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    "textoCompleto" => "<span class="elsevierStyleSections"><p id="par0005" class="elsevierStylePara elsevierViewall"><elsevierMultimedia ident="tb0005"></elsevierMultimedia></p><span id="sec0015" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="sect0075">Background</span><p id="par0025" class="elsevierStylePara elsevierViewall">Coronary artery disease &#40;CAD&#41; remains the leading cause of death in Western industrialized countries despite the results of prevention strategies&#46;<a class="elsevierStyleCrossRef" href="#bib0005"><span class="elsevierStyleSup">1</span></a> Given that approximately 50&#37; of deaths from a coronary origin occur in asymptomatic patients&#44; the early detection of individuals at risk of cardiovascular events is crucial for establishing an adequate prevention of CAD&#46;<a class="elsevierStyleCrossRef" href="#bib0010"><span class="elsevierStyleSup">2</span></a> The most frequently used stratification tools are cardiovascular risk scales such as the Framingham Risk Score and the European Systematic Coronary Risk Evaluation &#40;SCORE&#41;&#46;<a class="elsevierStyleCrossRefs" href="#bib0015"><span class="elsevierStyleSup">3&#44;4</span></a> These risk scales have proven useful when applied to population groups but result in a limited estimation of individual risk&#46;<a class="elsevierStyleCrossRef" href="#bib0025"><span class="elsevierStyleSup">5</span></a> It is known that the conventional risk stratification models would not have identified up to 40&#37; of patients with a myocardial infarction&#46;<a class="elsevierStyleCrossRef" href="#bib0030"><span class="elsevierStyleSup">6</span></a> Therefore&#44; there is increasing interest in identifying more precise risk prediction strategies&#44; apart from the traditional risk factors&#46;</p><p id="par0030" class="elsevierStylePara elsevierViewall">The presence of coronary artery calcium &#40;CAC&#41; was demonstrated more than 15 years ago to be a sensitive marker for atherosclerosis&#44; even in subclinical stages&#46;<a class="elsevierStyleCrossRef" href="#bib0035"><span class="elsevierStyleSup">7</span></a> Subsequent meta-analyses confirmed the clear association of CAC&#44; its magnitude and progression with the clinical prognosis of CAD&#46;<a class="elsevierStyleCrossRefs" href="#bib0040"><span class="elsevierStyleSup">8&#8211;10</span></a> This analysis further showed the added predictive value of incorporating CAC into traditional stratification scales&#46;<a class="elsevierStyleCrossRef" href="#bib0055"><span class="elsevierStyleSup">11</span></a> These findings make the CAC score &#40;CACS&#41; a potential tool for improving vascular risk stratification and are particularly useful for the intermediate-risk population&#46;<a class="elsevierStyleCrossRef" href="#bib0060"><span class="elsevierStyleSup">12</span></a></p><p id="par0035" class="elsevierStylePara elsevierViewall">The objective of the current study was to analyze the CACS as an indicator of significant CAD in an asymptomatic Spanish population&#44; using noninvasive coronarography with multidetector computed tomography &#40;MDCT&#41; as a reference technique&#46;</p></span><span id="sec0020" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="sect0080">Methods</span><span id="sec0025" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="sect0085">Population selection</span><p id="par0040" class="elsevierStylePara elsevierViewall">The study comprised a retrospective series of 232 consecutive&#44; asymptomatic individuals&#44; without evidence of CAD&#44; referred for a MDCT in the context of a health checkup&#46; The patients were studied between the years 2004 and 2008&#46; Majority of the studies were conducted in the context of a company health checkup or comprised people who wanted an assessment of their own cardiovascular situation&#46; The following were considered inclusion criteria&#58; absence of heart disease&#44; absence of angina and symptoms that might correspond to an anginal equivalent&#46; The following were considered exclusion criteria&#58; allergy to iodinated contrast media&#44; nondialyzed renal insufficiency with a glomerular filtration rate &#60;30<span class="elsevierStyleHsp" style=""></span>mL&#47;min and a body mass index &#62;40<span class="elsevierStyleHsp" style=""></span>kg&#47;m<span class="elsevierStyleSup">2</span>&#46; All participants consented to the MDCT procedure after reading and signing the informed consent&#46; The cardiovascular risk factors considered for this study were gathered from the participants&#8217; previous clinical history&#46;</p></span><span id="sec0030" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="sect0090">Coronary multidetector computed tomography</span><p id="par0045" class="elsevierStylePara elsevierViewall">The CAC and MDCT protocols used for this study have been described in previous publications&#46;<a class="elsevierStyleCrossRef" href="#bib0055"><span class="elsevierStyleSup">11</span></a> The protocols also included the acquisition of noncontrast images &#40;coronary calcium study&#41; and a second acquisition with the concomitant administration of iodinated contrast media &#40;noninvasive coronarography&#41;&#46;</p></span><span id="sec0035" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="sect0095">Coronary calcium study</span><p id="par0050" class="elsevierStylePara elsevierViewall">The imaging study was conducted on a first-generation Toshiba<span class="elsevierStyleSup">&#174;</span> Aquilion 64 CT scanner &#40;Toshiba Corporation&#44; Medical Systems&#44; Otawara&#44; Japan&#41; with 64 detectors&#46; The study protocol started with performing a topogram to determine the limits of acquisition of cardiac volume&#44; which are generally delimited by the carina&#44; trachea and diaphragm&#46; The parameters of the administered radiation were adjusted in a conventional manner with respect to the morphological characteristics of each patient&#58; X-rays of 120<span class="elsevierStyleHsp" style=""></span>kV&#44; with a tube current between 250 and 400<span class="elsevierStyleHsp" style=""></span>mA&#46;</p><p id="par0055" class="elsevierStylePara elsevierViewall">The CAC study was performed according to the modified Agatston protocol&#46;<a class="elsevierStyleCrossRef" href="#bib0060"><span class="elsevierStyleSup">12</span></a></p></span><span id="sec0040" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="sect0100">Noninvasive coronarography</span><p id="par0060" class="elsevierStylePara elsevierViewall">The acquisition of cardiac volume images was performed using a continuous helical technique&#44; 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The adjustment between contrast media administration and image acquisition was performed automatically using a bolus-tracking system&#44; which detected the arrival of the contrast media in the region of interest situated within the ascending aorta&#46;</p><p id="par0070" class="elsevierStylePara elsevierViewall">After the acquisition&#44; the images were reconstructed with an interval of 0&#46;3<span class="elsevierStyleHsp" style=""></span>mm and with a temporal resolution of approximately 80<span class="elsevierStyleHsp" style=""></span>ms&#44; resulting in a cardiac volume comprising 350&#8211;400 anatomical sections&#46;</p></span><span id="sec0045" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="sect0105">Analysis of coronary multidetector tomography data</span><p id="par0075" class="elsevierStylePara elsevierViewall"><ul class="elsevierStyleList" id="lis0005"><li class="elsevierStyleListItem" id="lsti0005"><span class="elsevierStyleLabel">-</span><p id="par0080" class="elsevierStylePara elsevierViewall"><span class="elsevierStyleItalic">Coronary artery calcium score &#40;CACS&#41;</span>&#58; Coronary calcium was quantified on a workstation with specialized software &#40;Vitrea2<span class="elsevierStyleSup">&#174;</span>&#44; Vital images&#44; Plymouth&#44; MN&#44; USA&#41;&#46; CAC areas were identified as dense regions in the coronary artery that exceeded a threshold of 130<span class="elsevierStyleHsp" style=""></span>Hounsfield units &#40;HU&#41;&#46; The Agatston CACS was also quantified<a class="elsevierStyleCrossRef" href="#bib0065"><span class="elsevierStyleSup">13</span></a> for each patient as well as the population percentile for age and gender corresponding to this CACS&#46;<a class="elsevierStyleCrossRef" href="#bib0070"><span class="elsevierStyleSup">14</span></a></p></li><li class="elsevierStyleListItem" id="lsti0010"><span class="elsevierStyleLabel">-</span><p id="par0085" class="elsevierStylePara elsevierViewall"><span class="elsevierStyleItalic">Coronary multidetector tomography</span>&#58; The coronary anatomical study was conducted using maximum intensity projections&#44; multiplanar &#40;curved plane and transverse axis&#41; reconstruction and 3-D volume rendering&#46; Coronary segmentation followed a 17-segment model in accordance with the modified classification of the American Heart Association&#46;<a class="elsevierStyleCrossRef" href="#bib0075"><span class="elsevierStyleSup">15</span></a> Two expert observers &#40;one with more than 10 years of experience and the other with 4 years of experience&#41; reached a consensus and determined &#40;a&#41; the capacity for image interpretation and &#40;b&#41; the presence and magnitude of coronary stenotic lesions&#46; Lesions were considered significant if they were visually estimated to be larger than 50&#37;&#44; using as reference the contrasted area of the vessel lumen in the segments neighboring the stenosis&#46;</p></li></ul></p></span><span id="sec0050" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="sect0110">Statistical analysis</span><p id="par0090" class="elsevierStylePara elsevierViewall">The quantitative variables with a normal distribution were expressed as mean<span class="elsevierStyleHsp" style=""></span>&#177;<span class="elsevierStyleHsp" style=""></span>standard deviation &#40;SD&#41;&#44; variables with an asymmetric distribution were expressed as median &#40;with interquartile range&#41; and categorical variables were expressed as frequency &#40;percentage&#41;&#46; The differences between quartiles for the various clinical variables were analyzed using an analysis of variance &#40;ANOVA&#41;&#44; the Mann&#8211;Whitney <span class="elsevierStyleItalic">U</span> test &#40;for the continuous variables&#41; and Pearson&#39;s chi-squared test &#40;for the categorical variables&#41;&#46; The multivariate analysis to determine the independent predictors of significant CAC for MDCT was performed using a logistic regression model&#46; Statistical significance was set at <span class="elsevierStyleItalic">p</span><span class="elsevierStyleHsp" style=""></span>&#60;<span class="elsevierStyleHsp" style=""></span>&#46;05&#46; The statistical analysis was performed using SPSS 15&#46;0 &#40;SPSS Inc&#46;&#44; Chicago&#44; IL&#44; USA&#41; and MedCalc for Windows version 9&#46;2&#46;1&#46;0 &#40;MedCalc Software&#44; Mariakerke&#44; Belgium&#41;&#46;</p></span></span><span id="sec0055" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="sect0115">Results</span><p id="par0095" class="elsevierStylePara elsevierViewall">The details of the 232 individuals involved in the present study are listed in <a class="elsevierStyleCrossRef" href="#tbl0005">Table 1</a>&#46;</p><elsevierMultimedia ident="tbl0005"></elsevierMultimedia><span id="sec0060" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="sect0120">Coronary artery calcium score and coronary artery calcium population percentile</span><p id="par0100" class="elsevierStylePara elsevierViewall">The mean CACS was 117&#46;8 &#40;&#177;277&#41;&#44; with scores ranging from 0 to 2137 &#40;144&#46;6 &#91;&#177;312&#93; for men and 44&#46;4 &#91;&#177;117&#93; for women&#59; <span class="elsevierStyleItalic">p</span><span class="elsevierStyleHsp" style=""></span>&#61;<span class="elsevierStyleHsp" style=""></span>&#46;014&#41;&#46; Ninety-three cases &#40;40&#46;1&#37;&#41; had a complete lack of CAC&#44; while 32 individuals &#40;13&#46;8&#37;&#41; had CACS &#62;300&#46;</p><p id="par0105" class="elsevierStylePara elsevierViewall">The participants with hypertension had significantly higher CACS values than the participants with no hypertension &#40;median CACS&#44; 32 &#91;1&#8211;242&#93; vs&#46; 1 &#91;0&#8211;29&#93;&#59; <span class="elsevierStyleItalic">p</span><span class="elsevierStyleHsp" style=""></span>&#61;<span class="elsevierStyleHsp" style=""></span>&#46;0001&#41;&#44; those with diabetes &#40;median 189 &#91;4&#8211;555&#46;2&#93; vs&#46; 3 &#91;0&#8211;54&#46;7&#93;&#59; <span class="elsevierStyleItalic">p</span><span class="elsevierStyleHsp" style=""></span>&#61;<span class="elsevierStyleHsp" style=""></span>&#46;0001&#41; and those who smoked &#40;median 7 &#91;0&#8211;170&#46;2&#93; vs&#46; 3 &#91;0&#8211;53&#46;5&#93;&#59; <span class="elsevierStyleItalic">p</span><span class="elsevierStyleHsp" style=""></span>&#61;<span class="elsevierStyleHsp" style=""></span>&#46;029&#41;&#46; There were no significant differences