Evaluation and Management of Primary Hyperaldosteronism.

Primary hyperaldosteronism is an important and increasingly prevalent cause of hypertension that is characterized by unregulated aldosterone excess. More than 90% of primary hyperaldosteronism cases are attributable to either idiopathic adrenal hyperplasia or aldosterone-producing adenomas. The approach to the diagnosis of primary hyperaldosteronism should be step-wise, starting with screening of at-risk populations, confirmatory testing for positively screened patients, and subtype classification in order to direct surgical or medical management. Based on current guidelines, subtype classification of primary hyperaldosteronism should be determined with both imaging and adrenal vein sampling (AVS), reserving deferment of AVS for a selective subset of patients.