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Vasodilation and visceral fat in elderly subjects: the Prospective Investigation of the Vasculature in Uppsala Seniors (PIVUS) study.

Abstract：

BACKGROUND:Although obesity has long been recognised as a cardiovascular risk factor, only in recent years has the role of visceral adipose tissue (VAT) been evaluated. In the Prospective Study of the Vasculature in Uppsala Seniors (PIVUS) study, we related VAT and other obesity indices to endothelium-dependent vasodilation in both capacitance and resistance arteries. METHODS AND RESULTS:In this population-based study, 1016 subjects aged 70 were evaluated by the invasive forearm technique with acetylcholine (EDV) and brachial artery ultrasound to assess flow-mediated vasodilation (FMD). Intra-abdominal visceral (VAT) and subcutaneous adipose tissue (SAT) were determined by magnetic resonance imaging in a random sample of 287 subjects. EDV, but not FMD, was inversely related to VAT, SAT, BMI and the waist/hip ratio (r=-0.23, -0.16, -0.21 and -0.11, respectively, p=0.05-0.001 after adjustment for gender). In multiple regression analysis however, only VAT was an independent predictor of EDV. Similar results were obtained for endothelium-independent vasodilation (EIDV, infusion of sodium nitroprusside in the brachial artery). CONCLUSIONS:Both endothelium-dependent and independent vasodilation in the forearm resistance arteries, but not FMD in the brachial artery, was reduced in elderly subjects with increased intra-abdominal adipose tissue mass. This finding suggests deterioration in general vasoreactivity mainly in resistance arteries in elderly subjects with intra-abdominal obesity.

journal_name

Atherosclerosis

journal_title

Atherosclerosis

authors

Lind L,Johansson L,Hulthe J,von Below C,Ahlström H

doi

10.1016/j.atherosclerosis.2006.09.010

subject

Has Abstract

pub_date

2007-10-01 00:00:00

pages

e64-71

issue

2

eissn

0021-9150

issn

1879-1484

pii

S0021-9150(06)00555-7

journal_volume

194

pub_type

杂志文章

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