between the patients with dyslipidemia and those without dyslipidemia&#46; The individuals with &#8805;3 vascular risk factors had higher CACS values &#40;median 45 &#91;1&#46;75&#8211;389&#46;7&#93; vs&#46; 2 &#91;0&#8211;53&#46;5&#93;&#59; <span class="elsevierStyleItalic">p</span><span class="elsevierStyleHsp" style=""></span>&#61;<span class="elsevierStyleHsp" style=""></span>&#46;0001&#41;&#46;</p><p id="par0110" class="elsevierStylePara elsevierViewall">A total of 38 individuals &#40;16&#46;4&#37;&#41; fell above the 75th population percentile for their CACS adjusted for age and gender&#46;</p></span><span id="sec0065" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="sect0125">Multidetector coronary computer tomography</span><p id="par0115" class="elsevierStylePara elsevierViewall">An MDCT coronary angiography was successfully performed and interpreted for all patients in this series&#46; A total of 148 individuals &#40;63&#46;8&#37;&#41; were identified with differing magnitudes of CAD&#44; while 84 &#40;36&#46;2&#37;&#41; had no signs of CAD&#46; Of the individuals with CAD&#44; 116 &#40;50&#37;&#41; had no significant lesions &#40;luminal stenosis &#60;50&#37;&#41;&#44; and 32 &#40;13&#46;8&#37;&#41; had significant lesions &#40;luminal stenosis &#62;50&#37;&#41;&#46; Among the patients with significant CAD&#44; 11 &#40;34&#46;4&#37;&#41; had 1 diseased vessel&#44; 8 &#40;25&#37;&#41; had 2 diseased vessels&#44; and 13 &#40;45&#46;6&#37;&#41; had 3 diseased vessels&#46; We observed no significant coronary trunk disease in any of the patients in this series&#46;</p><p id="par0120" class="elsevierStylePara elsevierViewall">The relationship between the vascular risk factors and the presence of significant coronary stenosis was evaluated using MDCT &#40;<a class="elsevierStyleCrossRef" href="#tbl0010">Table 2</a>&#41;&#46; Diabetes&#44; smoking and having 3 or more vascular risk factors were associated with a higher percentage of CAD cases by MDCT&#46;</p><elsevierMultimedia ident="tbl0010"></elsevierMultimedia></span><span id="sec0070" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="sect0130">Coronary artery calcium score vs&#46; multidetector coronary computer tomography</span><p id="par0125" class="elsevierStylePara elsevierViewall">Individuals with &#62;50&#37; stenosis presented significantly higher CACS values than those with no significant lesions &#40;median 352&#46;5 &#91;220&#46;5&#8211;707&#93; vs&#46; 1 &#91;0&#8211;28&#93;&#59; <span class="elsevierStyleItalic">p</span><span class="elsevierStyleHsp" style=""></span>&#60;<span class="elsevierStyleHsp" style=""></span>&#46;0001&#41;&#46; A significantly increased number of &#62;50&#37; stenoses were found in individuals with CACS &#62;300 compared with the number found in individuals with CACS &#60;300 &#40;65&#46;6&#37; vs&#46; 5&#46;5&#37;&#59; <span class="elsevierStyleItalic">p</span><span class="elsevierStyleHsp" style=""></span>&#60;<span class="elsevierStyleHsp" style=""></span>&#46;0001&#41; &#40;<a class="elsevierStyleCrossRef" href="#tbl0015">Table 3</a>&#41;&#46; Similarly&#44; patients within or above the 75th percentile of CAC had an increased percentage of significant lesions &#40;57&#46;9&#37; vs&#46; 5&#46;2&#37;&#59; <span class="elsevierStyleItalic">p</span><span class="elsevierStyleHsp" style=""></span>&#60;<span class="elsevierStyleHsp" style=""></span>&#46;0001&#41;&#46; However&#44; 2&#46;1&#37; of the patients with CACS &#60;10 &#40;<span class="elsevierStyleItalic">n</span><span class="elsevierStyleHsp" style=""></span>&#61;<span class="elsevierStyleHsp" style=""></span>48&#41; presented significant CAD&#46; None of the individuals lacking coronary calcium &#40;<span class="elsevierStyleItalic">n</span><span class="elsevierStyleHsp" style=""></span>&#61;<span class="elsevierStyleHsp" style=""></span>93&#59; CACS<span class="elsevierStyleHsp" style=""></span>&#61;<span class="elsevierStyleHsp" style=""></span>0&#41; had significant lesions&#46;</p><elsevierMultimedia ident="tbl0015"></elsevierMultimedia><p id="par0130" class="elsevierStylePara elsevierViewall">The overall diagnostic accuracy of CACS for predicting significant CAD had an area under the receiver operating curve of 0&#46;95 &#40;95&#37; CI&#58; 0&#46;92&#8211;0&#46;98&#41; &#40;<a class="elsevierStyleCrossRef" href="#fig0005">Fig&#46; 1</a>&#41;&#46; With a CACS cutoff of 300&#44; the sensitivity&#44; specificity and positive and negative predictive values for predicting significant CAD were 65&#46;6&#37; &#40;95&#37; CI&#58; 46&#46;8&#8211;81&#46;4&#41;&#44; 94&#46;5&#37; &#40;95&#37; CI&#58; 90&#46;4&#8211;97&#46;2&#41;&#44; 65&#46;5&#37; &#40;95&#37; CI&#58; 50&#46;5&#8211;78&#46;1&#41; and 94&#46;5&#37; &#40;95&#37; CI&#58; 91&#46;4&#8211;96&#46;5&#41;&#44; respectively&#46;</p><elsevierMultimedia ident="fig0005"></elsevierMultimedia></span><span id="sec0075" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="sect0135">Predictors of significant CAD</span><p id="par0135" class="elsevierStylePara elsevierViewall">In the multivariate analysis&#44; the presence of a CACS &#62;300&#44; a value in the &#8805;75th CACS percentile and the coexistence of &#8805;3 vascular risk factors were all shown to be independent predictors for the presence of significant CAD &#40;<a class="elsevierStyleCrossRef" href="#tbl0020">Table 4</a>&#41;&#46;</p><elsevierMultimedia ident="tbl0020"></elsevierMultimedia></span></span><span id="sec0080" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="sect0140">Discussion</span><p id="par0140" class="elsevierStylePara elsevierViewall">This study revealed a high prevalence of asymptomatic CAD &#40;63&#37;&#41;&#44; detected by MDCT&#44; and symptomatic CAD &#40;13&#46;8&#37;&#41;&#46; These results agree with those reported by our group in a separate study conducted using a different patient set&#46;<a class="elsevierStyleCrossRef" href="#bib0080"><span class="elsevierStyleSup">16</span></a> We observed varying levels of CAC in 60&#37; of the individuals&#59; 13&#46;8&#37; of our study population had CACS &#62;300&#46; The presence of 3 or more vascular risk factors and a high CACS were independent markers of significant CAD &#40;<a class="elsevierStyleCrossRef" href="#tbl0020">Table 4</a>&#41;&#44; although the predictive ability of the latter was clearly superior&#46; High CACS can&#44; therefore&#44; be an attractive tool for adding value to traditional risk scales&#46;</p><p id="par0145" class="elsevierStylePara elsevierViewall">The relevance of these findings emphasizes the aforementioned need to refine the traditional cardiovascular risk stratification scales&#46; Moreover&#44; there have been no other studies with Spanish populations that have recorded CAD prevalence data and CAC risk stratification strategies for asymptomatic individuals&#46;</p><p id="par0150" class="elsevierStylePara elsevierViewall">The mean CAC values of our sample were similar to those published by Becker et al&#46;<a class="elsevierStyleCrossRef" href="#bib0085"><span class="elsevierStyleSup">17</span></a> &#40;who studied a population at intermediate to high risk&#41; and higher than those reported by other authors&#46;<a class="elsevierStyleCrossRefs" href="#bib0090"><span class="elsevierStyleSup">18&#44;19</span></a> This discrepancy could be explained by the presence of a certain selection bias in our population compared with other studies that focused on the general population&#46;</p><p id="par0155" class="elsevierStylePara elsevierViewall">The presence of asymptomatic individuals with significant CAD was 13&#46;8&#37; for our study&#46; A study by Romeo et al&#46; conducted in an asymptomatic population showed a higher rate &#40;27&#37;&#41; of significant CAD than our study&#59; however&#44; their study was restricted to a group of high-risk asymptomatic subjects&#46;<a class="elsevierStyleCrossRef" href="#bib0100"><span class="elsevierStyleSup">20</span></a> Moreover&#44; Choi et al&#46;<a class="elsevierStyleCrossRef" href="#bib0090"><span class="elsevierStyleSup">18</span></a> found a 5&#37; prevalence of significant CAD for a group of 1000 individuals from South Korea&#44; highlighting the variability associated with the different characteristics of the study population&#46;</p><p id="par0160" class="elsevierStylePara elsevierViewall">The multivariate analysis showed that the independent predictors for the detection of significant CAD by MDCT were a CACS &#62;300&#44; a CACS in the 75th percentile &#40;or higher&#41; and the presence of 3 or more risk factors&#46; Within the parameters obtained by MDCT&#44; the one with the greatest potential for predicting a stenosis &#62;50&#37; was a CACS &#62;300&#46;</p><p id="par0165" class="elsevierStylePara elsevierViewall">There are numerous studies that directly relate the presence&#44; magnitude and extent of coronary calcifications with coronary atherosclerosis&#46;<a class="elsevierStyleCrossRef" href="#bib0105"><span class="elsevierStyleSup">21</span></a> When present in large amounts&#44; coronary calcifications have been associated with a high probability of significant stenotic lesions and increased mortality&#46;<a class="elsevierStyleCrossRefs" href="#bib0075"><span class="elsevierStyleSup">15&#44;22&#44;23</span></a> These findings have favored the inclusion of CACS in American and European guidelines<a class="elsevierStyleCrossRefs" href="#bib0120"><span class="elsevierStyleSup">24&#44;25</span></a> as a screening method for the asymptomatic population at low-intermediate to intermediate risk&#46;</p><p id="par0170" class="elsevierStylePara elsevierViewall">Some authors&#44; however&#44; question this strategy based upon the observation that the majority of individuals presenting with acute coronary syndromes or unstable angina show noncalcified or minimally calcified lesions&#46;<a class="elsevierStyleCrossRef" href="#bib0130"><span class="elsevierStyleSup">26</span></a> These authors also argue that most of the vulnerable lesions are small&#44; not significant and not visible with angiography&#46;<a class="elsevierStyleCrossRefs" href="#bib0135"><span class="elsevierStyleSup">27&#44;28</span></a> It is notable that in our series&#44; 2&#46;12&#37; of the patients with CACS &#60;10 had a stenosis &#62;50&#37;&#46; A number of studies have shown that despite the high negative predictive value of CACS for coronary events&#44; low CACS &#40;including 0 for individual cases&#41; does not exclude the existence of obstructive CAD&#46;<a class="elsevierStyleCrossRefs" href="#bib0145"><span class="elsevierStyleSup">29&#44;30</span></a> This fact&#44; along with the introduction of the latest generation of MDCT equipment that can use radiation doses below 1<span class="elsevierStyleHsp" style=""></span>mSv&#44;<a class="elsevierStyleCrossRef" href="#bib0155"><span class="elsevierStyleSup">31</span></a> opens the debate on whether to replace the quantification of coronary calcium &#40;as a surrogate marker for CAD&#41; with the direct visualization of coronary lesions using the latest-generation noninvasive MDCT angiography&#46;</p><p id="par0175" class="elsevierStylePara elsevierViewall">A recent subanalysis of asymptomatic individuals in the CONFIRM study<a class="elsevierStyleCrossRef" href="#bib0145"><span class="elsevierStyleSup">29</span></a> revealed that both CACS and MDCT significantly improved the prognostic capacity of traditional risk factors for predicting all-cause mortality and combined events&#46; Moreover&#44; CACS had a greater incremental prognostic value in the predictive model&#44; with little additional contribution from MDCT&#46; It should be noted that this study&#44; although large in scale&#44; is an open registry and that the actions of the clinicians when presented with the results of the MDCT were not reported&#46; It has been suggested that changes in the therapeutic conduct resulting from the anatomical information provided by the MDCT might influence the prognostic impact&#46;<a class="elsevierStyleCrossRef" href="#bib0150"><span class="elsevierStyleSup">30</span></a></p><p id="par0180" class="elsevierStylePara elsevierViewall">Incorporating the measurement of CAC into algorithms of cardiovascular risk prediction for low-intermediate to intermediate risk populations might represent a suitable future strategy&#46; There is a need&#44; however&#44; for more large-scale randomized studies with long-term follow-up to evaluate the role of noninvasive coronary angiography by MDCT for the identification of vulnerable patients and unstable plaques as well as its prognostic impact&#46;<a class="elsevierStyleCrossRefs" href="#bib0155"><span class="elsevierStyleSup">31&#44;32</span></a> Moreover&#44; a low CAC score means that the presence of significant coronary stenosis is unlikely&#44; while a CAC score &#62;300 can be used as a screening strategy for selecting patients for noninvasive coronary angiography&#46;</p><p id="par0185" class="elsevierStylePara elsevierViewall">The limitations of this study should be mentioned&#46; It is retrospective in nature and has a certain patient selection bias&#46; This bias is most likely caused by the probability that a high percentage of individuals who request a checkup are not at very low risk for coronary heart disease&#44; a situation that is repeated systematically in most published studies with these characteristics&#46;</p></span><span id="sec0085" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="sect0145">Conclusions</span><p id="par0190" class="elsevierStylePara elsevierViewall">The quantification of CAC by MDCT is an effective method for determining the extent and magnitude of CAD as well as for defining the predictive capacity of traditional risk factors&#46; A CAC score &#62;300 or occupying the &#8805;75th population percentile is associated with a high prevalence of significant CAD&#46;</p></span><span id="sec0090" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="sect0150">Conflicts of interest</span><p id="par0195" class="elsevierStylePara elsevierViewall">The authors declare that they have no conflicts of interest&#46;</p></span></span>"
