsevierStyleLabel">-</span><p id="par0255" class="elsevierStylePara elsevierViewall">Their initial request is preferable to echocardiography &#40;due to accessibility and financial cost&#41;&#44; especially if the latter is delayed by more than 7 days&#46;</p></li><li class="elsevierStyleListItem" id="lsti0190"><span class="elsevierStyleLabel">-</span><p id="par0260" class="elsevierStylePara elsevierViewall">A value higher than the upper limit means that treatment for HF should start and that echocardiography should be performed to define the presence of heart disease</p></li></ul></p></span><span id="sec0040" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="sect0060">B&#46; Prognosis</span><p id="par0265" class="elsevierStylePara elsevierViewall">Although the prognostic utility of NPs in HF has been firmly established&#44; their use for this purpose should be tied to a number of specific conditions&#46;</p><p id="par0270" class="elsevierStylePara elsevierViewall">The following general recommendations have been established&#58;<ul class="elsevierStyleList" id="lis0035"><li class="elsevierStyleListItem" id="lsti0195"><span class="elsevierStyleLabel">-</span><p id="par0275" class="elsevierStylePara elsevierViewall">All increases in NP levels should be interpreted&#44; not only as support for the diagnosis but also as an &#8220;alarm signal&#8221; that provides short to medium-term risk information&#44; supplementing clinical judgment&#46;<a class="elsevierStyleCrossRefs" href="#bib0195"><span class="elsevierStyleSup">3&#44;4&#44;26</span></a></p></li><li class="elsevierStyleListItem" id="lsti0200"><span class="elsevierStyleLabel">-</span><p id="par0280" class="elsevierStylePara elsevierViewall">In any clinical scenario&#44; the greater the NP concentration&#44; the greater the risk of complications and poorer the clinical outcome&#46;</p></li><li class="elsevierStyleListItem" id="lsti0205"><span class="elsevierStyleLabel">-</span><p id="par0285" class="elsevierStylePara elsevierViewall">The usefulness of NPs for assessing the prognosis is mainly applied to patients with HF&#46; However&#44; it should be noted that the presence of high concentrations in other diseases&#44; as a marker of stress and cardiac damage&#44; also identifies a greater cardiovascular risk&#46;</p></li><li class="elsevierStyleListItem" id="lsti0210"><span class="elsevierStyleLabel">-</span><p id="par0290" class="elsevierStylePara elsevierViewall">The measurement of NPs as a risk assessment tool should not be performed routinely but rather as support for clinical judgment&#44; restricted to patients for whom the information provided affects the making of decisions regarding therapy&#46;</p></li></ul></p><p id="par0295" class="elsevierStylePara elsevierViewall"><span class="elsevierStyleItalic">B&#46;1&#46;</span> For patients in emergency departments or who are hospitalized&#44; the same criteria of the previous section are applicable&#46; The following conditions can also justify the use of NPs&#58;<ul class="elsevierStyleList" id="lis0040"><li class="elsevierStyleListItem" id="lsti0215"><span class="elsevierStyleLabel">-</span><p id="par0300" class="elsevierStylePara elsevierViewall">Patients with questions regarding the decision to hospitalize&#46;</p></li><li class="elsevierStyleListItem" id="lsti0220"><span class="elsevierStyleLabel">-</span><p id="par0305" class="elsevierStylePara elsevierViewall">Patients with questions concerning the degree of care and hospital unit&#46;</p></li><li class="elsevierStyleListItem" id="lsti0225"><span class="elsevierStyleLabel">-</span><p id="par0310" class="elsevierStylePara elsevierViewall">Patients with questions as to the use or withdrawal of devices or circulatory support therapies&#46;</p></li></ul></p><p id="par0315" class="elsevierStylePara elsevierViewall">The following should be considered when interpreting the results&#58;<ul class="elsevierStyleList" id="lis0045"><li class="elsevierStyleListItem" id="lsti0230"><span class="elsevierStyleLabel">-</span><p id="par0320" class="elsevierStylePara elsevierViewall">Absolute values of NT-proBNP greater than 5000<span class="elsevierStyleHsp" style=""></span>pg&#47;mL are associated with a greater risk of severe complications&#46; The higher the NP concentration&#44; the poorer the prognosis&#46;<a class="elsevierStyleCrossRefs" href="#bib0240"><span class="elsevierStyleSup">12&#44;27&#44;28</span></a></p></li><li class="elsevierStyleListItem" id="lsti0235"><span class="elsevierStyleLabel">-</span><p id="par0325" class="elsevierStylePara elsevierViewall">In the presence of very high NP concentrations but lacking signs of HF&#44; the possibility should always be considered of a severe cardiovascular stress condition not attributable to HF &#40;<span class="elsevierStyleItalic">e&#46;g&#46;</span>&#44; sepsis and pulmonary thromboembolism&#41;&#46;</p></li></ul></p><p id="par0330" class="elsevierStylePara elsevierViewall"><span class="elsevierStyleItalic">B&#46;2</span>&#46; For patients in outpatient consultations&#44; the following conditions could justify measuring NPs&#58;<ul class="elsevierStyleList" id="lis0050"><li class="elsevierStyleListItem" id="lsti0240"><span class="elsevierStyleLabel">-</span><p id="par0335" class="elsevierStylePara elsevierViewall">Patients with chronic HF with questions concerning the criteria for referral to specialists&#44; emergency department or hospitalization&#46;</p></li><li