Stroke prevention by surgery for symptomatic disease in carotid territory
1John P. Robarts Research Institute, London, Ontario, Canada.
Abstract:
The benefit of surgical procedures in preventing stroke is of concern to physicians, surgeons, and all health-care providers. The multicenter randomized trial has been applied in evaluating these strategies. Extracranial-intracranial anastomosis has failed to measure up to this rigid form of scientific scrutiny and the reasons for the demise of this procedure are reviewed. By contrast, for symptomatic disease of the internal carotid artery, patients with very severe stenosis are better treated by endarterectomy than with medical care alone. The ongoing North American Symptomatic Carotid Endarterectomy Trial (NASCET) is reviewed and the compelling reasons to continue the trial for patients with moderate disease are outlined.
Insights
Surgical intervention for carotid artery disease shows mixed results. While extracranial-intracranial bypass has largely failed, carotid endarterectomy is superior for severe symptomatic stenosis.
Area of Science:
- Neurology
- Vascular Surgery
- Clinical Trials
Background:
- Stroke prevention is a critical concern for healthcare providers.
- Evaluating surgical interventions requires rigorous scientific scrutiny, often through multicenter randomized trials.
- The efficacy of various surgical procedures for cerebrovascular disease is under continuous investigation.
Purpose of the Study:
- To review the outcomes of surgical procedures for preventing stroke.
- To analyze the reasons for the failure of extracranial-intracranial anastomosis.
- To present evidence supporting carotid endarterectomy for symptomatic internal carotid artery stenosis.
Main Methods:
- Review of multicenter randomized trials.
- Analysis of data from the North American Symptomatic Carotid Endarterectomy Trial (NASCET).
- Evaluation of surgical versus medical management strategies.
Main Results:
- Extracranial-intracranial anastomosis has not met scientific expectations for stroke prevention.
- Carotid endarterectomy demonstrates superior outcomes compared to medical management alone in patients with very severe symptomatic internal carotid artery stenosis.
Conclusions:
- Extracranial-intracranial bypass is not a recommended surgical strategy for stroke prevention.
- Carotid endarterectomy is the preferred treatment for patients with very severe symptomatic internal carotid artery stenosis.
- Continued investigation via the NASCET trial is warranted for patients with moderate disease to refine treatment guidelines.