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        "titulo" => "Abstract"
        "resumen" => "<span class="elsevierStyleSectionTitle" id="sect0010">Objectives</span><p id="spar0005" class="elsevierStyleSimplePara elsevierViewall">To confirm the value of the coronary artery calcium &#40;CAC&#41; score as an indicator of significant coronary artery disease &#40;CAD&#41; in the asymptomatic Spanish population&#44; using noninvasive coronary angiography by multidetector computed tomography &#40;MDCT&#41;&#46;</p> <span class="elsevierStyleSectionTitle" id="sect0015">Methods</span><p id="spar0010" class="elsevierStyleSimplePara elsevierViewall">This was a retrospective study of 232 asymptomatic individuals&#44; referred for a cardiovascular health checkup that included CAC and MDCT&#46;</p> <span class="elsevierStyleSectionTitle" id="sect0020">Results</span><p id="spar0015" class="elsevierStyleSimplePara elsevierViewall">Participants&#8217; mean age was 54&#46;6 years &#40;SD<span class="elsevierStyleHsp" style=""></span>&#177;<span class="elsevierStyleHsp" style=""></span>12&#46;8&#41;&#59; 73&#46;3&#37; of them were men&#46; The mean CAC value was 117&#46;8 &#40;SD<span class="elsevierStyleHsp" style=""></span>&#177;<span class="elsevierStyleHsp" style=""></span>277&#41;&#46; The individuals with arterial hypertension&#44; diabetes mellitus&#44; smoking and 3 or more risk factors had significantly greater CAC scores&#46; Some 16&#46;4&#37; of the participants were in the &#8805;75th percentile population for CAC&#46; The MDCT identified 148 individuals &#40;63&#46;8&#37;&#41; with CAD&#59; the coronary lesions were not significant in 116 individuals &#40;50&#37;&#41; and were significant &#40;&#62;50&#37; stenosis&#41; in 32 &#40;13&#46;8&#37;&#41;&#46; The participants with diabetes&#44; smoking and &#8805;3 risk vascular factors had a greater prevalence of significant stenosis&#46; The individuals with &#62;50&#37; stenosis had higher CAC values &#40;352&#46;5 vs&#46; 1&#59; <span class="elsevierStyleItalic">p</span><span class="elsevierStyleHsp" style=""></span>&#60;<span class="elsevierStyleHsp" style=""></span>&#46;0001&#41;&#44; and those in the &#8805;75th percentile had a high percentage of significant lesions &#40;57&#46;9&#37; vs&#46; 5&#46;2&#37;&#59; <span class="elsevierStyleItalic">p</span><span class="elsevierStyleHsp" style=""></span>&#60;<span class="elsevierStyleHsp" style=""></span>&#46;0001&#41;&#46; The predictors of significant CAD were a CAC score &#62;300 &#40;OR<span class="elsevierStyleHsp" style=""></span>&#61;<span class="elsevierStyleHsp" style=""></span>10&#46;9&#59; 95&#37; CI 3&#46;35&#8211;35&#46;8&#59; <span class="elsevierStyleItalic">p</span><span class="elsevierStyleHsp" style=""></span>&#61;<span class="elsevierStyleHsp" style=""></span>&#46;0001&#41;&#44; belonging to the &#8805;75th percentile &#40;OR<span class="elsevierStyleHsp" style=""></span>&#61;<span class="elsevierStyleHsp" style=""></span>5&#46;65&#59; 95&#37; CI 1&#46;78&#8211;17&#46;93&#59; <span class="elsevierStyleItalic">p</span><span class="elsevierStyleHsp" style=""></span>&#61;<span class="elsevierStyleHsp" style=""></span>&#46;03&#41; and having 3 or more vascular risk factors &#40;OR<span class="elsevierStyleHsp" style=""></span>&#61;<span class="elsevierStyleHsp" style=""></span>4&#46;19&#59; 95&#37; CI 1&#46;44&#8211;12&#46;14&#59; <span class="elsevierStyleItalic">p</span><span class="elsevierStyleHsp" style=""></span>&#61;<span class="elsevierStyleHsp" style=""></span>&#46;008&#41;&#46;</p> <span class="elsevierStyleSectionTitle" id="sect0025">Conclusion</span><p id="spar0020" class="elsevierStyleSimplePara elsevierViewall">CAC quantification is an effective method for determining the extent and magnitude of CAD and delimiting the predictive capacity of traditional risk factors&#46;</p>"
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      "es" => array:2 [
        "titulo" => "Resumen"
        "resumen" => "<span class="elsevierStyleSectionTitle" id="sect0035">Objetivos</span><p id="spar0025" class="elsevierStyleSimplePara elsevierViewall">Confirmar el valor de la puntuaci&#243;n o score del calcio arterial coronario &#40;CAC&#41; como indicador de enfermedad arterial coronaria &#40;EAC&#41; significativa en poblaci&#243;n espa&#241;ola asintom&#225;tica&#44; mediante coronariograf&#237;a no invasiva por tomograf&#237;a computarizada multidetector &#40;TCMD&#41;&#46;</p> <span class="elsevierStyleSectionTitle" id="sect0040">M&#233;todos</span><p id="spar0030" class="elsevierStyleSimplePara elsevierViewall">Estudio retrospectivo de 232 individuos asintom&#225;ticos&#44; remitidos para un chequeo de salud cardiovascular que incluy&#243; CAC y TCMD&#46;</p> <span class="elsevierStyleSectionTitle" id="sect0045">Resultados</span><p id="spar0035" class="elsevierStyleSimplePara elsevierViewall">La edad media de los sujetos estudiados fue de 54&#44;6 a&#241;os &#40;DE&#58; 12&#44;8&#59; 73&#44;3&#37; varones&#41;&#46; El valor medio del CAC fue de 117&#44;8 &#40;DE&#58; 277&#41;&#46; Los individuos con hipertensi&#243;n arterial&#44; diabetes mellitus&#44; tabaquismo y con &#8805;3 factores de riesgo mostraron un CAC significativamente mayor&#46; Un 16&#44;4&#37; de los sujetos se encontraban en el percentil poblacional &#8805;75 de CAC&#46; La TCMD identific&#243; a 148 individuos &#40;63&#44;8&#37;&#41; con EAC&#44; siendo las lesiones coronarias no significativas en 116 individuos &#40;50&#37;&#41; y significativas &#40;estenosis<span class="elsevierStyleHsp" style=""></span>&#62;<span class="elsevierStyleHsp" style=""></span>50&#37;&#41; en 32 &#40;13&#44;8&#37;&#41;&#46; Los sujetos con diabetes&#44; tabaquismo y &#8805;3 factores de riesgo vascular mostraron una mayor prevalencia de estenosis significativa&#46; Los individuos con estenosis<span class="elsevierStyleHsp" style=""></span>&#62;<span class="elsevierStyleHsp" style=""></span>50&#37; presentaron valores de CAC superiores &#40;352&#44;5 vs&#46; 1&#59; p<span class="elsevierStyleHsp" style=""></span>&#60;<span class="elsevierStyleHsp" style=""></span>0&#44;0001&#41; y los de percentil &#8805;75 presentaron un alto porcentaje de lesiones &#40;57&#44;9 vs&#46; 5&#44;2&#37;&#59; p<span class="elsevierStyleHsp" style=""></span>&#60;<span class="elsevierStyleHsp" style=""></span>0&#44;0001&#41;&#46; Como variables predictoras de EAC significativa destacaron el CAC &#62;<span class="elsevierStyleHsp" style=""></span>300 &#40;OR<span class="elsevierStyleHsp" style=""></span>&#61;<span class="elsevierStyleHsp" style=""></span>10&#44;9&#59; IC95&#37;&#58; 3&#44;35-35&#44;8&#59; p<span class="elsevierStyleHsp" style=""></span>&#61;<span class="elsevierStyleHsp" style=""></span>0&#44;0001&#41;&#44; ocupar un percentil &#8805;75 &#40;OR<span class="elsevierStyleHsp" style=""></span>&#61;<span class="elsevierStyleHsp" style=""></span>5&#44;65&#59; IC95&#37;&#58; 1&#44;78-17&#44;93&#59; p<span class="elsevierStyleHsp" style=""></span>&#61;<span class="elsevierStyleHsp" style=""></span>0&#44;03&#41; y la agrupaci&#243;n de &#8805;3 factores de riesgo vascular &#40;OR<span class="elsevierStyleHsp" style=""></span>&#61;<span class="elsevierStyleHsp" style=""></span>4&#44;19&#59; IC95&#37;&#58; 1&#44;44-12&#44;14&#59; p<span class="elsevierStyleHsp" style=""></span>&#61;<span class="elsevierStyleHsp" style=""></span>0&#44;008&#41;&#46;</p> <span class="elsevierStyleSectionTitle" id="sect0050">Conclusi&#243;n</span><p id="spar0040" class="elsevierStyleSimplePara elsevierViewall">La cuantificaci&#243;n del CAC es un m&#233;todo eficaz para determinar la extensi&#243;n y magnitud de la EAC y delimitar la capacidad predictiva de los factores de riesgo tradicionales&#46;</p>"
      ]
    ]
    "NotaPie" => array:1 [
      0 => array:2 [
        "etiqueta" => "&#9734;"
        "nota" => "<p class="elsevierStyleNotepara" id="npar0010">Please cite this article as&#58; Descalzo M&#44; Vidal-P&#233;rez R&#44; Leta R&#44; Alomar X&#44; Pons-Llad&#243; G&#44; Carreras F&#46; Utilidad del calcio arterial coronario para detectar enfermedad arterial coronaria significativa en sujetos asintom&#225;ticos&#46; Rev Clin Esp&#46; 2014&#59;214&#58;235&#8211;241&#46;</p>"
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          "leyenda" => "<p id="spar0055" class="elsevierStyleSimplePara elsevierViewall"><span class="elsevierStyleItalic">Abbreviations</span>&#58; CAD&#44; premature coronary artery disease&#59; SD&#44; standard deviation&#46;</p>"
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                  <table border="0" frame="\n
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                  \t\t\t\t\ttable-head\n
                  \t\t\t\t  " align="left" valign="\n
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                  \t\t\t\t" style="border-bottom: 2px solid black">Risk factors&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
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                  \t\t\t\t  " align="left" valign="\n
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                  \t\t\t\t" style="border-bottom: 2px solid black"><span class="elsevierStyleItalic">n</span><span class="elsevierStyleHsp" style=""></span>&#61;<span class="elsevierStyleHsp" style=""></span>232&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td></tr></thead><tbody title="tbody"><tr title="table-row"><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="left" valign="\n
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                  \t\t\t\t">Age&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="char" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">54&#46;6 &#40;DE&#58; 12&#46;8&#41;&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td></tr><tr title="table-row"><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">Gender distribution&#44; men &#40;&#37;&#41;&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="char" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">170 &#40;73&#46;3&#37;&#41;&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td></tr><tr title="table-row"><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">Hypertension &#40;&#37;&#41;&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="char" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">78 &#40;36&#46;6&#37;&#41;&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td></tr><tr title="table-row"><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">Dyslipidemia &#40;&#37;&#41;&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="char" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">107 &#40;46&#46;1&#37;&#41;&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td></tr><tr title="table-row"><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">Smoking &#40;&#37;&#41;&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="char" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">89 &#40;38&#46;4&#37;&#41;&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td></tr><tr title="table-row"><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">Diabetes &#40;&#37;&#41;&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="char" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">23 &#40;9&#46;9&#37;&#41;&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td></tr><tr title="table-row"><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">Family history of CAD &#40;&#37;&#41;&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="char" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">26 &#40;11&#46;2&#37;&#41;&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td></tr><tr title="table-row"><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">&#8805;3 vascular risk factors &#40;&#37;&#41;&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="char" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">45 &#40;19&#46;4&#37;&#41;&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td></tr></tbody></table>
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        "tabla" => array:2 [
          "leyenda" => "<p id="spar0065" class="elsevierStyleSimplePara elsevierViewall"><span class="elsevierStyleItalic">Abbreviation</span>&#58; CAD&#44; premature coronary artery disease&#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"><td class="td" title="\n