class="elsevierStyleListItem" id="lsti0245"><span class="elsevierStyleLabel">-</span><p id="par0340" class="elsevierStylePara elsevierViewall">Patients seen in advanced HF consultations for the decision-making process for therapy&#44; especially regarding the indication for heart transplantation and device implantation&#46;</p></li></ul></p><p id="par0345" class="elsevierStylePara elsevierViewall">The following should be considered when interpreting the results&#58;<ul class="elsevierStyleList" id="lis0055"><li class="elsevierStyleListItem" id="lsti0250"><span class="elsevierStyleLabel">-</span><p id="par0350" class="elsevierStylePara elsevierViewall">Values above 1000<span class="elsevierStyleHsp" style=""></span>pg&#47;mL for NT-proBNP indicate an increased risk of death or hospitalization&#46;<a class="elsevierStyleCrossRef" href="#bib0325"><span class="elsevierStyleSup">29</span></a> The increase in risk is linear&#59; the higher the concentration&#44; the higher the risk&#46;</p></li><li class="elsevierStyleListItem" id="lsti0255"><span class="elsevierStyleLabel">-</span><p id="par0355" class="elsevierStylePara elsevierViewall">Any value should be interpreted in the clinical context&#44; taking into account modifiers such as age and comorbidity&#46;</p></li></ul></p></span><span id="sec0045" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="sect0065">C&#46; Follow-up and treatment</span><p id="par0360" class="elsevierStylePara elsevierViewall">The use of NPs as a tool for guiding medical treatment has been evaluated primarily in the outpatient setting and following hospitalization&#46; The results have been conflicting&#44; although the meta-analyses suggest its usefulness for optimizing drug treatment and reducing adverse events&#46;<a class="elsevierStyleCrossRefs" href="#bib0330"><span class="elsevierStyleSup">30&#44;31</span></a></p><p id="par0365" class="elsevierStylePara elsevierViewall">The following items are proposed as general recommendations for its use as a treatment guideline&#58;<ul class="elsevierStyleList" id="lis0060"><li class="elsevierStyleListItem" id="lsti0260"><span class="elsevierStyleLabel">-</span><p id="par0370" class="elsevierStylePara elsevierViewall">The usefulness of NPs has been mainly demonstrated in patients younger than 75 years with systolic dysfunction&#46; Given that these studies were performed in HF units&#44; this use should only be considered in this context and by trained personnel&#46;<a class="elsevierStyleCrossRefs" href="#bib0330"><span class="elsevierStyleSup">30&#44;31</span></a></p></li><li class="elsevierStyleListItem" id="lsti0265"><span class="elsevierStyleLabel">-</span><p id="par0375" class="elsevierStylePara elsevierViewall">Repeated NP measurements may also be assessed in specific circumstances&#44; for decision making within protocols and as support for the clinical judgment&#46;</p></li></ul></p><p id="par0380" class="elsevierStylePara elsevierViewall">The measurement of NP concentrations should not be requested routinely as a follow-up tool and treatment guideline&#46; This use should instead be performed under specific clinical considerations and scenarios&#46;</p><p id="par0385" class="elsevierStylePara elsevierViewall"><span class="elsevierStyleItalic">C&#46;1&#46;</span> The following recommendations have been established for patients hospitalized for exacerbated HF&#58;<ul class="elsevierStyleList" id="lis0065"><li class="elsevierStyleListItem" id="lsti0270"><span class="elsevierStyleLabel">-</span><p id="par0390" class="elsevierStylePara elsevierViewall">For the serial use of NPs&#44; a value at admission needs to be obtained &#40;during the first 24<span class="elsevierStyleHsp" style=""></span>h of hospitalization&#41; because their changes should be interpreted in terms of a relative reduction compared to the initial value&#46;</p></li><li class="elsevierStyleListItem" id="lsti0275"><span class="elsevierStyleLabel">-</span><p id="par0395" class="elsevierStylePara elsevierViewall">The reduction in NP levels in relative terms has greater usefulness than in absolute terms&#59; a 30&#37; reduction represents the threshold that has been associated with a better outcome&#46;<a class="elsevierStyleCrossRef" href="#bib0340"><span class="elsevierStyleSup">32</span></a></p></li><li class="elsevierStyleListItem" id="lsti0280"><span class="elsevierStyleLabel">-</span><p id="par0400" class="elsevierStylePara elsevierViewall">Their measurement as a therapy guideline&#44; at intermediate times between admission and discharge&#44; is not justified and should be restricted to specific conditions&#44; such as diuretic adjustment to resolve congestion&#46;</p></li><li class="elsevierStyleListItem" id="lsti0285"><span class="elsevierStyleLabel">-</span><p id="par0405" class="elsevierStylePara elsevierViewall">Their serial measurement should not be performed to determine when the patient should be discharged&#46; However&#44; they can support the clinical judgment of discharge&#44; when the progress of the concentrations is considered&#46;</p></li></ul></p><p id="par0410" class="elsevierStylePara elsevierViewall"><span class="elsevierStyleItalic">C&#46;2&#46;</span> In the follow-up of outpatients with HF&#44; NP measurement is recommended within specialized HF units or consultations to&#8230;<ul class="elsevierStyleList" id="lis0070"><li class="elsevierStyleListItem" id="lsti0290"><span class="elsevierStyleLabel">-</span><p