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Background With improved survival resulting from anti-retroviral therapies, accelerated coronary artery disease (CAD) has become an important cause of significant disability and premature death in HIV-infected patients. HIV+ people often accumulate epicardial adipose tissue (EAT), a metabolically-active visceral fat capable of releasing inflammatory adipokines that could contribute to CAD through local paracrine actions. We tested the hypothesis that abnormal coronary endothelial function (CEF), an early marker of atherosclerosis and predictor of CAD events, is related to the amount of local pericoronary EAT in HIV+ patients. Methods We studied 30 HIV+ subjects, 16 with no CAD ("HIVnoCAD” , 0 Calcium score by CT, mean age: 53 ± 3 years, 22 RCA segments) and 14 with known CAD ("HIV CAD”, 58 ± 4 years, 19 segments). To measure CEF, coronary MRI was performed before and during isometric handgrip exercise (IHE), an endothelialdependent stressor and % coronary cross-sectional area (CSA) change was quantified. MRI for coronary EAT local area and thickness in the atrioventricular groove was performed at the same imaging plane as that used for CEF. All data are expressed: as mean ± SEM.

Regional coronary endothelial dysfunction is related to local epicardial fat in HIV+ patients