                  \t\t\t\t\ttable-head\n
                  \t\t\t\t  " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t" style="border-bottom: 2px solid black">Risk factors&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-head\n
                  \t\t\t\t  " align="left" valign="\n
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                  \t\t\t\t" style="border-bottom: 2px solid black">&#62;50&#37; stenosis&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-head\n
                  \t\t\t\t  " align="left" valign="\n
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                  \t\t\t\t" style="border-bottom: 2px solid black">&#60;50&#37; stenosis&nbsp;\t\t\t\t\t\t\n
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                  \t\t\t\t\ttable-head\n
                  \t\t\t\t  " align="left" valign="\n
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                  \t\t\t\t" style="border-bottom: 2px solid black"><span class="elsevierStyleItalic">p</span>-Value&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td></tr></thead><tbody title="tbody"><tr title="table-row"><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="left" valign="\n
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                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="char" valign="\n
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                  \t\t\t\t">20&#46;5&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="char" valign="\n
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                  \t\t\t\t">10&#46;4&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="char" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">&#46;056&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td></tr><tr title="table-row"><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">Dyslipidemia &#40;&#37;&#41;&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="char" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">17&#46;8&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="char" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">10&#46;4&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="char" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">&#46;15&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td></tr><tr title="table-row"><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">Smoking &#40;&#37;&#41;&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="char" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">21&#46;3&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="char" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">9&#46;1&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="char" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">&#46;015&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td></tr><tr title="table-row"><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">Diabetes &#40;&#37;&#41;&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="char" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">43&#46;5&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="char" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">10&#46;5&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="char" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">&#46;0001&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td></tr><tr title="table-row"><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">Family history of CAD &#40;&#37;&#41;&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="char" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">11&#46;5&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="char" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">14&#46;1&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="char" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">&#46;95&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td></tr><tr title="table-row"><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">&#8805;3 vascular risk factors &#40;&#37;&#41;&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="char" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">37&#46;8&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="char" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">8&#46;0&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="char" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">&#46;0001&nbsp;\t\t\t\t\t\t\n
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                  """
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                  \t\t\t\t  " align="left" valign="\n
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                  \t\t\t\t" style="border-bottom: 2px solid black">Coronary arterial calcium&nbsp;\t\t\t\t\t\t\n
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                  \t\t\t\t\ttable-head\n
                  \t\t\t\t  " align="left" valign="\n
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                  \t\t\t\t" style="border-bottom: 2px solid black">&#60;50&#37; coronary stenosis<span class="elsevierStyleItalic">n</span><span class="elsevierStyleHsp" style=""></span>&#61;<span class="elsevierStyleHsp" style=""></span>200 &#40;&#37;&#41;&nbsp;\t\t\t\t\t\t\n
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                  \t\t\t\t" style="border-bottom: 2px solid black">&#62;50&#37; coronary stenosis<span class="elsevierStyleItalic">n</span><span class="elsevierStyleHsp" style=""></span>&#61;<span class="elsevierStyleHsp" style=""></span>32 &#40;&#37;&#41;&nbsp;\t\t\t\t\t\t\n
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                  \t\t\t\t">0&nbsp;\t\t\t\t\t\t\n
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                  \t\t\t\t">93 &#40;100&#41;&nbsp;\t\t\t\t\t\t\n
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                  \t\t\t\t">0 &#40;0&#41;&nbsp;\t\t\t\t\t\t\n
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                  \t\t\t\t">1&#8211;10&nbsp;\t\t\t\t\t\t\n
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                  \t\t\t\t">47 &#40;97&#46;9&#41;<a class="elsevierStyleCrossRef" href="#tblfn0005"><span class="elsevierStyleSup">a</span></a>&nbsp;\t\t\t\t\t\t\n
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          "en" => "<p id="spar0070" class="elsevierStyleSimplePara elsevierViewall">Relationship between the coronary calcium score determined with multidetector computed tomography and the presence of significant coronary stenosis&#46;</p>"
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          "leyenda" => "<p id="spar0080" class="elsevierStyleSimplePara elsevierViewall"><span class="elsevierStyleItalic">Abbreviation</span>&#58; CACS&#44; coronary artery calcium score&#46;</p>"
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                  \t\t\t\t" style="border-bottom: 2px solid black">Odds ratio&nbsp;\t\t\t\t\t\t\n
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                  \t\t\t\t">&#8805;3 vascular risk factors&nbsp;\t\t\t\t\t\t\n
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                  \t\t\t\t">75th percentile of CACS&nbsp;\t\t\t\t\t\t\n
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                  \t\t\t\t">5&#46;657&nbsp;\t\t\t\t\t\t\n
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          "en" => "<p id="spar0075" class="elsevierStyleSimplePara elsevierViewall">Predictors of significant coronary arterial disease&#46;</p>"
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          "textoCompleto" => "<span class="elsevierStyleSections"><span id="sec0005" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="sect0065">What we know&#63;</span><p id="par0010" class="elsevierStylePara elsevierViewall">Determining coronary calcium levels through noninvasive techniques such as multidetector computed tomography is a useful procedure for establishing the diagnosis of coronary artery disease&#46; However&#44; we do not know its sensitivity and specificity for a Spanish population of asymptomatic patients&#46;</p></span><span id="sec0010" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="sect0070">What this article provides&#63;</span><p id="par0015" class="elsevierStylePara elsevierViewall">In a university hospital in Barcelona and with a sample of 232 asymptomatic patients &#40;73&#37; men&#41; who visited for a health checkup&#44; 64&#37; had coronary atherosclerotic disease &#40;14&#37; with significant coronary lesions &#91;stenosis in an arterial lumen&#44; &#62;50&#37;&#93;&#41;&#46; The predictors of coronary artery disease were &#40;a&#41; a coronary calcium score &#62;300&#59; &#40;b&#41; being above the 75th percentile for coronary calcium content and &#40;c&#41; having 3 or more vascular risk factors&#46; Multidetector computed tomography was useful for detecting coronary artery disease in patients with high vascular risk&#46;</p><p id="par0020" class="elsevierStylePara elsevierViewall">The Editors</p></span></span>"
        ]
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        0 => array:2 [
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                  "contribucion" => array:1 [
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                      "autores" => array:1 [
                        0 => array:2 [
                          "etal" => false
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                    ]
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                    0 => array:2 [
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                      "Revista" => array:6 [
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              "identificador" => "bib0015"
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              "referencia" => array:1 [
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                            0 => "R&#46;M&#46; Conray"
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                0 => array:2 [
                  "contribucion" => array:1 [
                    0 => array:2 [
                      "titulo" => "Preventing myocardial infarction in the young adult in the first place&#58; how do the National Cholesterol Education Panel III guidelines perform&#63;"
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                        0 => array:2 [
                          "etal" => false
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                            0 => "K&#46;O&#46; Akosah"
                            1 => "A&#46; Schaper"
                            2 => "C&#46; Cogbill"
                            3 => "P&#46; Schoenfeld"
                          ]
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                  ]
                  "host" => array:1 [
                    0 => array:1 [
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                          "etal" => true
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                            0 => "U&#46;N&#46; Khot"
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                            2 => "C&#46;T&#46; Bajzer"
                            3 => "S&#46;K&#46; Sapp"
                            4 => "E&#46;M&#46; Ohman"
                            5 => "S&#46;J&#46; Brener"
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                        0 => array:2 [
                          "etal" => false
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                            0 => "J&#46;D&#46; Neaton"
                            1 => "D&#46; Wentworth"
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                      ]
                    ]
                  ]
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              "etiqueta" => "7"
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                0 => array:2 [
                  "contribucion" => array:1 [
                    0 => array:2 [
                      "titulo" => "Coronary artery calcium area by electron beam computed tomography and coronary atherosclerotic plaque area&#58; a histopathologic correlative study"
                      "autores" => array:1 [
                        0 => array:2 [
                          "etal" => false
                          "autores" => array:5 [
                            0 => "J&#46;A&#46; Rumberger"
                            1 => "D&#46;B&#46; Simons"
                            2 => "L&#46;A&#46; Fitzpatrick"
                            3 => "P&#46;F&#46; Sheedy"
                            4 => "R&#46;S&#46; Schwartz"
                          ]
                        ]
                      ]
                    ]
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Original article
Usefulness of coronary artery calcium for detecting significant coronary artery disease in asymptomatic individuals
Utilidad del calcio arterial coronario para detectar enfermedad arterial coronaria significativa en sujetos asintomáticos
M. Descalzob,c,
Corresponding author
mdescalzo@gmail.com

Corresponding author.