id="par0415" class="elsevierStylePara elsevierViewall">Confirm the decompensations&#46; NPs can help confirm the presence of decompensation in cases that have reasonable clinical uncertainty&#46;<a class="elsevierStyleCrossRef" href="#bib0345"><span class="elsevierStyleSup">33</span></a></p></li><li class="elsevierStyleListItem" id="lsti0295"><span class="elsevierStyleLabel">-</span><p id="par0420" class="elsevierStylePara elsevierViewall">Optimize medical treatment&#46; NPs can help optimize drug treatment&#44; based on the objective of achieving an NT-proBNP level less than 1000<span class="elsevierStyleHsp" style=""></span>pg&#47;mL&#46;<a class="elsevierStyleCrossRef" href="#bib0350"><span class="elsevierStyleSup">34</span></a> There are no BNP data for this use&#46;</p></li><li class="elsevierStyleListItem" id="lsti0300"><span class="elsevierStyleLabel">-</span><p id="par0425" class="elsevierStylePara elsevierViewall">In nonspecialized consultations&#44; their use should be limited to confirming decompensations in patients who have a value measured in a stable clinical situation&#46;</p></li></ul></p></span><span id="sec0050" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="sect0070">D&#46; Continuity of care</span><p id="par0430" class="elsevierStylePara elsevierViewall">NPs offer relevant information for the various professionals involved in caring for patients with HF during their progression&#44; which can vary&#46; The chronic character and complexity of HF entails the involvement of multidisciplinary teams&#44; thus the importance of contextualizing the NP concentrations of each patient at each developmental stage&#46; It is therefore recommended that&#8230;<ul class="elsevierStyleList" id="lis0075"><li class="elsevierStyleListItem" id="lsti0305"><span class="elsevierStyleLabel">-</span><p id="par0435" class="elsevierStylePara elsevierViewall">the medical history and medical reports reflect how many NP values are obtained at all points of the disease progression&#46;</p></li><li class="elsevierStyleListItem" id="lsti0310"><span class="elsevierStyleLabel">-</span><p id="par0440" class="elsevierStylePara elsevierViewall">the discharge report includes all values obtained during hospitalization&#46;</p></li></ul></p></span></span><span id="sec0055" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="sect0075">Conclusions and final recommendations</span><p id="par0445" class="elsevierStylePara elsevierViewall"><ul class="elsevierStyleList" id="lis0080"><li class="elsevierStyleListItem" id="lsti0315"><span class="elsevierStyleLabel">&#40;1&#41;</span><p id="par0450" class="elsevierStylePara elsevierViewall">NPs are diagnostic and prognostic tools with demonstrated usefulness and should therefore be available in all healthcare settings&#44; both in primary care and specialized care&#44; for use based on medical criteria&#46;</p></li><li class="elsevierStyleListItem" id="lsti0320"><span class="elsevierStyleLabel">&#40;2&#41;</span><p id="par0455" class="elsevierStylePara elsevierViewall">Their proper use requires that medical professionals receive sufficient training in the prelaboratory &#40;pathophysiology&#41;&#44; laboratory &#40;measurement methods&#41; and postlaboratory &#40;interpretation in the clinical context&#41; phases&#46;</p></li><li class="elsevierStyleListItem" id="lsti0325"><span class="elsevierStyleLabel">&#40;3&#41;</span><p id="par0460" class="elsevierStylePara elsevierViewall">Their efficient use requires their inclusion in consensus clinical protocols by all involved medical professionals &#40;emergency department&#44; specialized care&#44; primary care and laboratory&#41;&#46;</p></li><li class="elsevierStyleListItem" id="lsti0330"><span class="elsevierStyleLabel">&#40;4&#41;</span><p id="par0465" class="elsevierStylePara elsevierViewall">Their measurement is recommended for diagnosing HF in all patients with dyspnea who are admitted to the emergency department and who have no prior diagnosis of HF&#46;</p></li><li class="elsevierStyleListItem" id="lsti0335"><span class="elsevierStyleLabel">&#40;5&#41;</span><p id="par0470" class="elsevierStylePara elsevierViewall">Their measurement is recommended in outpatient consultations at the physician&#39;s discretion&#44; as an aid in the diagnosis of HF when there are questions concerning the diagnosis or when there is no prior diagnosis&#46; The evidence for this recommendation is greater if echocardiography is not available early on&#46;</p></li><li class="elsevierStyleListItem" id="lsti0340"><span class="elsevierStyleLabel">&#40;6&#41;</span><p id="par0475" class="elsevierStylePara elsevierViewall">Whenever the concentrations are measured&#44; they should be interpreted as a quantitative risk marker of death and unfavorable outcomes&#46; This information should be used in risk stratification as a supplement to the clinical assessment&#46;</p></li><li class="elsevierStyleListItem" id="lsti0345"><span class="elsevierStyleLabel">&#40;7&#41;</span><p id="par0480" class="elsevierStylePara elsevierViewall">In patients previously diagnosed with HF&#44; the request for NP measurement for the diagnosis of decompensation or as a prognostic marker <span class="elsevierStyleItalic">per se</span> is only recommended in those conditions in which the results help the clinical or therapeutic decision-making process&#46;</p></li><li class="elsevierStyleListItem" id="lsti0350"><span class="elsevierStyleLabel">&#40;8&#41;</span><p