Treatment of Severe Carotid Disease

Introduction to Severe Carotid Disease

The American College of Cardiology recommends carotid endarterectomy (CEA) as the gold standard for symptomatic patients with ≥70% stenosis and reasonable for asymptomatic patients with >70% stenosis, provided perioperative stroke/death risk remains <6% for symptomatic and <3% for asymptomatic patients 1

Severe carotid stenosis is typically defined as ≥70% luminal narrowing by duplex ultrasound or ≥50% by angiography (NASCET criteria), with stenosis <50% not warranting revascularization except in extraordinary circumstances 1, 2

Symptomatic patients are those with ipsilateral retinal or hemispheric cerebral ischemic symptoms (TIA or stroke) within the past 6 months, while asymptomatic patients have no recent neurological symptoms referable to the stenotic artery 1, 4

The American College of Cardiology strongly recommends (Class I) CEA for symptomatic patients with 70-99% stenosis if perioperative stroke/death risk is <6%, with revascularization to be performed within 2 weeks of the index ischemic event 1, 2
Dual antiplatelet therapy with aspirin and clopidogrel is recommended for the first 21 days if not undergoing immediate revascularization, with high-intensity statin therapy and antihypertensive medication also recommended 2, 3

The American College of Cardiology recommends single antiplatelet therapy with aspirin or clopidogrel, high-intensity statin therapy, and blood pressure control for asymptomatic patients, with CEA reasonable for those with >70% stenosis if perioperative stroke/MI/death risk is low (<3%) 1, 2, 5

Noninvasive imaging (duplex ultrasound) is recommended at 1 month, 6 months, and annually after revascularization to assess patency and exclude new or contralateral lesions, with annual surveillance for patients on medical management alone 1, 2, 3

The American College of Cardiology advises against delaying antiplatelet therapy initiation while awaiting imaging or specialist consultation, pursuing revascularization if perioperative complication rates exceed 3% for asymptomatic or 6% for symptomatic patients, and attempting revascularization in patients with complete carotid occlusion 2, 3