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Carotid artery stenting:the need for randomised trials
1Institute of Neurology, University College London, London, UK. m.brown@ion.ucl.ac.uk
Cerebrovascular Diseases (Basel, Switzerland)
|June 5, 2004
Summary
Carotid stenting for carotid artery stenosis shows no major outcome difference compared to carotid endarterectomy, but carries higher procedural risks. Further trials are needed to determine if newer techniques improve safety and efficacy for this condition.
Area of Science:
- Vascular Surgery
- Interventional Cardiology
- Neurology
Background:
- Carotid artery stenosis poses a significant stroke risk.
- Carotid endarterectomy is the established treatment, but carries surgical risks.
- Endovascular treatment, including stenting, offers an alternative but faces acceptance challenges due to safety concerns.
Purpose of the Study:
- To evaluate the safety and efficacy of endovascular treatment versus carotid endarterectomy for carotid artery stenosis.
- To address concerns regarding procedural risks and long-term outcomes of carotid stenting.
- To inform future treatment guidelines and the need for further randomized trials.
Main Methods:
- Review of randomized trials, including the Carotid and Vertebral Artery Transluminal Angioplasty Study (CAVATAS).
- Analysis of procedural stroke/death rates and stroke during follow-up.
- Assessment of restenosis rates and comparison of outcomes between endovascular and surgical interventions.
Main Results:
- No significant difference in major outcome events between endovascular treatment and carotid endarterectomy.
- Higher rates of procedural stroke or death observed with endovascular treatment.
- Increased frequency of severe ipsilateral carotid stenosis one year after endovascular treatment compared to surgery.
Conclusions:
- Current evidence does not support replacing carotid endarterectomy with stenting as the standard treatment.
- Advances in stenting technology are ongoing, but evidence of reduced stroke rates is limited.
- Further large-scale randomized trials, including planned meta-analyses of ongoing studies, are crucial to definitively compare carotid stenting and endarterectomy.