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Changes in Endocrine Activities Relative to Obesity in Patients with Essential Hypertension *
Author(s) -
Hiramatsu Kunihide,
Yamada Takashi,
Ichikawa Kazuo,
Izumiyama Tomio,
Nagata Hajime
Publication year - 1981
Publication title -
journal of the american geriatrics society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.992
H-Index - 232
eISSN - 1532-5415
pISSN - 0002-8614
DOI - 10.1111/j.1532-5415.1981.tb02389.x
Subject(s) - medicine , aldosterone , endocrinology , plasma renin activity , essential hypertension , blood pressure , obesity , population , weight loss , renin–angiotensin system , environmental health
ABSTRACT The possible role of obesity in the development of hypertension was investigated in two study groups. In a population study of 961 subjects, 739 were found to be normotensive and 222 hypertensive. The prevalence of hypertension was 18.7 percent in the nonobese, and 33.2 percent in the obese subjects. Systolic and diastolic blood pressures increased progressively with the increase of relative body weight in both normotensive and hypertensive subjects. In addition, an endocrinologic study was made of 97 patients with essential hypertension; in 82, plasma renin activity (PRA) was inversely correlated with the increase of relative body weight but not with urinary Na excretion. Despite this decrease of PRA, the level of serum aldosterone was not influenced by relative body weight. Thus, the aldosterone/PRA ratio increased progressively with the increase of relative body weight. Thiazide therapy normalized this inappropriately high ratio, and reduced body weight and blood pressure. Restriction of dietary calories and salt intake had a similar effect. With a high‐salt intake in an obese subject, the aldosterone/PRA ratio is unduly increased. Apparently aldosterone contributes to the additional retention of sodium and water and thereby promotes hypertension in the presence of an expanded fluid volume.