What is the Best Criterion for the Interpretation of Adrenal Vein Sample Results in Patients with Primary Hyperaldosteronism

Background In patients with primary hyperaldosteronism, adrenal vein sampling (AVS) has emerged as a gold standard for distinguishing between unilateral and bilateral disease, but multiple criteria have been used and no consensus exists as to the most accurate criterion. The objective of this study was to determine which AVS criteria most accurately identify patients with unilateral surgical disease and are associated with significant clinical improvement after adrenalectomy.