id="par0485" class="elsevierStylePara elsevierViewall">Their serial measurement or as a therapeutic guideline for patients with an established diagnosis of HF should not be performed routinely but instead should follow consensus clinical protocols or be restricted to specific HF units&#46;</p></li><li class="elsevierStyleListItem" id="lsti0355"><span class="elsevierStyleLabel">&#40;9&#41;</span><p id="par0490" class="elsevierStylePara elsevierViewall">Their usefulness in the continuity of care is unquestionable&#46; The results of the measurements should therefore always be reflected in the medical history&#44; the discharge report and the patient follow-up&#46;</p></li><li class="elsevierStyleListItem" id="lsti0360"><span class="elsevierStyleLabel">&#40;10&#41;</span><p id="par0495" class="elsevierStylePara elsevierViewall">Interaction between all involved professionals&#44; clinicians and laboratory staff is recommended&#44; which will result in joint training activities and improvements in the healthcare organization for the use of NPs&#46;</p></li></ul></p></span><span id="sec0060" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="sect0080">Conflicts of interest</span><p id="par0500" class="elsevierStylePara elsevierViewall">Jordi Ordo&#241;ez-Llanos declares having received support for research and attendance at conferences and payments as a speaker and member of the advisory committees of the major companies that market tests for measuring natriuretic peptides&#46;</p><p id="par0505" class="elsevierStylePara elsevierViewall">Antoni Bay&#233;s-Genis declares having received support for research and attendance at conferences and payments as a speaker by Roche Diagnostics&#46;</p><p id="par0510" class="elsevierStylePara elsevierViewall">D&#46; Pascual-Figal declares having received support for research from Roche Diagnostics and bioMerieux&#46;</p><p id="par0515" class="elsevierStylePara elsevierViewall">The other authors declare that they have no conflicts of interest&#46;</p></span></span>"
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        "resumen" => "<span id="abst0005" class="elsevierStyleSection elsevierViewall"><p id="spar0005" class="elsevierStyleSimplePara elsevierViewall">Natriuretic peptides are a useful laboratory tool for the diagnosis&#44; prognosis and treatment of patients with heart failure&#46; Natriuretic peptides are used in various healthcare settings &#40;consultations&#44; emergency department&#44; hospitalization&#44; laboratory&#41; and by various primary care and specialized professionals&#46; However&#44; their use in clinical practice is still scare and uneven&#46; Properly using and interpreting natriuretic peptides in clinical practice requires a minimum of prelaboratory &#40;pathophysiology&#41;&#44; laboratory &#40;methods&#41; and postlaboratory &#40;interpretation and integration of clinical data&#41; expertise&#46; The objective of this consensus document&#44; developed by several scientific societies&#44; is to update the necessary concepts and expertise on natriuretic peptides that enable its application in the diagnosis&#44; prognosis and treatment of heart failure&#44; in various healthcare environments&#46;</p></span>"
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        "resumen" => "<span id="abst0010" class="elsevierStyleSection elsevierViewall"><p id="spar0010" class="elsevierStyleSimplePara elsevierViewall">Los p&#233;ptidos natriur&#233;ticos son una herramienta de laboratorio &#250;til en el diagn&#243;stico&#44; pron&#243;stico y tratamiento de los pacientes con insuficiencia cardiaca&#46; Su uso involucra a diferentes &#225;mbitos sanitarios &#40;consultas&#44; urgencias&#44; hospitalizaci&#243;n&#44; laboratorio&#41; y a muy diferentes profesionales de la Atenci&#243;n Primaria o especializada&#46; Sin embargo&#44; su incorporaci&#243;n a la pr&#225;ctica asistencial a&#250;n es escasa y desigual&#46; Para un correcto uso e interpretaci&#243;n en la pr&#225;ctica cl&#237;nica se necesita un m&#237;nimo de conocimientos preanal&#237;ticos &#40;fisiopatolog&#237;a&#41;&#44; anal&#237;ticos &#40;m&#233;todos&#41; y postanal&#237;ticos &#40;interpretaci&#243;n e integraci&#243;n con los datos cl&#237;nicos&#41;&#46; Este documento de consenso elaborado por varias sociedades cient&#237;ficas tiene como objetivo actualizar los conceptos y conocimientos necesarios sobre los p&#233;ptidos natriur&#233;ticos que permitan su aplicaci&#243;n para el diagn&#243;stico&#44; pron&#243;stico y tratamiento de la insuficiencia cardiaca&#44; en los diferentes &#225;mbitos sanitarios&#46;</p></span>"
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        "nota" => "<p class="elsevierStyleNotepara" id="npar0015">Please cite this article as&#58; Pascual-Figal DA&#44; Casademont J&#44; Lobos JM&#44; Pi&#241;era P&#44; Bay&#233;s-Genis A&#44; Ord&#243;&#241;ez-Llanos J&#44; et al&#46; Documento de consenso y recomendaciones sobre el uso de los p&#233;ptidos natriur&#233;ticos en la pr&#225;ctica cl&#237;nica&#46; Rev Clin Esp&#46; 2016&#59;216&#58;313&#8211;322&#46;</p>"
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        "descripcion" => array:1 [
          "en" => "<p id="spar0015" class="elsevierStyleSimplePara elsevierViewall">Diagram of the BNP production mechanism and natriuretic peptide receptor function&#46; <span class="elsevierStyleItalic">Abbreviations</span>&#58; ANP&#44; A or atrial natriuretic peptide&#59; BNP&#44; B or brain natriuretic peptide&#59; CNP&#44; C natriuretic peptide&#59; GMP&#44; guanosine monophosphate&#59; GTP&#58; guanosine triphosphate&#59; NPR&#44; natriuretic peptide receptor&#46;</p>"
