PMID: 8963729May 1, 1996Paper

Endothelium-dependent and -independent vasodilation of large arteries in normoalbuminuric insulin-dependent diabetes mellitus

Arteriosclerosis, Thrombosis, and Vascular Biology
J LambertC D Stehouwer

Abstract

Vascular complications in diabetes mellitus are associated with endothelial dysfunction. Whether endothelium-dependent vasodilation is impaired in normoalbuminuric patients with insulin-dependent diabetes mellitus (IDDM) is controversial. Using a noninvasive echo-Doppler method, we investigated endothelium-dependent and endothelium-independent vasodilation in the brachial artery of IDDM patients. There were 52 normoalbuminuric and normotensive patients with IDDM (aged 31.9 +/- 9.8 years; diabetes duration, 14.9 +/- 7.9 years; glycated hemoglobin, 7.9 +/- 1.2%) and 52 healthy control group (C) subjects comparable for age and sex studied. Brachial artery diameter was measured at baseline, during postocclusion reactive hyperemia (flow-mediated, endothelium-dependent dilation [FMD]), and after 400 micrograms glyceryl trinitrate (GTN) sublingually (endothelium-independent vasodilation). Vasodilation was expressed as the percentage change relative to the baseline diameter. Baseline flow and blood pressure were similar for IDDM patients and C. Baseline vessel diameter was slightly larger in IDDM patients (3.10 +/- 0.52 mm) compared with C (2.89 +/- 0.55 mm, P = 5.0). FMD in IDDM patients was decreased (12.0 +/- 9.1% versus 15.7 +/- 9....Continue Reading

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