, R. Vidal-Péreza, R. Letab,c, X. Alomarb, G. Pons-Lladób,c, F. Carrerasb,c
a Servicio de Cardiología, Hospital Clínico Universitario de Santiago de Compostela, Santiago de Compostela, Spain
b Unidad de Imagen, Clínica Creu Blanca, Barcelona, Spain
c Unidad de Imagen Cardiaca, Servicio de Cardiología, Hospital de la Santa Creu i Sant Pau, Barcelona, Spain
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        "titulo" => "Utilidad del calcio arterial coronario para detectar enfermedad arterial coronaria significativa en sujetos asintom&#225;ticos"
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          "en" => "<p id="spar0045" class="elsevierStyleSimplePara elsevierViewall">Sensitivity and specificity of coronary calcium determination for the diagnosis of coronary artery disease by multidetector computed tomography&#46;</p>"
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    "textoCompleto" => "<span class="elsevierStyleSections"><p id="par0005" class="elsevierStylePara elsevierViewall"><elsevierMultimedia ident="tb0005"></elsevierMultimedia></p><span id="sec0015" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="sect0075">Background</span><p id="par0025" class="elsevierStylePara elsevierViewall">Coronary artery disease &#40;CAD&#41; remains the leading cause of death in Western industrialized countries despite the results of prevention strategies&#46;<a class="elsevierStyleCrossRef" href="#bib0005"><span class="elsevierStyleSup">1</span></a> Given that approximately 50&#37; of deaths from a coronary origin occur in asymptomatic patients&#44; the early detection of individuals at risk of cardiovascular events is crucial for establishing an adequate prevention of CAD&#46;<a class="elsevierStyleCrossRef" href="#bib0010"><span class="elsevierStyleSup">2</span></a> The most frequently used stratification tools are cardiovascular risk scales such as the Framingham Risk Score and the European Systematic Coronary Risk Evaluation &#40;SCORE&#41;&#46;<a class="elsevierStyleCrossRefs" href="#bib0015"><span class="elsevierStyleSup">3&#44;4</span></a> These risk scales have proven useful when applied to population groups but result in a limited estimation of individual risk&#46;<a class="elsevierStyleCrossRef" href="#bib0025"><span class="elsevierStyleSup">5</span></a> It is known that the conventional risk stratification models would not have identified up to 40&#37; of patients with a myocardial infarction&#46;<a class="elsevierStyleCrossRef" href="#bib0030"><span class="elsevierStyleSup">6</span></a> Therefore&#44; there is increasing interest in identifying more precise risk prediction strategies&#44; apart from the traditional risk factors&#46;</p><p id="par0030" class="elsevierStylePara elsevierViewall">The presence of coronary artery calcium &#40;CAC&#41; was demonstrated more than 15 years ago to be a sensitive marker for atherosclerosis&#44; even in subclinical stages&#46;<a class="elsevierStyleCrossRef" href="#bib0035"><span class="elsevierStyleSup">7</span></a> Subsequent meta-analyses confirmed the clear association of CAC&#44; its magnitude and progression with the clinical prognosis of CAD&#46;<a class="elsevierStyleCrossRefs" href="#bib0040"><span class="elsevierStyleSup">8&#8211;10</span></a> This analysis further showed the added predictive value of incorporating CAC into traditional stratification scales&#46;<a class="elsevierStyleCrossRef" href="#bib0055"><span class="elsevierStyleSup">11</span></a> These findings make the CAC score &#40;CACS&#41; a potential tool for improving vascular risk stratification and are particularly useful for the intermediate-risk population&#46;<a class="elsevierStyleCrossRef" href="#bib0060"><span class="elsevierStyleSup">12</span></a></p><p id="par0035" class="elsevierStylePara elsevierViewall">The objective of the current study was to analyze the CACS as an indicator of significant CAD in an asymptomatic Spanish population&#44; using noninvasive coronarography with multidetector computed tomography &#40;MDCT&#41; as a reference technique&#46;</p></span><span id="sec0020" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="sect0080">Methods</span><span id="sec0025" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="sect0085">Population selection</span><p id="par0040" class="elsevierStylePara elsevierViewall">The study comprised a retrospective series of 232 consecutive&#44; asymptomatic individuals&#44; without evidence of CAD&#44; referred for a MDCT in the context of a health checkup&#46; The patients were studied between the years 2004 and 2008&#46; Majority of the studies were conducted in the context of a company health checkup or comprised people who wanted an assessment of their own cardiovascular situation&#46; The following were considered inclusion criteria&#58; absence of heart disease&#44; absence of angina and symptoms that might correspond to an anginal equivalent&#46; The following were considered exclusion criteria&#58; allergy to iodinated contrast media&#44; nondialyzed renal insufficiency with a glomerular filtration rate &#60;30<span class="elsevierStyleHsp" style=""></span>mL&#47;min and a body mass index &#62;40<span class="elsevierStyleHsp" style=""></span>kg&#47;m<span class="elsevierStyleSup">2</span>&#46; All participants consented to the MDCT procedure after reading and signing the informed consent&#46; The cardiovascular risk factors considered for this study were gathered from the participants&#8217; previous clinical history&#46;</p></span><span id="sec0030" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="sect0090">Coronary multidetector computed tomography</span><p id="par0045" class="elsevierStylePara elsevierViewall">The CAC and MDCT protocols used for this study have been described in previous publications&#46;<a class="elsevierStyleCrossRef" href="#bib0055"><span class="elsevierStyleSup">11</span></a> The protocols also included the acquisition of noncontrast images &#40;coronary calcium study&#41; and a second acquisition with the concomitant administration of iodinated contrast media &#40;noninvasive coronarography&#41;&#46;</p></span><span id="sec0035" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="sect0095">Coronary calcium study</span><p id="par0050" class="elsevierStylePara elsevierViewall">The imaging study was conducted on a first-generation Toshiba<span class="elsevierStyleSup">&#174;</span> Aquilion 64 CT scanner &#40;Toshiba Corporation&#44; Medical Systems&#44; Otawara&#44; Japan&#41; with 64 detectors&#46; The study protocol started with performing a topogram to determine the limits of acquisition of cardiac volume&#44; which are generally delimited by the carina&#44; trachea and diaphragm&#46; The parameters of the administered radiation were adjusted in a conventional manner with respect to the morphological characteristics of each patient&#58; X-rays of 120<span class="elsevierStyleHsp" style=""></span>kV&#44; with a tube current between 250 and 400<span class="elsevierStyleHsp" style=""></span>mA&#46;</p><p id="par0055" class="elsevierStylePara elsevierViewall">The CAC study was performed according to the modified Agatston protocol&#46;<a class="elsevierStyleCrossRef" href="#bib0060"><span class="elsevierStyleSup">12</span></a></p></span><span id="sec0040" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="sect0100">Noninvasive coronarography</span><p id="par0060" class="elsevierStylePara elsevierViewall">The acquisition of cardiac volume images was performed using a continuous helical technique&#44; throughout the entire cardiac cycle&#44; with a slice thickness of 0&#46;5<span class="elsevierStyleHsp" style=""></span>mm&#59; an electrocardiogram was simultaneously recorded&#46; Nitroglycerine was administered sublingually to all participants&#46; Patients with a heart rate &#62;70 beats per minute were treated intravenously with a beta-blocker &#40;5&#8211;15<span class="elsevierStyleHsp" style=""></span>mg metoprolol&#41;&#44; when not contraindicated&#46;</p><p id="par0065" class="elsevierStylePara elsevierViewall">An infusion pump in the cephalic vein was used to deliver iodinated contrast media in order to enhance the coronary arterial tree&#46; A total of 80&#8211;100<span class="elsevierStyleHsp" style=""></span>mL of Iobitridol &#40;Xenetix<span class="elsevierStyleSup">&#174;</span>&#41; was administered at a concentration of 350<span class="elsevierStyleHsp" style=""></span>mg&#47;mL at an infusion rate of 5&#8211;6<span class="elsevierStyleHsp" style=""></span>mL&#47;s&#46; The adjustment between contrast media administration and image acquisition was performed automatically using a bolus-tracking system&#44; which detected the arrival of the contrast media in the region of interest situated within the ascending aorta&#46;</p><p id="par0070" class="elsevierStylePara elsevierViewall">After the acquisition&#44; the images were reconstructed with an interval of 0&#46;3<span class="elsevierStyleHsp" style=""></span>mm and with a temporal resolution of approximately 80<span class="elsevierStyleHsp" style=""></span>ms&#44; resulting in a cardiac volume comprising 350&#8211;400 anatomical sections&#46;</p></span><span id="sec0045" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="sect0105">Analysis of coronary multidetector tomography data</span><p id="par0075" class="elsevierStylePara elsevierViewall"><ul class="elsevierStyleList" id="lis0005"><li class="elsevierStyleListItem" id="lsti0005"><span class="elsevierStyleLabel">-</span><p id="par0080" class="elsevierStylePara elsevierViewall"><span class="elsevierStyleItalic">Coronary artery calcium score &#40;CACS&#41;</span>&#58; Coronary calcium was quantified on a workstation with specialized software &#40;Vitrea2<span class="elsevierStyleSup">&#174;</span>&#44; Vital images&#44; Plymouth&#44; MN&#44; USA&#41;&#46; CAC areas were identified as dense regions in the coronary artery that exceeded a threshold of 130<span class="elsevierStyleHsp" style=""></span>Hounsfield units &#40;HU&#41;&#46; The Agatston CACS was also quantified<a class="elsevierStyleCrossRef" href="#bib0065"><span class="elsevierStyleSup">13</span></a> for each patient as well as the population percentile for age and gender corresponding to this CACS&#46;<a class="elsevierStyleCrossRef" href="#bib0070"><span class="elsevierStyleSup">14</span></a></p></li><li class="elsevierStyleListItem" id="lsti0010"><span class="elsevierStyleLabel">-</span><p id="par0085" class="elsevierStylePara elsevierViewall"><span class="elsevierStyleItalic">Coronary multidetector tomography</span>&#58; The coronary anatomical study was conducted using maximum intensity projections&#44; multiplanar &#40;curved plane and transverse axis&#41; reconstruction and 3-D volume rendering&#46; Coronary segmentation followed a 17-segment model in accordance with the modified classification of the American Heart Association&#46;<a class="elsevierStyleCrossRef" href="#bib0075"><span class="elsevierStyleSup">15</span></a> Two expert observers &#40;one with more than 10 years of experience and the other with 4 years of experience&#41; reached a consensus and determined &#40;a&#41; the capacity for image interpretation and &#40;b&#41; the presence and magnitude of coronary stenotic lesions&#46; Lesions were considered significant if they were visually estimated to be larger than 50&#37;&#44; using as reference the contrasted area of the vessel lumen in the segments neighboring the stenosis&#46;</p></li></ul></p></span><span id="sec0050" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="sect0110">Statistical analysis</span><p id="par0090" class="elsevierStylePara elsevierViewall">The quantitative variables with a normal distribution were expressed as mean<span class="elsevierStyleHsp" style=""></span>&#177;<span class="elsevierStyleHsp" style=""></span>standard deviation &#40;SD&#41;&#44; variables with an asymmetric distribution were expressed as median &#40;with interquartile range&#41; and categorical variables were expressed as frequency &#40;percentage&#41;&#46; The differences between quartiles for the various clinical variables were analyzed using an analysis of variance &#40;ANOVA&#41;&#44; the Mann&#8211;Whitney <span class="elsevierStyleItalic">U</span> test &#40;for the continuous variables&#41; and Pearson&#39;s chi-squared test &#40;for the categorical variables&#41;&#46; The multivariate analysis to determine the independent predictors of significant CAC for MDCT was performed using a logistic regression model&#46; Statistical significance was set at <span class="elsevierStyleItalic">p</span><span class="elsevierStyleHsp" style=""></span>&#60;<span class="elsevierStyleHsp" style=""></span>&#46;05&#46; The statistical analysis was performed using SPSS 15&#46;0 &#40;SPSS Inc&#46;&#44; Chicago&#44; IL&#44; USA&#41; and MedCalc for Windows version 9&#46;2&#46;1&#46;0 &#40;MedCalc Software&#44; Mariakerke&#44; Belgium&#41;&#46;</p></span></span><span id="sec0055" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="sect0115">Results</span><p id="par0095" class="elsevierStylePara elsevierViewall">The details of the 232 individuals involved in the present study are listed in <a class="elsevierStyleCrossRef" href="#tbl0005">Table 1</a>&#46;</p><elsevierMultimedia ident="tbl0005"></elsevierMultimedia><span id="sec0060" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="sect0120">Coronary artery calcium score and coronary artery calcium population percentile</span><p id="par0100" class="elsevierStylePara elsevierViewall">The mean CACS was 117&#46;8 &#40;&#177;277&#41;&#44; with scores ranging from 0 to 2137 &#40;144&#46;6 &#91;&#177;312&#93; for men and 44&#46;4 &#91;&#177;117&#93; for women&#59; <span class="elsevierStyleItalic">p</span><span class="elsevierStyleHsp" style=""></span>&#61;<span class="elsevierStyleHsp" style=""></span>&#46;014&#41;&#46; Ninety-three cases &#40;40&#46;1&#37;&#41; had a complete lack of CAC&#44; while 32 individuals &#40;13&#46;8&#37;&#41; had CACS &#62;300&#46;</p><p id="par0105" class="elsevierStylePara elsevierViewall">The participants with hypertension had