        ]
      ]
      1 => array:8 [
        "identificador" => "tbl0005"
        "etiqueta" => "Table 1"
        "tipo" => "MULTIMEDIATABLA"
        "mostrarFloat" => true
        "mostrarDisplay" => false
        "detalles" => array:1 [
          0 => array:3 [
            "identificador" => "at1"
            "detalle" => "Table "
            "rol" => "short"
          ]
        ]
        "tabla" => array:3 [
          "leyenda" => "<p id="spar0025" class="elsevierStyleSimplePara elsevierViewall">The BNP values in the second column correspond with those observed in the same population of individuals evaluated with the various methods&#46;<a class="elsevierStyleCrossRefs" href="#bib0355"><span class="elsevierStyleSup">35&#44;36</span></a> The results are expressed as median &#40;interquartile range&#41;<a class="elsevierStyleCrossRef" href="#bib0355"><span class="elsevierStyleSup">35</span></a> or mean<span class="elsevierStyleHsp" style=""></span>&#177;<span class="elsevierStyleHsp" style=""></span>standard deviation&#46;<a class="elsevierStyleCrossRef" href="#bib0360"><span class="elsevierStyleSup">36</span></a></p>"
          "tablatextoimagen" => array:1 [
            0 => array:2 [
              "tabla" => array:1 [
                0 => """
                  <table border="0" frame="\n
                  \t\t\t\t\tvoid\n
                  \t\t\t\t" class=""><thead title="thead"><tr title="table-row"><th class="td" title="table-head  " align="left" valign="top" scope="col" style="border-bottom: 2px solid black">BNP<br>Instrumentation company&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</th><th class="td" title="table-head  " colspan="2" align="center" valign="top" scope="col" style="border-bottom: 2px solid black">BNP &#40;pg&#47;mL&#41;<a class="elsevierStyleCrossRefs" href="#bib0355"><span class="elsevierStyleSup">35&#44;36</span></a></th><th class="td" title="table-head  " align="left" valign="top" scope="col" style="border-bottom: 2px solid black">Capture antibody &#40;aa of the epitope&#41;&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</th><th class="td" title="table-head  " align="left" valign="top" scope="col" style="border-bottom: 2px solid black">Detection antibody &#40;aa of the epitope&#41;&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</th><th class="td" title="table-head  " align="left" valign="top" scope="col" style="border-bottom: 2px solid black">Standard employed to calibrate the method&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</th></tr></thead><tbody title="tbody"><tr title="table-row"><td class="td-with-role" title="table-entry ; entry_with_role_rowhead " align="left" valign="top">Alere<a class="elsevierStyleCrossRef" href="#tblfn0005"><span class="elsevierStyleSup">a</span></a><br>Triage&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="char" valign="top">413 &#40;5&#8211;2&#46;170&#41;&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="char" valign="top">133<span class="elsevierStyleHsp" style=""></span>&#177;<span class="elsevierStyleHsp" style=""></span>10&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="left" valign="top">Monoclonal<br>&#40;5&#8211;13&#41;&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="left" valign="top">Omniclonal&#44; uncharacterized epitope&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="left" valign="top">Recombinant BNP&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td></tr><tr title="table-row"><td class="td-with-role" title="table-entry ; entry_with_role_rowhead " align="left" valign="top">Abbott<br>Architect<br>AxSYM<br>iSTAT&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="char" valign="top">526 &#40;13&#8211;3&#46;065&#41;&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="" valign="top">&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="left" valign="top">Monoclonal<br>&#40;5&#8211;13&#41;&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="left" valign="top">Monoclonal<br>&#40;26&#8211;32&#41;&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="left" valign="top">Synthetic BNP&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td></tr><tr title="table-row"><td class="td-with-role" title="table-entry ; entry_with_role_rowhead " align="left" valign="top">Beckman Coulter<br>Access&#44; Access 2<br>DxL&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="char" valign="top">464 &#40;18&#8211;2&#46;166&#41;&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="" valign="top">&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="left" valign="top">Omniclonal&#44; uncharacterized epitope&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="left" valign="top">Monoclonal<br>&#40;5&#8211;13&#41;&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="left" valign="top">Recombinant BNP&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td></tr><tr title="table-row"><td class="td-with-role" title="table-entry ; entry_with_role_rowhead " align="left" valign="top">Siemens<br>ACS 180<br>Advia Centaur<br>Advia Centaur CP<br>Advia Centaur XP&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="char" valign="top">315 &#40;11&#8211;1&#46;884&#41;&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="char" valign="top">114<span