Figure 2.
Simplified algorithm for PA screening and triaging based primarily on plasma renin and secondarily on serum aldosterone. Aldo, aldosterone; BP, blood pressure; CVA, cerebrovascular accident; DRC, direct renin concentration; FH, family history; MR, mineralocorticoid receptor; PA, primary aldosteronism; PRA, plasma renin activity. Patients with low renin and aldosterone >10 ng/dL are referred for confirmatory testing and subtyping; most patients with aldosterone >20 ng/dL have PA, and those with hypokalemia do not require confirmatory testing.