Evidence-based treatment of carotid artery stenosis
Kate C Young1, Anunaya Jain, Minal Jain
1Department of Neurology, University of Rochester Medical Center, Rochester, New York 14620, USA.
Insights
Carotid endarterectomy (CEA) effectively reduces stroke risk for symptomatic stenosis. Carotid angioplasty and stenting (CAS) is an alternative, but current evidence suggests it should be reserved for specific cases.
Area of Science:
- Vascular Surgery
- Neurology
- Cardiovascular Medicine
Background:
- Carotid atheromatous disease is a significant risk factor for stroke.
- Carotid endarterectomy (CEA) is a proven intervention for symptomatic carotid stenosis (>50%).
- Carotid angioplasty and stenting (CAS) is a newer alternative revascularization technique.
Purpose of the Study:
- To review randomized trials comparing CEA and CAS for stroke prevention.
- To analyze trial design and results in symptomatic and asymptomatic carotid stenosis.
- To discuss the evolving role of medical management and revascularization techniques.
Main Methods:
- Review of randomized controlled trials (RCTs) and population-based studies.
- Analysis of trial outcomes based on patient symptom status (symptomatic vs. asymptomatic).
- Evaluation of perioperative risk and patient life expectancy in treatment decisions.
Main Results:
- CEA demonstrates superiority over best medical management for symptomatic stenosis.
- Studies comparing CEA and CAS show varying results, necessitating careful trial design analysis.
- Improvements in best medical management may be reducing stroke risk in asymptomatic stenosis.
Conclusions:
- CEA remains a primary treatment for symptomatic carotid stenosis.
- CAS should be limited to specific indications due to current evidence.
- The choice of revascularization depends on symptom status and individual patient factors.
Abstract:
Carotid atheromatous disease is an important cause of stroke. Carotid endarterectomy (CEA) is a well-established option for reducing the risk of subsequent stroke due to symptomatic stenosis (> 50%). With adequately low perioperative risk (< 3%) and sufficient life expectancy, CEA may be used for asymptomatic stenosis (> 60%). Recently, carotid angioplasty and stent placement (CAS) has emerged as an alternative revascularization technique. Trial design considerations are discussed in relation to trial results to provide an understanding of why some trials were considered positive whereas others were not. This review then addresses both the original randomized studies showing that CEA is superior to best medical management and the newer studies comparing the procedure to stent insertion in both symptomatic and asymptomatic populations. Additionally, recent population-based studies show that improvements in best medical management may be lowering the stroke risk for asymptomatic stenosis. Finally, the choice of revascularization technique is discussed with respect to symptom status. Based on current evidence, CAS should remain limited to specific indications.
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