class="elsevierStyleHsp" style=""></span>&#177;<span class="elsevierStyleHsp" style=""></span>2&#46;9&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="left" valign="top">Monoclonal &#40;27&#8211;32&#41;&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="left" valign="top">Monoclonal<br>&#40;14&#8211;21&#41;&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="left" valign="top">Synthetic BNP&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td></tr><tr title="table-row"><td class="td-with-role" title="table-entry ; entry_with_role_rowhead " align="left" valign="top">Siemens<br>Dimension VISTA&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="" valign="top">&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="char" valign="top">108<span class="elsevierStyleHsp" style=""></span>&#177;<span class="elsevierStyleHsp" style=""></span>1&#46;95&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="left" valign="top">Monoclonal<br>&#40;14&#8211;21&#41;&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="left" valign="top">Monoclonal<br>&#40;27&#8211;32&#41;&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="left" valign="top">Synthetic BNP&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td></tr></tbody></table>
                  """
              ]
              "imagenFichero" => array:1 [
                0 => "xTab1167742.png"
              ]
            ]
          ]
          "notaPie" => array:1 [
            0 => array:3 [
              "identificador" => "tblfn0005"
              "etiqueta" => "a"
              "nota" => "<p class="elsevierStyleNotepara" id="npar0005">This method is taken as a reference because it was employed to obtain the clinical decision limits in the BNP study&#46;<a class="elsevierStyleCrossRef" href="#bib0260"><span class="elsevierStyleSup">16</span></a></p>"
            ]
          ]
        ]
        "descripcion" => array:1 [
          "en" => "<p id="spar0020" class="elsevierStyleSimplePara elsevierViewall">Characteristics of the methods for measuring BNP&#44; including the antibodies used&#44; the compound&#39;s epitopes recognized by the antibodies and the standard employed to calibrate the method&#46;</p>"
        ]
      ]
      2 => array:8 [
        "identificador" => "tbl0010"
        "etiqueta" => "Table 2"
        "tipo" => "MULTIMEDIATABLA"
        "mostrarFloat" => true
        "mostrarDisplay" => false
        "detalles" => array:1 [
          0 => array:3 [
            "identificador" => "at2"
            "detalle" => "Table "
            "rol" => "short"
          ]
        ]
        "tabla" => array:3 [
          "leyenda" => "<p id="spar0035" class="elsevierStyleSimplePara elsevierViewall">The NT-proBNP values in the second column correspond to the mean and 2 standard deviations of the same serum for quality control of the Spanish Society of Clinical Chemistry and Molecular Pathology &#40;SEQC&#41; assayed repeatedly by the various methods in various clinical laboratories&#46; The methods with no NT-proBNP values were not used in any participating laboratory &#40;<span class="elsevierStyleItalic">n</span><span class="elsevierStyleHsp" style=""></span>&#61;<span class="elsevierStyleHsp" style=""></span>123&#41; in the Quality Control Program&#46;</p>"
          "tablatextoimagen" => array:1 [
            0 => array:2 [
              "tabla" => array:1 [
                0 => """
                  <table border="0" frame="\n
                  \t\t\t\t\tvoid\n
                  \t\t\t\t" class=""><thead title="thead"><tr title="table-row"><th class="td" title="table-head  " align="left" valign="top" scope="col" style="border-bottom: 2px solid black">NT-proBNP<br>Instrumentation company&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</th><th class="td" title="table-head  " align="left" valign="top" scope="col" style="border-bottom: 2px solid black">NT-proBNP &#40;pg&#47;mL&#41;&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</th><th class="td" title="table-head  " align="left" valign="top" scope="col" style="border-bottom: 2px solid black">Capture antibody &#40;aa of the epitope&#41;&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</th><th class="td" title="table-head  " align="left" valign="top" scope="col" style="border-bottom: 2px solid black">Detection antibody &#40;aa of the epitope&#41;&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</th><th class="td" title="table-head  " align="left" valign="top" scope="col" style="border-bottom: 2px solid black">Standard employed to calibrate the method&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</th></tr></thead><tbody title="tbody"><tr title="table-row"><td class="td-with-role" title="table-entry ; entry_with_role_rowhead " align="left" valign="top"><span class="elsevierStyleItalic">Roche Diagnostics</span><a class="elsevierStyleCrossRef" href="#tblfn0010"><span class="elsevierStyleSup">a</span></a>&#59; Modular E170&#44; Cobas e601&#44; e602&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="left" valign="top">116<span class="elsevierStyleHsp" style=""></span>&#177;<span class="elsevierStyleHsp" style=""></span>6&#46;7&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="left" valign="top">Monoclonal<br>&#40;27&#8211;31&#41;&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="left" valign="top">Monoclonal<br>&#40;42&#8211;46&#41;&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="left" valign="top">Synthetic