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  • Title: Regulation of aldosterone secretion in primary aldosteronism.
    Author: Vetter H, Vetter W.
    Journal: Horm Metab Res; 1975 Sep; 7(5):418-24. PubMed ID: 1183923.
    Abstract:
    Plasma aldosterone, plasma renin activity and plasma cortisol were determined in patients with primary aldosteronism in response to posture and at short-time intervals overnight while the patient were supine. In the 5 patients with an aldosterone-producing adenoma postural changes in plasma aldosterone were paralleled by those in cortisol while plasma renin activity was generally undetectable indicating an ACTH-dependent secretion of aldosterone. This concept was supported by the observation that in 3 of these patients who were tested overnight 1. episodic secretion of plasma aldosterone was paralleled by those of cortisol and 2. episodic secretion of plasma aldosterone could be blunted by dexamethasone. In the patient with idiopathic adrenal hyperplasia concomittant changes in plasma aldosterone and plasma renin activity occurred. The assumption that in this patient the fluctuations in plasma aldosterone were mediated through changes in renal renin secretion was supported by the finding that episodic secretion of plasma aldosterone persisted under suppression of ACTH-secretion by dexamethasone. Our results indicate, that the described procedures may all serve as diagnostic criteria to differentiate between aldosterone-producing adenoma and idiopathic adrenal hyperplasia.
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