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  • Title: A single slice measure of epicardial adipose tissue can serve as an indirect measure of total epicardial adipose tissue burden and is associated with obstructive coronary artery disease.
    Author: Tran T, Small G, Cocker M, Yam Y, Chow BJ.
    Journal: Eur Heart J Cardiovasc Imaging; 2014 Apr; 15(4):423-30. PubMed ID: 24107904.
    Abstract:
    AIMS: To evaluate the practical use of the single slice measurement of epicardial adipose tissue (EAT) at the level of the left main coronary artery (EATLM) in predicting the presence of obstructive coronary artery disease (CAD). METHODS AND RESULTS: Quantification of EATTotal and EATLM was performed on non-contrast CT scans of consecutive patients (without history of revascularization, cardiac transplantation, device implantation, and congenital heart disease) who underwent coronary artery calcium (CAC) scoring and computed tomographic coronary angiography (CTA) between May 2011 and July 2011. One hundred and ninety-two patients were evaluated, of which 47 had obstructive CAD (>50% stenosis). EATLM (3.8 ± 2.2 cm(3)) and EATTotal (126.2 ± 56.3 cm(3)) are highly correlated (r = 0.89, P < 0.001). Multivariate analysis revealed that both EATLM (OR: 1.204 per 1 cm(3), 95% CI: 1.028-1.411, P = 0.021) and EATTotal (OR: 1.007 per 10 cm(3), 95% CI: 1.000-1.013, P = 0.038) are associated with obstructive CAD. However, when the CAC score was added to multivariate analysis, both failed to show statistical significance. (EATTotal, OR 1.004 per 1 cm(3), 95% CI: 0.996-1.011, P = 0.328 and EATLM, OR: 1.136 per 10 cm(3), 95% CI: 0.948-1.362) ROC curve analysis revealed that both EATTotal and EATLM are of incremental value in detecting CAD, when compared with clinical risk scores (NCEP plus EATTotal plus BMI and NCEP plus EATLM plus BMI vs. NCEP alone; AUC 0.7090, P = 0.009 and 0.7167, P = 0.003 vs. 0.6069, respectively). CONCLUSION: Measuring epicardial adipose tissue on a single slice at the level of the left main coronary artery may serve as an indirect measure of total epicardial adipose tissue burden. EATLM and EATTotal are independently associated with obstructive coronary artery disease and are incremental to traditional risk factors for predicting its presence.
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