Hypertension, Vol 6, 743-754, Copyright © 1984 by American Heart Association
GM London, ME Safar, JE Sassard, JA Levenson and AC Simon
Cardiac output (CO), renal blood flow (RBF), calf blood flow (CBF), and
hepatic blood flow (HBF), glomerular filtration rate (GFR), and dopamine
beta hydroxylase (D beta H) activity were studied in 198 men (67
normotensive controls and 131 hypertensive patients) of the same age with
sustained uncomplicated essential hypertension. In the hypertensive men,
the RBF and the RBF/CO ratio were significantly decreased (p less than
0.001). The RBF and RBF/CO ratio were negatively correlated with age (p
less than 0.01), blood pressure (p less than 0.01), and D beta H activity
(p less than 0.01). None of these relationships were observed with CBF and
HBF. The observed decreases in RBF and the RBF/CO ratio in hypertensive men
were reversed after administration of clonidine and alpha-methyldopa (p
less than 0.01), but not after administration of propranolol. The study
provides evidence that the reduction of renal perfusion in essential
hypertension is partly reversible and related to an abnormality in the
adrenergic system control.
ARTICLES
Renal and systemic hemodynamics in sustained essential hypertension
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