significantly higher CACS values than the participants with no hypertension &#40;median CACS&#44; 32 &#91;1&#8211;242&#93; vs&#46; 1 &#91;0&#8211;29&#93;&#59; <span class="elsevierStyleItalic">p</span><span class="elsevierStyleHsp" style=""></span>&#61;<span class="elsevierStyleHsp" style=""></span>&#46;0001&#41;&#44; those with diabetes &#40;median 189 &#91;4&#8211;555&#46;2&#93; vs&#46; 3 &#91;0&#8211;54&#46;7&#93;&#59; <span class="elsevierStyleItalic">p</span><span class="elsevierStyleHsp" style=""></span>&#61;<span class="elsevierStyleHsp" style=""></span>&#46;0001&#41; and those who smoked &#40;median 7 &#91;0&#8211;170&#46;2&#93; vs&#46; 3 &#91;0&#8211;53&#46;5&#93;&#59; <span class="elsevierStyleItalic">p</span><span class="elsevierStyleHsp" style=""></span>&#61;<span class="elsevierStyleHsp" style=""></span>&#46;029&#41;&#46; There were no significant differences between the patients with dyslipidemia and those without dyslipidemia&#46; The individuals with &#8805;3 vascular risk factors had higher CACS values &#40;median 45 &#91;1&#46;75&#8211;389&#46;7&#93; vs&#46; 2 &#91;0&#8211;53&#46;5&#93;&#59; <span class="elsevierStyleItalic">p</span><span class="elsevierStyleHsp" style=""></span>&#61;<span class="elsevierStyleHsp" style=""></span>&#46;0001&#41;&#46;</p><p id="par0110" class="elsevierStylePara elsevierViewall">A total of 38 individuals &#40;16&#46;4&#37;&#41; fell above the 75th population percentile for their CACS adjusted for age and gender&#46;</p></span><span id="sec0065" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="sect0125">Multidetector coronary computer tomography</span><p id="par0115" class="elsevierStylePara elsevierViewall">An MDCT coronary angiography was successfully performed and interpreted for all patients in this series&#46; A total of 148 individuals &#40;63&#46;8&#37;&#41; were identified with differing magnitudes of CAD&#44; while 84 &#40;36&#46;2&#37;&#41; had no signs of CAD&#46; Of the individuals with CAD&#44; 116 &#40;50&#37;&#41; had no significant lesions &#40;luminal stenosis &#60;50&#37;&#41;&#44; and 32 &#40;13&#46;8&#37;&#41; had significant lesions &#40;luminal stenosis &#62;50&#37;&#41;&#46; Among the patients with significant CAD&#44; 11 &#40;34&#46;4&#37;&#41; had 1 diseased vessel&#44; 8 &#40;25&#37;&#41; had 2 diseased vessels&#44; and 13 &#40;45&#46;6&#37;&#41; had 3 diseased vessels&#46; We observed no significant coronary trunk disease in any of the patients in this series&#46;</p><p id="par0120" class="elsevierStylePara elsevierViewall">The relationship between the vascular risk factors and the presence of significant coronary stenosis was evaluated using MDCT &#40;<a class="elsevierStyleCrossRef" href="#tbl0010">Table 2</a>&#41;&#46; Diabetes&#44; smoking and having 3 or more vascular risk factors were associated with a higher percentage of CAD cases by MDCT&#46;</p><elsevierMultimedia ident="tbl0010"></elsevierMultimedia></span><span id="sec0070" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="sect0130">Coronary artery calcium score vs&#46; multidetector coronary computer tomography</span><p id="par0125" class="elsevierStylePara elsevierViewall">Individuals with &#62;50&#37; stenosis presented significantly higher CACS values than those with no significant lesions &#40;median 352&#46;5 &#91;220&#46;5&#8211;707&#93; vs&#46; 1 &#91;0&#8211;28&#93;&#59; <span class="elsevierStyleItalic">p</span><span class="elsevierStyleHsp" style=""></span>&#60;<span class="elsevierStyleHsp" style=""></span>&#46;0001&#41;&#46; A significantly increased number of &#62;50&#37; stenoses were found in individuals with CACS &#62;300 compared with the number found in individuals with CACS &#60;300 &#40;65&#46;6&#37; vs&#46; 5&#46;5&#37;&#59; <span class="elsevierStyleItalic">p</span><span class="elsevierStyleHsp" style=""></span>&#60;<span class="elsevierStyleHsp" style=""></span>&#46;0001&#41; &#40;<a class="elsevierStyleCrossRef" href="#tbl0015">Table 3</a>&#41;&#46; Similarly&#44; patients within or above the 75th percentile of CAC had an increased percentage of significant lesions &#40;57&#46;9&#37; vs&#46; 5&#46;2&#37;&#59; <span class="elsevierStyleItalic">p</span><span class="elsevierStyleHsp" style=""></span>&#60;<span class="elsevierStyleHsp" style=""></span>&#46;0001&#41;&#46; However&#44; 2&#46;1&#37; of the patients with CACS &#60;10 &#40;<span class="elsevierStyleItalic">n</span><span class="elsevierStyleHsp" style=""></span>&#61;<span class="elsevierStyleHsp" style=""></span>48&#41; presented significant CAD&#46; None of the individuals lacking coronary calcium &#40;<span class="elsevierStyleItalic">n</span><span class="elsevierStyleHsp" style=""></span>&#61;<span class="elsevierStyleHsp" style=""></span>93&#59; CACS<span class="elsevierStyleHsp" style=""></span>&#61;<span class="elsevierStyleHsp" style=""></span>0&#41; had significant lesions&#46;</p><elsevierMultimedia ident="tbl0015"></elsevierMultimedia><p id="par0130" class="elsevierStylePara elsevierViewall">The overall diagnostic accuracy of CACS for predicting significant CAD had an area under the receiver operating curve of 0&#46;95 &#40;95&#37; CI&#58; 0&#46;92&#8211;0&#46;98&#41; &#40;<a class="elsevierStyleCrossRef" href="#fig0005">Fig&#46; 1</a>&#41;&#46; With a CACS cutoff of 300&#44; the sensitivity&#44; specificity and positive and negative predictive values for predicting significant CAD were 65&#46;6&#37; &#40;95&#37; CI&#58; 46&#46;8&#8211;81&#46;4&#41;&#44; 94&#46;5&#37; &#40;95&#37; CI&#58; 90&#46;4&#8211;97&#46;2&#41;&#44; 65&#46;5&#37; &#40;95&#37; CI&#58; 50&#46;5&#8211;78&#46;1&#41; and 94&#46;5&#37; &#40;95&#37; CI&#58; 91&#46;4&#8211;96&#46;5&#41;&#44; respectively&#46;</p><elsevierMultimedia ident="fig0005"></elsevierMultimedia></span><span id="sec0075" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="sect0135">Predictors of significant CAD</span><p id="par0135" class="elsevierStylePara elsevierViewall">In the multivariate analysis&#44; the presence of a CACS &#62;300&#44; a value in the &#8805;75th CACS percentile and the coexistence of &#8805;3 vascular risk factors were all shown to be independent predictors for the presence of significant CAD &#40;<a class="elsevierStyleCrossRef" href="#tbl0020">Table 4</a>&#41;&#46;</p><elsevierMultimedia ident="tbl0020"></elsevierMultimedia></span></span><span id="sec0080" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="sect0140">Discussion</span><p id="par0140" class="elsevierStylePara elsevierViewall">This study revealed a high prevalence of asymptomatic CAD &#40;63&#37;&#41;&#44; detected by MDCT&#44; and symptomatic CAD &#40;13&#46;8&#37;&#41;&#46; These results agree with those reported by our group in a separate study conducted using a different patient set&#46;<a class="elsevierStyleCrossRef" href="#bib0080"><span class="elsevierStyleSup">16</span></a> We observed varying levels of CAC in 60&#37; of the individuals&#59; 13&#46;8&#37; of our study population had CACS &#62;300&#46; The presence of 3 or more vascular risk factors and a high CACS were independent markers of significant CAD &#40;<a class="elsevierStyleCrossRef" href="#tbl0020">Table 4</a>&#41;&#44; although the predictive ability of the latter was clearly superior&#46; High CACS can&#44; therefore&#44; be an attractive tool for adding value to traditional risk scales&#46;</p><p id="par0145" class="elsevierStylePara elsevierViewall">The relevance of these findings emphasizes the aforementioned need to refine the traditional cardiovascular risk stratification scales&#46; Moreover&#44; there have been no other studies with Spanish populations that have recorded CAD prevalence data and CAC risk stratification strategies for asymptomatic individuals&#46;</p><p id="par0150" class="elsevierStylePara elsevierViewall">The mean CAC values of our sample were similar to those published by Becker et al&#46;<a class="elsevierStyleCrossRef" href="#bib0085"><span class="elsevierStyleSup">17</span></a> &#40;who studied a population at intermediate to high risk&#41; and higher than those reported by other authors&#46;<a class="elsevierStyleCrossRefs" href="#bib0090"><span class="elsevierStyleSup">18&#44;19</span></a> This discrepancy could be explained by the presence of a certain selection bias in our population compared with other studies that focused on the general population&#46;</p><p id="par0155" class="elsevierStylePara elsevierViewall">The presence of asymptomatic individuals with significant CAD was 13&#46;8&#37; for our study&#46; A study by Romeo et al&#46; conducted in an asymptomatic population showed a higher rate &#40;27&#37;&#41; of significant CAD than our study&#59; however&#44; their study was restricted to a group of high-risk asymptomatic subjects&#46;<a class="elsevierStyleCrossRef" href="#bib0100"><span class="elsevierStyleSup">20</span></a> Moreover&#44; Choi et al&#46;<a class="elsevierStyleCrossRef" href="#bib0090"><span class="elsevierStyleSup">18</span></a> found a 5&#37; prevalence of significant CAD for a group of 1000 individuals from South Korea&#44; highlighting the variability associated with the different characteristics of the study population&#46;</p><p id="par0160" class="elsevierStylePara elsevierViewall">The multivariate analysis showed that the independent predictors for the detection of significant CAD by MDCT were a CACS &#62;300&#44; a CACS in the 75th percentile &#40;or higher&#41; and the presence of 3 or more risk factors&#46; Within the parameters obtained by MDCT&#44; the one with the greatest potential for predicting a stenosis &#62;50&#37; was a CACS &#62;300&#46;</p><p id="par0165" class="elsevierStylePara elsevierViewall">There are numerous studies that directly relate the presence&#44; magnitude and extent of coronary calcifications with coronary atherosclerosis&#46;<a class="elsevierStyleCrossRef" href="#bib0105"><span class="elsevierStyleSup">21</span></a> When present in large amounts&#44; coronary calcifications have been associated with a high probability of significant stenotic lesions and increased mortality&#46;<a class="elsevierStyleCrossRefs" href="#bib0075"><span class="elsevierStyleSup">15&#44;22&#44;23</span></a> These findings have favored the inclusion of CACS in American and European guidelines<a class="elsevierStyleCrossRefs" href="#bib0120"><span class="elsevierStyleSup">24&#44;25</span></a> as a screening method for the asymptomatic population at low-intermediate to intermediate risk&#46;</p><p id="par0170" class="elsevierStylePara elsevierViewall">Some authors&#44; however&#44; question this strategy based upon the observation that the majority of individuals presenting with acute coronary syndromes or unstable angina show noncalcified or minimally calcified lesions&#46;<a class="elsevierStyleCrossRef" href="#bib0130"><span class="elsevierStyleSup">26</span></a> These authors also argue that most of the vulnerable lesions are small&#44; not significant and not visible with angiography&#46;<a class="elsevierStyleCrossRefs" href="#bib0135"><span class="elsevierStyleSup">27&#44;28</span></a> It is notable that in our series&#44; 2&#46;12&#37; of the patients with CACS &#60;10 had a stenosis &#62;50&#37;&#46; A number of studies have shown that despite the high negative predictive value of CACS for coronary events&#44; low CACS &#40;including 0 for individual cases&#41; does not exclude the existence of obstructive CAD&#46;<a class="elsevierStyleCrossRefs" href="#bib0145"><span class="elsevierStyleSup">29&#44;30</span></a> This fact&#44; along with the introduction of the latest generation of MDCT equipment that can use radiation doses below 1<span class="elsevierStyleHsp" style=""></span>mSv&#44;<a class="elsevierStyleCrossRef" href="#bib0155"><span class="elsevierStyleSup">31</span></a> opens the debate on whether to replace the quantification of coronary calcium &#40;as a surrogate marker for CAD&#41; with the direct visualization of coronary lesions using the latest-generation noninvasive MDCT angiography&#46;</p><p id="par0175" class="elsevierStylePara elsevierViewall">A recent subanalysis of asymptomatic individuals in the CONFIRM study<a class="elsevierStyleCrossRef" href="#bib0145"><span class="elsevierStyleSup">29</span></a> revealed that both CACS and MDCT significantly improved the prognostic capacity of traditional risk factors for predicting all-cause mortality and combined events&#46; Moreover&#44; CACS had a greater incremental prognostic value in the predictive model&#44; with little additional contribution from MDCT&#46; It should be noted that this study&#44; although large in scale&#44; is an open registry and that the actions of the clinicians when presented with the results of the MDCT were not reported&#46; It has been suggested that changes in the therapeutic conduct resulting from the anatomical information provided by the MDCT might influence the prognostic impact&#46;<a class="elsevierStyleCrossRef" href="#bib0150"><span class="elsevierStyleSup">30</span></a></p><p id="par0180" class="elsevierStylePara elsevierViewall">Incorporating the measurement of CAC into algorithms of cardiovascular risk prediction for low-intermediate to intermediate risk populations might represent a suitable future strategy&#46; There is a need&#44; however&#44; for more large-scale randomized studies with long-term follow-up to evaluate the role of noninvasive coronary angiography by MDCT for the identification of vulnerable patients and unstable plaques as well as its prognostic impact&#46;<a class="elsevierStyleCrossRefs" href="#bib0155"><span class="elsevierStyleSup">31&#44;32</span></a> Moreover&#44; a low CAC score means that the presence of significant coronary stenosis is unlikely&#44; while a CAC score &#62;300 can be used as a screening strategy for selecting patients for noninvasive coronary angiography&#46;</p><p id="par0185" class="elsevierStylePara elsevierViewall">The limitations of this study should be mentioned&#46; It is retrospective in nature and has a certain patient selection bias&#46; This bias is most likely caused by the probability that a high percentage of individuals who request a checkup are not at very low risk for coronary heart disease&#44; a situation that is repeated systematically in most published studies with these characteristics&#46;</p></span><span id="sec0085" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="sect0145">Conclusions</span><p id="par0190" class="elsevierStylePara elsevierViewall">The quantification of CAC by MDCT is an effective method for determining the extent and magnitude of CAD as well as for defining the predictive capacity of traditional risk factors&#46; A CAC score &#62;300 or occupying the &#8805;75th population percentile is associated with a high prevalence of significant CAD&#46;</p></span><span id="sec0090" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="sect0150">Conflicts of interest</span><p id="par0195" class="elsevierStylePara elsevierViewall">The authors declare that they have no conflicts of interest&#46;</p></span></span>"