NT-proBNP aa 1&#8211;76&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td></tr><tr title="table-row"><td class="td-with-role" title="table-entry ; entry_with_role_rowhead " align="left" valign="top"><span class="elsevierStyleItalic">Alere</span>&#59; Triage&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="" valign="top">&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="left" valign="top">Monoclonal<br>&#40;27&#8211;31&#41;&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="left" valign="top">Monoclonal<br>&#40;42&#8211;46&#41;&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="left" valign="top">Synthetic NT-proBNP aa 1&#8211;76&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td></tr><tr title="table-row"><td class="td-with-role" title="table-entry ; entry_with_role_rowhead " align="left" valign="top"><span class="elsevierStyleItalic">bioMerieux</span>&#59; VIDAS&#44; MiniVIDAS&#44; VIDAS 3&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="left" valign="top">86&#46;5<span class="elsevierStyleHsp" style=""></span>&#177;<span class="elsevierStyleHsp" style=""></span>11&#46;5&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="left" valign="top">Monoclonal<br>&#40;27&#8211;31&#41;&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="left" valign="top">Monoclonal<br>&#40;42&#8211;46&#41;&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="left" valign="top">Synthetic NT-proBNP aa 1&#8211;76&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td></tr><tr title="table-row"><td class="td-with-role" title="table-entry ; entry_with_role_rowhead " align="left" valign="top"><span class="elsevierStyleItalic">Mitsubishi Chemical</span>&#59; PATHFAST&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="" valign="top">&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="left" valign="top">Polyclonal<br>&#40;1&#8211;21&#41;&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="left" valign="top">Polyclonal<br>&#40;39&#8211;50&#41;&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="left" valign="top">Synthetic NT-proBNP aa 1&#8211;76&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td></tr><tr title="table-row"><td class="td-with-role" title="table-entry ; entry_with_role_rowhead " align="left" valign="top"><span class="elsevierStyleItalic">Nanogen LifeSign</span>&#59; DXpress Reader&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="" valign="top">&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="left" valign="top">Monoclonal<span class="elsevierStyleHsp" style=""></span>&#43;<span class="elsevierStyleHsp" style=""></span>polyclonal&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="left" valign="top">Polyclonal&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="left" valign="top">Synthetic NT-proBNP aa 1&#8211;76&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td></tr><tr title="table-row"><td class="td-with-role" title="table-entry ; entry_with_role_rowhead " align="left" valign="top"><span class="elsevierStyleItalic">Ortho Clinical Diagnostics</span>&#59; Vitros ECi 3600&#44; 5600&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="left" valign="top">226<span class="elsevierStyleHsp" style=""></span>&#177;<span class="elsevierStyleHsp" style=""></span>8&#46;7&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="left" valign="top">Polyclonal<br>&#40;1&#8211;21&#41;&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="left" valign="top">Polyclonal<br>&#40;39&#8211;50&#41;&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="left" valign="top">Synthetic NT-proBNP aa 1&#8211;76&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td></tr><tr title="table-row"><td class="td-with-role" title="table-entry ; entry_with_role_rowhead " align="left" valign="top"><span class="elsevierStyleItalic">Radiometer</span>&#59; AQT90 FLEX&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="left" valign="top">224<span class="elsevierStyleHsp" style=""></span>&#177;<span class="elsevierStyleHsp" style=""></span>7&#46;9&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="left" valign="top">Polyclonal<br>&#40;1&#8211;21&#41;&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="left" valign="top">Polyclonal<br>&#40;39&#8211;50&#41;&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="left" valign="top">Synthetic NT-proBNP aa 1&#8211;76&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td></tr><tr title="table-row"><td class="td-with-role" title="table-entry ; entry_with_role_rowhead " align="left" valign="top"><span class="elsevierStyleItalic">Response Biomedical</span>&#59; RAMP&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="" valign="top">&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="left" valign="top">Monoclonal<br>&#40;27&#8211;31&#41;&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="left" valign="top">Polyclonal<br>&#40;39&#8211;50&#41;&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="left" valign="top">Synthetic NT-proBNP aa 1&#8211;76&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td></tr><tr title="table-row"><td class="td-with-role" title="table-entry ; entry_with_role_rowhead " align="left" valign="top"><span class="elsevierStyleItalic">Roche Diagnostics</span>&#59;<br>Elecsys 2010&#44; Cobas e411<br>Cobas e601&#44; e602&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="left" valign="top">91<span class="elsevierStyleHsp" style=""></span>&#177;<span