Association of Epicardial Fat With Cardiovascular Risk Factors and Incident Myocardial Infarction in the General Population

• DOI: 10.1016/j.jacc.2012.11.062
• Publication Date: 2013-02-20T22:50:25Z
• Authors: Amir A. Mahabadi; Marie H. Berg; Nils Lehmann; Hagen Kälsch; Marcus Bauer; Kaffer Kara; Nico Dragano; Susanne Moebus; Karl-Heinz Jöckel; Raimund Erbel; Stefan Möhlenkamp
• Keywords: Male; epicardial fat; Medizin; Myocardial Infarction; Middle Aged; Risk Assessment; Plaque, Atherosclerotic; 3. Good health; Radiography; risk prediction; 03 medical and health sciences; myocardial infarction; 0302 clinical medicine; Heinz Nixdorf Recall study; Adipose Tissue; Risk Factors; Humans; epidemiology; Female; Cardiology and Cardiovascular Medicine; Life Style; Pericardium; Aged

This study sought to determine whether epicardial fat volume predicts coronary events in the general population.Epicardial adipose tissue (EAT) is suggested to promote plaque development in the coronary artery tree.We quantified EAT volume in participants from the prospective population-based Heinz Nixdorf Recall cohort study free of cardiovascular disease. Incident coronary events were assessed during a follow-up period of 8.0 ± 1.5 years. Multivariable association of EAT with cardiovascular risk factors, coronary artery calcification (CAC), and coronary events was assessed using regression analysis.From the overall 4,093 participants (age 59.4 years, 47% male), 130 subjects developed a fatal or nonfatal coronary event. Incidence of coronary events increased by quartile of EAT (0.9% vs. 4.7% for 1(st) and 4th quartile, respectively, p < 0.001). Doubling of EAT was associated with a 1.5-fold risk of coronary events when adjusting for cardiovascular risk factors (hazard ratio [HR] [95% confidence interval (CI)]: 1.54 [1.09 to 2.19]), which remained unaltered after further adjustment for CAC score (HR [95% CI]: 1.50 [1.07 to 2.11]). For discrimination of subjects with events from those without, we observed a trend for improvement of Harrell's C and explained variance by EAT over traditional cardiovascular risk factors, which, however, did not reach statistical significance (0.720 to 0.730 for risk factors alone and with EAT added, respectively, p = 0.10, R(2) = 2.73% to R(2) = 2.92%, time-dependent integrated discrimination improvement = 0.196%).Epicardial fat is associated with fatal and nonfatal coronary events in the general population independent of traditional cardiovascular risk factors and complements information from cardiac computed tomography above the CAC score.