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              "titulo" => "Coronary multidetector computed tomography"
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              "titulo" => "Coronary calcium study"
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              "titulo" => "Noninvasive coronarography"
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              "titulo" => "Analysis of coronary multidetector tomography data"
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              "titulo" => "Coronary artery calcium score and coronary artery calcium population percentile"
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              "titulo" => "Multidetector coronary computer tomography"
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            3 => "Agatston coronary calcium score"
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        "titulo" => "Abstract"
        "resumen" => "<span class="elsevierStyleSectionTitle" id="sect0010">Objectives</span><p id="spar0005" class="elsevierStyleSimplePara elsevierViewall">To confirm the value of the coronary artery calcium &#40;CAC&#41; score as an indicator of significant coronary artery disease &#40;CAD&#41; in the asymptomatic Spanish population&#44; using noninvasive coronary angiography by multidetector computed tomography &#40;MDCT&#41;&#46;</p> <span class="elsevierStyleSectionTitle" id="sect0015">Methods</span><p id="spar0010" class="elsevierStyleSimplePara elsevierViewall">This was a retrospective study of 232 asymptomatic individuals&#44; referred for a cardiovascular health checkup that included CAC and MDCT&#46;</p> <span class="elsevierStyleSectionTitle" id="sect0020">Results</span><p id="spar0015" class="elsevierStyleSimplePara elsevierViewall">Participants&#8217; mean age was 54&#46;6 years &#40;SD<span class="elsevierStyleHsp" style=""></span>&#177;<span class="elsevierStyleHsp" style=""></span>12&#46;8&#41;&#59; 73&#46;3&#37; of them were men&#46; The mean CAC value was 117&#46;8 &#40;SD<span class="elsevierStyleHsp" style=""></span>&#177;<span class="elsevierStyleHsp" style=""></span>277&#41;&#46; The individuals with arterial hypertension&#44; diabetes mellitus&#44; smoking and 3 or more risk factors had significantly greater CAC scores&#46; Some 16&#46;4&#37; of the participants were in the &#8805;75th percentile population for CAC&#46; The MDCT identified 148 individuals &#40;63&#46;8&#37;&#41; with CAD&#59; the coronary lesions were not significant in 116 individuals &#40;50&#37;&#41; and were significant &#40;&#62;50&#37; stenosis&#41; in 32 &#40;13&#46;8&#37;&#41;&#46; The participants with diabetes&#44; smoking and &#8805;3 risk vascular factors had a greater prevalence of significant stenosis&#46; The individuals with &#62;50&#37; stenosis had higher CAC values &#40;352&#46;5 vs&#46; 1&#59; <span class="elsevierStyleItalic">p</span><span class="elsevierStyleHsp" style=""></span>&#60;<span class="elsevierStyleHsp" style=""></span>&#46;0001&#41;&#44; and those in the &#8805;75th percentile had a high percentage of significant lesions &#40;57&#46;9&#37; vs&#46; 5&#46;2&#37;&#59; <span class="elsevierStyleItalic">p</span><span class="elsevierStyleHsp" style=""></span>&#60;<span class="elsevierStyleHsp" style=""></span>&#46;0001&#41;&#46; The predictors of significant CAD were a CAC score &#62;300 &#40;OR<span class="elsevierStyleHsp" style=""></span>&#61;<span class="elsevierStyleHsp" style=""></span>10&#46;9&#59; 95&#37; CI 3&#46;35&#8211;35&#46;8&#59; <span class="elsevierStyleItalic">p</span><span class="elsevierStyleHsp" style=""></span>&#61;<span class="elsevierStyleHsp" style=""></span>&#46;0001&#41;&#44; belonging to the &#8805;75th percentile &#40;OR<span class="elsevierStyleHsp" style=""></span>&#61;<span class="elsevierStyleHsp" style=""></span>5&#46;65&#59; 95&#37; CI 1&#46;78&#8211;17&#46;93&#59; <span class="elsevierStyleItalic">p</span><span class="elsevierStyleHsp" style=""></span>&#61;<span class="elsevierStyleHsp" style=""></span>&#46;03&#41; and having 3 or more vascular risk factors &#40;OR<span class="elsevierStyleHsp" style=""></span>&#61;<span class="elsevierStyleHsp" style=""></span>4&#46;19&#59; 95&#37; CI 1&#46;44&#8211;12&#46;14&#59; <span class="elsevierStyleItalic">p</span><span class="elsevierStyleHsp" style=""></span>&#61;<span class="elsevierStyleHsp" style=""></span>&#46;008&#41;&#46;</p> <span class="elsevierStyleSectionTitle" id="sect0025">Conclusion</span><p id="spar0020" class="elsevierStyleSimplePara elsevierViewall">CAC quantification is an effective method for determining the extent and magnitude of CAD and delimiting the predictive capacity of traditional risk factors&#46;</p>"
      ]
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        "resumen" => "<span class="elsevierStyleSectionTitle" id="sect0035">Objetivos</span><p id="spar0025" class="elsevierStyleSimplePara elsevierViewall">Confirmar el valor de la puntuaci&#243;n o score del calcio arterial coronario &#40;CAC&#41; como indicador de enfermedad arterial coronaria &#40;EAC&#41; significativa en poblaci&#243;n espa&#241;ola asintom&#225;tica&#44; mediante coronariograf&#237;a no invasiva por tomograf&#237;a computarizada multidetector &#40;TCMD&#41;&#46;</p> <span class="elsevierStyleSectionTitle" id="sect0040">M&#233;todos</span><p id="spar0030" class="elsevierStyleSimplePara elsevierViewall">Estudio retrospectivo de 232 individuos asintom&#225;ticos&#44; remitidos para un chequeo de salud cardiovascular que incluy&#243; CAC y TCMD&#46;</p> <span class="elsevierStyleSectionTitle" id="sect0045">Resultados</span><p id="spar0035" class="elsevierStyleSimplePara elsevierViewall">La edad media de los sujetos estudiados fue de 54&#44;6 a&#241;os &#40;DE&#58; 12&#44;8&#59; 73&#44;3&#37; varones&#41;&#46; El valor medio del CAC fue de 117&#44;8 &#40;DE&#58; 277&#41;&#46; Los individuos con hipertensi&#243;n arterial&#44; diabetes mellitus&#44; tabaquismo y con &#8805;3 factores de riesgo mostraron un CAC significativamente mayor&#46; Un 16&#44;4&#37; de los sujetos se encontraban en el percentil poblacional &#8805;75 de CAC&#46; La TCMD identific&#243; a 148 individuos &#40;63&#44;8&#37;&#41; con EAC&#44; siendo las lesiones coronarias no significativas en 116 individuos &#40;50&#37;&#41; y significativas &#40;estenosis<span class="elsevierStyleHsp" style=""></span>&#62;<span class="elsevierStyleHsp" style=""></span>50&#37;&#41; en 32 &#40;13&#44;8&#37;&#41;&#46; Los sujetos con diabetes&#44; tabaquismo y &#8805;3 factores de riesgo vascular mostraron una mayor prevalencia de estenosis significativa&#46; Los individuos con estenosis<span class="elsevierStyleHsp" style=""></span>&#62;<span class="elsevierStyleHsp" style=""></span>50&#37; presentaron valores de CAC superiores &#40;352&#44;5 vs&#46; 1&#59; p<span class="elsevierStyleHsp" style=""></span>&#60;<span class="elsevierStyleHsp" style=""></span>0&#44;0001&#41; y los de percentil &#8805;75 presentaron un alto porcentaje de lesiones &#40;57&#44;9 vs&#46; 5&#44;2&#37;&#59; p<span class="elsevierStyleHsp" style=""></span>&#60;<span class="elsevierStyleHsp" style=""></span>0&#44;0001&#41;&#46; Como variables predictoras de EAC significativa destacaron el CAC &#62;<span class="elsevierStyleHsp" style=""></span>300 &#40;OR<span class="elsevierStyleHsp" style=""></span>&#61;<span class="elsevierStyleHsp" style=""></span>10&#44;9&#59; IC95&#37;&#58; 3&#44;35-35&#44;8&#59; p<span class="elsevierStyleHsp" style=""></span>&#61;<span class="elsevierStyleHsp" style=""></span>0&#44;0001&#41;&#44; ocupar un percentil &#8805;75 &#40;OR<span class="elsevierStyleHsp" style=""></span>&#61;<span class="elsevierStyleHsp" style=""></span>5&#44;65&#59; IC95&#37;&#58; 1&#44;78-17&#44;93&#59; p<span class="elsevierStyleHsp" style=""></span>&#61;<span class="elsevierStyleHsp" style=""></span>0&#44;03&#41; y la agrupaci&#243;n de &#8805;3 factores de riesgo vascular &#40;OR<span class="elsevierStyleHsp" style=""></span>&#61;<span class="elsevierStyleHsp" style=""></span>4&#44;19&#59; IC95&#37;&#58; 1&#44;44-12&#44;14&#59; p<span class="elsevierStyleHsp" style=""></span>&#61;<span class="elsevierStyleHsp" style=""></span>0&#44;008&#41;&#46;</p> <span class="elsevierStyleSectionTitle" id="sect0050">Conclusi&#243;n</span><p id="spar0040" class="elsevierStyleSimplePara elsevierViewall">La cuantificaci&#243;n del CAC es un m&#233;todo eficaz para determinar la extensi&#243;n y magnitud de la EAC y delimitar la capacidad predictiva de los factores de riesgo tradicionales&#46;</p>"
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    "NotaPie" => array:1 [
      0 => array:2 [
        "etiqueta" => "&#9734;"
        "nota" => "<p class="elsevierStyleNotepara" id="npar0010">Please cite this article as&#58; Descalzo M&#44; Vidal-P&#233;rez R&#44; Leta R&#44; Alomar X&#44; Pons-Llad&#243; G&#44; Carreras F&#46; Utilidad del calcio arterial coronario para detectar enfermedad arterial coronaria significativa en sujetos asintom&#225;ticos&#46; Rev Clin Esp&#46; 2014&#59;214&#58;235&#8211;241&#46;</p>"
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          "en" => "<p id="spar0045" class="elsevierStyleSimplePara elsevierViewall">Sensitivity and specificity of coronary calcium determination for the diagnosis of coronary artery disease by multidetector computed tomography&#46;</p>"
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          "leyenda" => "<p id="spar0055" class="elsevierStyleSimplePara elsevierViewall"><span class="elsevierStyleItalic">Abbreviations</span>&#58; CAD&#44; premature coronary artery disease&#59; SD&#44; standard deviation&#46;</p>"
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                  \t\t\t\t" style="border-bottom: 2px solid black">Risk factors&nbsp;\t\t\t\t\t\t\n
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                  \t\t\t\t" style="border-bottom: 2px solid black"><span class="elsevierStyleItalic">n</span><span class="elsevierStyleHsp" style=""></span>&#61;<span class="elsevierStyleHsp" style=""></span>232&nbsp;\t\t\t\t\t\t\n
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                  \t\t\t\t  " align="left" valign="\n
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                  \t\t\t\t">Age&nbsp;\t\t\t\t\t\t\n
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                  \t\t\t\t">54&#46;6 &#40;DE&#58; 12&#46;8&#41;&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td></tr><tr title="table-row"><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
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                  \t\t\t\t">Gender distribution&#44; men &#40;&#37;&#41;&nbsp;\t\t\t\t\t\t\n
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                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="char" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">170 &#40;73&#46;3&#37;&#41;&nbsp;\t\t\t\t\t\t\n
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                  \t\t\t\t">Hypertension &#40;&#37;&#41;&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
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                  \t\t\t\t  " align="char" valign="\n
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                  \t\t\t\t">78 &#40;36&#46;6&#37;&#41;&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td></tr><tr title="table-row"><td class="td" title="\n
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                  \t\t\t\t">Dyslipidemia &#40;&#37;&#41;&nbsp;\t\t\t\t\t\t\n
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                  \t\t\t\t  " align="char" valign="\n
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                  \t\t\t\t">107 &#40;46&#46;1&#37;&#41;&nbsp;\t\t\t\t\t\t\n
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                  \t\t\t\t">Smoking &#40;&#37;&#41;&nbsp;\t\t\t\t\t\t\n
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                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="char" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">89 &#40;38&#46;4&#37;&#41;&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td></tr><tr title="table-row"><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">Diabetes &#40;&#37;&#41;&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="char" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">23 &#40;9&#46;9&#37;&#41;&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td></tr><tr title="table-row"><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">Family history of CAD &#40;&#37;&#41;&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="char" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">26 &#40;11&#46;2&#37;&#41;&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td></tr><tr title="table-row"><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">&#8805;3 vascular risk factors &#40;&#37;&#41;&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="char" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">45 &#40;19&#46;4&#37;&#41;&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td></tr></tbody></table>
                  """
              ]
