Renal Artery Stenosis Intervention Guidelines

Introduction to Renal Artery Stenosis

The European Society of Cardiology recommends medical therapy as the first-line treatment for atherosclerotic renal artery stenosis, with revascularization reserved for specific high-risk clinical scenarios including flash pulmonary edema, resistant hypertension despite maximal medical therapy, and progressive renal failure 1, 2

The European Heart Journal suggests percutaneous transluminal renal angioplasty (PTRA) WITHOUT stenting is the treatment of choice for fibromuscular dysplasia, with a Class IIa recommendation 1, 3
PTRA can restore renal perfusion pressure and effectively lower blood pressure in patients with fibromuscular dysplasia 1
For atherosclerotic renal artery stenosis, a stenosis is considered hemodynamically significant when ≥70% diameter stenosis by visual estimation or intravascular ultrasound, or 50-69% stenosis with post-stenotic dilatation and/or significant trans-stenotic pressure gradient 5, 6

The American College of Cardiology recommends intervention may be considered ONLY when BOTH clinical AND anatomic criteria are met, including recurrent heart failure, unstable angina, or flash pulmonary edema despite maximally tolerated medical therapy, resistant hypertension, hypertension with unexplained unilaterally small kidney or chronic kidney disease, bilateral renal artery stenosis or unilateral stenosis in a solitary viable kidney, and progressive chronic kidney disease with bilateral RAS or RAS to solitary functioning kidney 1, 5, 7
Medical therapy alone is the Class I recommendation for atherosclerotic RAS, and revascularization is only reasonable (Class IIb) when medical management has failed 2, 8

Patients must be on optimal medical therapy first, including three appropriate blood pressure medications at maximally tolerated doses, with one medication being a diuretic, before considering intervention 5

The Journal of the American College of Cardiology recommends a renal duplex ultrasound schedule within 30 days, at 6 months, at 12 months, and annually thereafter after intervention 5