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Hypertension, Vol 16, 587-593, Copyright © 1990 by American Heart Association

ARTICLES

Pressor systems in hypertension and congestive heart failure. Role of vasopressin [clinical conference]

H Gavras
Department of Medicine, Boston University School of Medicine, MA 02118.

Elevated peripheral vascular resistance, which characterizes hypertension and congestive heart failure (the latter regardless of absolute blood pressure level) is maintained to a large extent by the combined effects of three major neurohormonal pressor mechanisms: the renin-angiotensin system, the sympathoadrenal system, and arginine vasopressin. Blockade of one of these mechanisms may lead to compensatory stimulation of the others, thus offsetting in part the hemodynamic benefits of a specific intervention. Combination therapy, designed to attack all three systems (with use of an angiotensin converting enzyme inhibitor, a sympathetic blocker such as clonidine, and an antagonist of the vasopressor action of vasopressin), may help in the treatment of such cases. To illustrate this strategy, two experimental studies, one case of malignant hypertension, and one case of congestive heart failure are presented.

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