Mechanisms of ischemic stroke secondary to large artery atherosclerotic disease
1Washington University School of Medicine, Mallinckrodt Institute of Radiology, 510 South Kingshighway Boulevard, St Louis, MO 63110, USA. derdeync@wustl.edu
Insights
Atherosclerosis in neck and brain arteries causes ischemic stroke via plaque-related clots or low blood flow. Understanding these mechanisms is key for revascularization treatments and patient selection.
Area of Science:
- Cerebrovascular disease
- Neurology
- Vascular surgery
Background:
- Atherosclerotic occlusive disease affects cervical and intracranial arteries.
- Ischemic stroke results from thromboembolism or hemodynamic failure (low flow).
Purpose of the Study:
- To discuss evidence linking atherosclerotic mechanisms to cerebral ischemia.
- To explore the synergistic effects of thromboembolism and impaired hemodynamics.
- To highlight the importance of understanding these mechanisms for revascularization rationale.
Main Methods:
- Literature review and evidence synthesis.
- Discussion of existing research on atherosclerotic mechanisms and cerebral ischemia.
Main Results:
- Atherosclerotic plaque can cause local thrombosis or embolism.
- Hemodynamic failure (low flow) is another significant mechanism.
- Evidence suggests synergistic effects between thromboembolism and impaired hemodynamics.
Conclusions:
- Understanding these dual mechanisms is crucial for guiding revascularization strategies.
- Biologic imaging and hemodynamic assessment will aid in patient risk stratification.
- Physiologically based patient selection for intervention is the future direction.
Abstract:
Atherosclerotic occlusive disease of the cervical and intracranial arteries leads to ischemic stroke through two separate, but interrelated, mechanisms: local thrombosis or embolism from atherosclerotic plaque, and hemodynamic failure (low flow). In this article, the author discusses the evidence linking these two mechanisms with cerebral ischemia, and the evidence for the synergistic effects of thromboembolism and impaired hemodynamics. An understanding of these two mechanisms is important because these mechanisms provide the rationale for revascularization for patients who have atherosclerotic stenosis or occlusion. In addition, the biologic imaging of atherosclerotic plaques and hemodynamic assessment eventually will play an important role in stratifying patient risk and guiding physiologically based patient selection for intervention.
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