Aortogram in a 62-year-old white woman demonstrating subtotal occlusion of the left main renal artery supplying an atrophic left kidney and high-grade ostial stenosis of the proximal right renal artery from atherosclerosis. This patient presented in 1977 with a recent appearance of hypertension and a blood pressure of 170/115 mm Hg. Three years previously, when diagnosed with polycythemia vera, an IVP was normal. She was followed closely between 1974 and 1977 by her physician and was always normotensive until the hypertension suddenly appeared. A repeat rapid sequence IVP demonstrated a reduction in the size of the left kidney from 14 cm in height (1974) to 11.5 cm in height (1977). The serum creatinine was 2.6 mg/dL. The renal arteriogram shown here indicates high-grade bilateral renal artery stenosis with the left kidney measuring 11.5 cm in height, and the right kidney measuring 14.5 cm in height. Renal vein renins were obtained and lateralized strongly to the smaller left kidney. The blood pressure was well controlled with inderal and chlorthalidone. Right aortorenal reimplantation was undertaken solely to preserve renal function. Postoperatively the serum creatinine fell to 1.5 mg/dL and remained at this level for the next 13 years. Blood pressure continued to require antihypertensive medication, but was controlled to normal levels with inderal and chlorthalidone.