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          "en" => "<p id="spar0050" class="elsevierStyleSimplePara elsevierViewall">Study population characteristics&#46;</p>"
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        "tabla" => array:2 [
          "leyenda" => "<p id="spar0065" class="elsevierStyleSimplePara elsevierViewall"><span class="elsevierStyleItalic">Abbreviation</span>&#58; CAD&#44; premature coronary artery disease&#46;</p>"
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            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"><td class="td" title="\n
                  \t\t\t\t\ttable-head\n
                  \t\t\t\t  " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t" style="border-bottom: 2px solid black">Risk factors&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-head\n
                  \t\t\t\t  " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t" style="border-bottom: 2px solid black">&#62;50&#37; stenosis&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-head\n
                  \t\t\t\t  " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t" style="border-bottom: 2px solid black">&#60;50&#37; stenosis&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-head\n
                  \t\t\t\t  " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t" style="border-bottom: 2px solid black"><span class="elsevierStyleItalic">p</span>-Value&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td></tr></thead><tbody title="tbody"><tr title="table-row"><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">Hypertension &#40;&#37;&#41;&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="char" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">20&#46;5&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="char" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">10&#46;4&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="char" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">&#46;056&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td></tr><tr title="table-row"><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">Dyslipidemia &#40;&#37;&#41;&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="char" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">17&#46;8&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="char" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">10&#46;4&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="char" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">&#46;15&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td></tr><tr title="table-row"><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">Smoking &#40;&#37;&#41;&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="char" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">21&#46;3&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="char" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">9&#46;1&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="char" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">&#46;015&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td></tr><tr title="table-row"><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">Diabetes &#40;&#37;&#41;&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="char" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">43&#46;5&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="char" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">10&#46;5&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="char" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">&#46;0001&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td></tr><tr title="table-row"><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">Family history of CAD &#40;&#37;&#41;&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="char" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">11&#46;5&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="char" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">14&#46;1&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="char" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">&#46;95&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td></tr><tr title="table-row"><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">&#8805;3 vascular risk factors &#40;&#37;&#41;&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="char" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">37&#46;8&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="char" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">8&#46;0&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="char" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">&#46;0001&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td></tr></tbody></table>
                  """
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      3 => array:7 [
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              "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"><td class="td" title="\n
                  \t\t\t\t\ttable-head\n
                  \t\t\t\t  " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t" style="border-bottom: 2px solid black">Coronary arterial calcium&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-head\n
                  \t\t\t\t  " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t" style="border-bottom: 2px solid black">&#60;50&#37; coronary stenosis<span class="elsevierStyleItalic">n</span><span class="elsevierStyleHsp" style=""></span>&#61;<span class="elsevierStyleHsp" style=""></span>200 &#40;&#37;&#41;&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-head\n
                  \t\t\t\t  " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t" style="border-bottom: 2px solid black">&#62;50&#37; coronary stenosis<span class="elsevierStyleItalic">n</span><span class="elsevierStyleHsp" style=""></span>&#61;<span class="elsevierStyleHsp" style=""></span>32 &#40;&#37;&#41;&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td></tr></thead><tbody title="tbody"><tr title="table-row"><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="char" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">0&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="char" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">93 &#40;100&#41;&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="char" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">0 &#40;0&#41;&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td></tr><tr title="table-row"><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="char" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">1&#8211;10&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="char" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">47 &#40;97&#46;9&#41;<a class="elsevierStyleCrossRef" href="#tblfn0005"><span class="elsevierStyleSup">a</span></a>&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="char" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">1 &#40;2&#46;1&#41;&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td></tr><tr title="table-row"><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="char" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">11&#8211;100&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="char" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">34 &#40;94&#46;4&#41;&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="char" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">2 &#40;5&#46;6&#41;&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td></tr><tr title="table-row"><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="char" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">101&#8211;300&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="char" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">15 &#40;65&#46;2&#41;&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="char" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">8 &#40;34&#46;8&#41;&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td></tr><tr title="table-row"><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="char" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">&#62;300&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="char" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">11 &#40;34&#46;4&#41;&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="char" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">21 &#40;65&#46;6&#41;&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td></tr></tbody></table>
                  """
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        "tabla" => array:2 [
          "leyenda" => "<p id="spar0080" class="elsevierStyleSimplePara elsevierViewall"><span class="elsevierStyleItalic">Abbreviation</span>&#58; CACS&#44; coronary artery calcium score&#46;</p>"
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                0 => """
                  <table border="0" frame="\n
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                  \t\t\t\t  " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t" style="border-bottom: 2px solid black">Variables&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-head\n
                  \t\t\t\t  " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t" style="border-bottom: 2px solid black">Odds ratio&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-head\n
                  \t\t\t\t  " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t" style="border-bottom: 2px solid black">95&#37; CI&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-head\n
                  \t\t\t\t  " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t" style="border-bottom: 2px solid black"><span class="elsevierStyleItalic">p</span>-Value&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td></tr></thead><tbody title="tbody"><tr title="table-row"><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">&#8805;3 vascular risk factors&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="char" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">4&#46;193&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
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                  \t\t\t\t  " align="char" valign="\n
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                  \t\t\t\t">CACS &#62;300&nbsp;\t\t\t\t\t\t\n
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                0 => "xTab509742.png"
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        "descripcion" => array:1 [
          "en" => "<p id="spar0075" class="elsevierStyleSimplePara elsevierViewall">Predictors of significant coronary arterial disease&#46;</p>"
        ]
      ]
      5 => array:5 [
        "identificador" => "tb0005"
        "tipo" => "MULTIMEDIATEXTO"
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        "texto" => array:1 [
          "textoCompleto" => "<span class="elsevierStyleSections"><span id="sec0005" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="sect0065">What we know&#63;</span><p id="par0010" class="elsevierStylePara elsevierViewall">Determining coronary calcium levels through noninvasive techniques such as multidetector computed tomography is a useful procedure for establishing the diagnosis of coronary artery disease&#46; However&#44; we do not know its sensitivity and specificity for a Spanish population of asymptomatic patients&#46;</p></span><span id="sec0010" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="sect0070">What this article provides&#63;</span><p id="par0015" class="elsevierStylePara elsevierViewall">In a university hospital in Barcelona and with a sample of 232 asymptomatic patients &#40;73&#37; men&#41; who visited for a health checkup&#44; 64&#37; had coronary atherosclerotic disease &#40;14&#37; with significant coronary lesions &#91;stenosis in an arterial lumen&#44; &#62;50&#37;&#93;&#41;&#46; The predictors of coronary artery disease were &#40;a&#41; a coronary calcium score &#62;300&#59; &#40;b&#41; being above the 75th percentile for coronary calcium content and &#40;c&#41; having 3 or more vascular risk factors&#46; Multidetector computed tomography was useful for detecting coronary artery disease in patients with high vascular risk&#46;</p><p id="par0020" class="elsevierStylePara elsevierViewall">The Editors</p></span></span>"
        ]
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                      "titulo" => "Impacto de la coronariograf&#237;a no invasiva por tomograf&#237;a computarizada con multidetectores en epidemiolog&#237;a&#58; hacia una evidencia directa del riesgo cardiovascular"
                      "autores" => array:1 [
                        0 => array:2 [
                          "etal" => false
                          "autores" => array:3 [
                            0 => "F&#46; Carreras"
                            1 => "R&#46; Leta"
                            2 => "G&#46; Pons-Llad&#243;"
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                      "doi" => "10.1016/j.rec.2013.07.007"
                      "Revista" => array:6 [
                        "tituloSerie" => "Rev Esp Cardiol"
                        "fecha" => "2013"
                        "volumen" => "66"
                        "paginaInicial" => "926"
                        "paginaFinal" => "928"
                        "link" => array:1 [
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                            "url" => "https://www.ncbi.nlm.nih.gov/pubmed/24774104"
                            "web" => "Medline"
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        "identificador" => "xack84207"
        "titulo" => "Acknowledgements"
        "texto" => "<p id="par0200" class="elsevierStylePara elsevierViewall">The authors thank Toshiba Medical Systems&#44; Spain&#44; for the technical support provided during the implementation of the studies&#46;</p>"
        "vista" => "all"
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    ]
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Article information
ISSN: 22548874
Original language: English
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