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Am J Physiol Heart Circ Physiol 271: H469-H477, 1996;
0363-6135/96 $5.00
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AJP - Heart and Circulatory Physiology, Vol 271, Issue 2 469-H477, Copyright © 1996 by American Physiological Society

ARTICLES

Peripheral artery structure and endothelial function in heart failure: effect of ACE inhibition

P. Mulder, L. Elfertak, V. Richard, P. Compagnon, B. Devaux, J. P. Henry, E. Scalbert, P. Desche, B. Mace and C. ThuilleZ
Department of Pharmacology, Rouen University Medical School, France.

Chronic heart failure (CHF) induces peripheral vasoconstriction and impairs endothelium-dependent relaxation of large arteries. We investigated in a rat model of CHF (coronary artery ligation) 1) whether endothelial dysfunction also exists in resistance arteries, 2) whether this is associated with vascular morphological changes, and 3) the effect of angiotensin-converting enzyme (ACE) inhibition on these parameters. After 1 mo or 1 yr, CHF reduced the vasodilatory response to acetylcholine of isolated, perfused femoral and mesenteric artery segments. This impairment was more marked in femoral than in mesenteric arteries. However, CHF did not induce any arterial remodeling. Chronic treatment with the ACE inhibitor perindopril improved the response to acetylcholine and reduced media cross-sectional area and collagen density. Thus at the level of small peripheral arteries, CHF induces an endothelial dysfunction but does not affect vascular structure. ACE inhibition prevents the CHF-induced endothelial dysfunction and induces vascular remodeling. These changes could contribute to the observed beneficial effects of ACE inhibitors on hemodynamics and survival in CHF.


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