Impairment of Blood Pressure Control in Patients with Liver Cirrhosis during Tilting: Study on Adrenergic and Renin-Angiotensin Systems
- 1 January 1982
- journal article
- research article
- Published by S. Karger AG in Digestion
- Vol. 25 (2), 124-130
- https://doi.org/10.1159/000198820
Abstract
Mean arterial pressure, phenylalanine, tyrosine, norepinephrine and plasma renin activity (PRA) were determined in the plasma of 6 healthy controls and 8 patients with liver cirrhosis receiving a controlled Na intake (40 meq/day), after 1 h of bed rest and 10 min after being tilted up at 90.degree.. After resting, patients showed lower arterial pressure (P < 0.025) and higher plasma levels of phenylalanine (P < 0.005), tyrosine (P < 0.05), norepinephrine (n.s. [not significant]) and PRA (n.s.) than controls. In spite of a prolonged and marked stimulation of the adrenergic system induced by tilting, arterial pressure of cirrhotics, after an initial increase, decreased significantly. A significant PRA increase was observed in both groups but in patients it was greater and lasted longer, up to 30 min, when PRA and arterial pressure were inversely and significantly correlated. The adrenergic system of cirrhosis then appeared unable to maintain adequate levels of arterial pressure, even though hyperstimulated. The renin-angiotensin system played an important compensatory role in this contest.This publication has 8 references indexed in Scilit:
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