Primary hyperaldosteronism.
Abstract
To characterize the syndrome of primary aldosteronism and summarize diagnostic and therapeutic strategies. We review the mechanisms of action of aldosterone and outline features that distinguish the major subtypes of aldosteronism. The state of aldosterone excess should be suspected in every patient manifesting hypertension and hypokalemia. The documentation of low renin activity and high plasma aldosterone concentration in such patients suggests the presence of primary aldosteronism. Lack of appropriate suppression of plasma aldosterone after saline infusion is thought to be the best maneuver for confirming primary aldosteronism. Nonetheless, a similar lack of aldosterone suppressibility after either oral salt loading for 3 days or oral administration of a single 25-mg dose of captopril may help achieve the same purpose. Once primary aldosteronism has been diagnosed, the distinction between two major subtypes--unilateral adrenal adenoma or Conn's syndrome and bilateral idiopathic adrenal hyperplasia--is important because of the difference in management. Certain physiologic maneuvers, such as change of posture from supine to upright, oral administration of cyproheptadine, and radiologic localization with several techniques incl...Continue Reading
References
The product of the CYP11B2 gene is required for aldosterone biosynthesis in the human adrenal cortex
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