Indications for cerebral revascularization for patients with atherosclerotic carotid occlusion
Colin P Derdeyn1, Robert L Grubb, William J Powers
1Mallinckrodt Institute of Radiology and Department of Neurology, Washington University School of Medicine, St. Louis, Missouri 63110, USA. derdeync@wustl.edu
Insights
Patients with complete carotid artery occlusion and recent stroke symptoms face high risks. This article reviews treatments like bypass and angioplasty, focusing on hemodynamic factors for stroke prevention.
Area of Science:
- Neurology
- Vascular Surgery
- Interventional Cardiology
Background:
- Complete carotid artery occlusion with recent ischemic symptoms indicates a high risk of recurrent stroke.
- Severe hemodynamic impairment due to inadequate collateral circulation exacerbates stroke risk in these patients.
Purpose of the Study:
- To review the evidence for surgical and interventional treatments in patients with complete carotid occlusion.
- To discuss the role of physiologic imaging in identifying high-risk patients based on hemodynamic factors.
Main Methods:
- Literature review of studies on extracranial to intracranial arterial bypass.
- Analysis of evidence for endarterectomy, angioplasty, and stenting of various arteries to improve collateral flow.
- Discussion of the application of physiologic imaging techniques.
Main Results:
- Evidence for specific interventions in complete carotid occlusion is evaluated.
- The importance of hemodynamic assessment for patient stratification is highlighted.
Conclusions:
- Treatment decisions for complete carotid occlusion should consider hemodynamic status.
- Physiologic imaging can aid in selecting patients who may benefit from interventions to improve collateral flow and reduce stroke risk.
Abstract:
Patients with complete carotid occlusion and recent ischemic symptoms are at high risk for subsequent stroke, particularly those with evidence of severe hemodynamic impairment due to poor collateral flow. Treatment options for these patients include direct extracranial to intracranial arterial bypass, or interventions aimed at improving collateral sources of flow such as endarterectomy or angioplasty and stenting of the ipsilateral external carotid artery, the contralateral carotid artery, or the vertebral arteries. The evidence supporting the use of these procedures for patients with complete occlusion of the carotid artery will be the focus of this article. The use of physiologic imaging to select subgroups of patients at high risk due to hemodynamic factors will also be discussed.
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