Abstract
We studied the pathogenesis of hypertension in two patients with hepatitis-B surface antigen-positive systemic necrotizing vasculitis. Both presented with hypertension, hypokalemia, and renal potassium wasting. Plasma renin activity and urinary aldosterone levels were markedly elevated. Renal arteriograms showed widespread microaneurysms, and necrotizing vasculitis involving renal arteries was confirmed histologically. Hypertension was refractory to conventional treatment in both patients. In one patient, hypertension was easily controlled with the angiotension-converting enzyme inhibitor captopril. Diffuse renal vasculitis with secondary hyperreninemia and hyperaldosteronism appears to be an important cause of hypertension in patients with systemic necrotizing vasculitis.
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