September 10th 2008
We evaluated the prevalence of primary aldosteronism in subjects newly diagnosed with hypertension who were referred to specialized hypertension centers. An aldosterone-producing adenoma was diagnosed in the subjects with lateralized aldosterone secretion, adenoma at surgery and on pathologic evaluation, and a blood pressure fall after adrenalectomy. Evidence of excess autonomous aldosterone secretion without such criteria led to a diagnosis of idiopathic hyperaldosteronism. Aldosterone-producing adenoma and idiopathic hyperaldosteronism were conclusively diagnosed in 4.8% and 6.4% of the subjects, respectively. Thus, with a prevalence of 11.2%, primary aldosteronism is quite common in patients with newly diagnosed hypertension.