A 67-year-old male with a 15-year history of hypertension (HTN), overweight, and a 26-year history of hyperlipidemia recently presented with mild bilateral renal atrophy, serum creatinine (Cr) 280 μmol/L, blood urea nitrogen (BUN) 9.7 mmol/L. Renal artery angiography revealed localized stenosis of bilateral renal arteries. The most appropriate management is: