A 64-year-old man with long-standing hypertension and progre…
A 64-year-old man with long-standing hypertension and progressive renal insufficiency presents for evaluation. Blood pressure remains elevated at 172/96 mmHg despite lisinopril, amlodipine, and hydrochlorothiazide. Physical exam reveals a right-sided abdominal bruit.Labs:BUN 34 mg/dLCreatinine 2.1 mg/dL (previously 1.3 mg/dL six months ago) Renal ultrasound shows asymmetric kidney size, and duplex Doppler demonstrates reduced flow velocity in the right renal artery.Which of the following is the most common cause of this patient’s condition?