class="elsevierStyleHsp" style=""></span>7&#46;1<br>118<span class="elsevierStyleHsp" style=""></span>&#177;<span class="elsevierStyleHsp" style=""></span>9&#46;3&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="left" valign="top">Monoclonal<br>&#40;27&#8211;31&#41;&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="left" valign="top">Monoclonal<br>&#40;42&#8211;46&#41;&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="left" valign="top">Synthetic NT-proBNP aa 1&#8211;76&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td></tr><tr title="table-row"><td class="td-with-role" title="table-entry ; entry_with_role_rowhead " align="left" valign="top"><span class="elsevierStyleItalic">Siemens</span><br>Dimension RxL&#44; Xpand Dimension VISTA&#44; Dimension EXL<br>Stratus CS&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="left" valign="top">58<span class="elsevierStyleHsp" style=""></span>&#177;<span class="elsevierStyleHsp" style=""></span>9&#46;9<br>110<span class="elsevierStyleHsp" style=""></span>&#177;<span class="elsevierStyleHsp" style=""></span>3&#46;3<br>75<span class="elsevierStyleHsp" style=""></span>&#177;<span class="elsevierStyleHsp" style=""></span>6&#46;2<br>220<span class="elsevierStyleHsp" style=""></span>&#177;<span class="elsevierStyleHsp" style=""></span>4&#46;5&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="left" valign="top">Monoclonal &#40;22&#8211;28&#41;&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="left" valign="top">Monoclonal<br>&#40;42&#8211;46&#41;&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="left" valign="top">Synthetic NT-proBNP aa 1&#8211;76&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td></tr><tr title="table-row"><td class="td-with-role" title="table-entry ; entry_with_role_rowhead " align="left" valign="top"><span class="elsevierStyleItalic">Siemens</span><br>Immulite 1000&#44; 2000&#44; 2500&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="left" valign="top">401&#46;5<span class="elsevierStyleHsp" style=""></span>&#177;<span class="elsevierStyleHsp" style=""></span>7&#46;8&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="left" valign="top">Polyclonal<br>&#40;1&#8211;21&#41;&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="left" valign="top">Polyclonal<br>&#40;39&#8211;50&#41;&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="left" valign="top">Synthetic NT-proBNP aa 1&#8211;76&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td></tr></tbody></table>
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          "en" => "<p id="spar0030" class="elsevierStyleSimplePara elsevierViewall">Characteristics of the Methods for Measuring NT-proBNP&#44; including the antibodies used&#44; the compound&#39;s epitopes recognized by the antibodies and the standard employed to calibrate the method&#46;</p>"
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                  \t\t\t\t</th></tr></thead><tbody title="tbody"><tr title="table-row"><td class="td" title="table-entry  " rowspan="3" align="left" valign="top">Emergency Department</td><td class="td" title="table-entry  " align="left" valign="top">&#60;300&nbsp;\t\t\t\t\t\t\n
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                  \t\t\t\t</td><td class="td" title="table-entry  " align="left" valign="top">HF very unlikely&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td></tr><tr title="table-row"><td class="td-with-role" title="table-entry ; entry_with_role_rowhead " align="left" valign="top">&#60;50 years&#58; 300&#8211;450<br>50&#8211;75 years&#58; 300&#8211;900<br>&#62;75 years&#58; 300&#8211;1800&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="char" valign="top">100&#8211;400&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="left" valign="top">Not determinative&#46; The clinical criterion of probability should predominate&#44; taking into account other situations&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td></tr><tr title="table-row"><td class="td-with-role" title="table-entry ; entry_with_role_rowhead " align="left" valign="top">&#60;50 years&#58; &#62;450<br>50&#8211;75 years&#58; &#62;900<br>&#62;75 years&#58; &#62;1800&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="char" valign="top">&#62;400&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="left" valign="top">HF with high probability&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td></tr><tr title="table-row"><td class="td" title="table-entry  " colspan="4" align="left" valign="top"><span class="elsevierStyleVsp" style="height:0.5px"></span></td></tr><tr title="table-row"><td class="td-with-role" title="table-entry ; entry_with_role_rowhead " align="left" valign="top">Outpatient&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="left" valign="top">&#60;125&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="char" valign="top">&#60;35&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="left" valign="top">HF very unlikely&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td></tr></tbody></table>
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          "en" => "<p id="spar0040" class="elsevierStyleSimplePara elsevierViewall">Reference NT-proBNP and BNP values for the diagnosis of heart failure&#46;</p>"
        ]
      ]
    ]
    "bibliografia" => array:2 [
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Original language: English
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