Parikh NI, Keyes MJ, Larson MG, Pou KM, Hamburg NM, Vita JA, O'Donnell CJ, Vasan RS, Mitchell GF, Hoffmann U, Fox CS, Benjamin EJ. Visceral and subcutaneous adiposity and brachial artery vasodilator function.
Obesity (Silver Spring) 2009;
17:2054-9. [PMID:
19282819 PMCID:
PMC3086764 DOI:
10.1038/oby.2009.60]
[Citation(s) in RCA: 48] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/04/2023]
Abstract
Endothelial dysfunction may link obesity to cardiovascular disease (CVD). We tested the hypothesis that visceral abdominal tissue (VAT) as compared with subcutaneous adipose tissue (SAT) is more related to endothelium-dependent vasodilation. Among Framingham Offspring and Third Generation cohorts (n = 3,020, mean age 50 years, 47% women), we used multivariable linear regression adjusted for CVD and its risk factors to relate computed tomography (CT)-assessed VAT and SAT, BMI, and waist circumference (WC), with brachial artery measures. In multivariable-adjusted models, BMI, WC, VAT, and SAT were positively related to baseline artery diameter and baseline mean flow velocity (all P < 0.001), but not hyperemic mean flow velocity. In multivariable-adjusted models, BMI (P = 0.002), WC (P = 0.001), and VAT (P = 0.01), but not SAT (P = 0.24) were inversely associated with percentage of flow-mediated dilation (FMD%). However, there was little incremental increase in the proportion of variability explained by VAT (R(2) = 0.266) as compared to SAT (R(2) = 0.265), above and beyond traditional risk factors. VAT, but not SAT was associated with FMD% after adjusting for clinical covariates. Nevertheless, the differential association with VAT as compared to SAT was minimal.
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