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. 1973 Sep;52(9):2272–2277. doi: 10.1172/JCI107414

Circadian Rhythm of Plasma Aldosterone Concentration in Patients with Primary Aldosteronism

David C Kem 1,2,3, Myron H Weinberger 1,2,3, Celso Gomez-Sanchez 1,2,3, Norman J Kramer 1,2,3, Robert Lerman 1,2,3, Shunsuke Furuyama 1,2,3, Charles A Nugent 1,2,3
PMCID: PMC333030  PMID: 4353776

Abstract

Plasma aldosterone, cortisol, and renin activity were measured in nine recumbent patients with hyperaldosteronism, including seven with adenomas, one with idiopathic hyperplasia, and one with glucocorticoid suppressible hyperplasia. All had peak values of plasma aldosterone concentration from 3 a.m. to noon and lowest values at 6 p.m. or midnight. This rhythm was similar to the circadian pattern of plasma cortisol in the same patients. When these data were normalized to eliminate the wide variation in ranges of plasma aldosterone and cortisol between individuals, there was an excellent correlation (r = + 0.87, P < 0.005) between the two hormones. In contrast, plasma aldosterone concentrations did not correlate with plasma renin activity before or after normalization of data.

Short term suppression of ACTH by administration of dexamethasone eliminated the circadian variation of plasma aldosterone in both patients with hyperplasia and in four of five patients with adenomas, while it markedly altered the rhythm in the fifth. Similar doses of dexamethasone were administered to four normal subjects and did not flatten the circadian rhythm of plasma aldosterone.

These data suggest that patients with primary aldosteronism have a circadian rhythm of plasma aldosterone mediated by changes in ACTH.

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Selected References

These references are in PubMed. This may not be the complete list of references from this article.

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