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BACKGROUNDMechanisms underlying the heightened myocardial infarction risk among HIV-infected women (versus non-HIV-infected women) remain unclear. Our objectives were to assess epicardial adipose tissue (EAT) volume and its associations among asymptomatic women with and without HIV.METHODSA total of 55 HIV-infected and 27 non-HIV-infected women without known cardiovascular disease who underwent cardiac CT and metabolic/immune phenotyping were included. EAT volume derived from CT was compared among women with and without HIV, and within-group EAT associations were assessed. Next, immune and atherosclerotic plaque parameters were compared among groups stratified by HIV serostatus and high/low EAT (defined in reference to median EAT for each serostatus group).RESULTSAsymptomatic HIV-infected women and age-matched non-HIV-infected women with comparable mean body mass index (28 ±1 versus 29 ±1 kg/m2) had similar median (IQR) volumes of EAT (54 [41-79] versus 65 [41-78] cm3; P>0.05); however, different within-group associations were noted. Markers of monocyte activation/arterial inflammation differed by HIV serostatus/EAT volume subgroup (CXCL10 [P=0.02], sCD163 [P=0.004], sCD14 [P=0.03], Lp-PLA2 [P=0.04]; P for overall ANOVA) and were highest among HIV-infected women with excess EAT (versus HIV-infected women without excess EAT, non-HIV-infected women with excess EAT and non-HIV-infected women without excess EAT). The percentage of segments with non-calcified coronary plaque also differed by HIV serostatus/EAT volume subgroup and was highest among HIV-infected women with excess EAT.CONCLUSIONSAsymptomatic women with and without HIV have similar volumes of EAT, but drivers of EAT may differ between groups. HIV-infected women with excess EAT have highest-level immune activation and the highest percentage of non-calcified plaque. Future studies are needed to determine whether EAT contributes pathogenetically to HIV-associated cardiovascular disease in women.

Epicardial Adipose Tissue Volume and Cardiovascular Risk Indices among Asymptomatic Women with and without HIV