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4.
Lancet ; 1(8109): 173-7, 1979 Jan 27.
Article in English | MEDLINE | ID: mdl-84203

ABSTRACT

The renal abnormality which causes hypertension in the Milan hypertensive strain of rats disappears as hypertension develops. Because of the many analogies between the condition in these rats and "essential" hypertension in man, the same pattern of change may occur if a renal abnormality is the cause of essential hypertension in man. This hypothesis was tested in two groups of young normotensive subjects matched for age, sex, and body-surface area; in the first group both parents were hypertensive, and in the second group both parents were normotensive. Renal plasma-flow, glomerular filtration-rate, plasma-volume, plasma-renin activity, plasma-concentrations of Na+, K+, and catecholamines, 24 h urinary excretion of Na+, K+, and aldosterone, and the cardiac index were measured so that renal function and the role of factors affecting blood-pressure regulation could be assessed. Renal plasma-flow was significantly higher (p less than 0.01) in the first group, whereas results of tests for all the other factors were almost the same in both groups. The hypothesis that a primary kidney abnormality causes hypertension in a proportion of patients with essential hypertension is proposed.


Subject(s)
Blood Pressure , Hypertension/etiology , Kidney/abnormalities , Adult , Aldosterone/urine , Animals , Cardiac Output , Catecholamines/blood , Female , Glomerular Filtration Rate , Heart Rate , Humans , Hypertension/genetics , Kidney/blood supply , Kidney/physiopathology , Kidney Function Tests , Male , Plasma Volume , Potassium/metabolism , Rats , Regional Blood Flow , Renin/blood , Sodium/metabolism
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