Localization of Aldosterone‐Producing Tumours in Primary Aldosteronism by Adrenal and Renal Vein Catheterization

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Abstract
Regional venous plasma aldosterone concentrations were determined and assessed against concurrent arterial levels in 16 patients with primary aldosteronism. The results obtained by sampling from the left adrenal vein or the left renal vein allowed correct side prediction of the presupposed adenoma in each patient. The problems caused by intermittent secretion of aldosterone by the tumor and the importance of correct positioning of the catheter are emphasized. Repeated sampling and continuing reference to systemic, arterial aldosterone levels proved valuable.