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Updated: May 23, 2026
06:01
A Thrombotic Stroke Model Based On Transient Cerebral Hypoxia-ischemia
Published on: August 18, 2015
Cerebral hemodynamics in acute stroke: pathophysiology and clinical implications
Georgios Tsivgoulis1, Andrei V Alexandrov
1Comprehensive Stroke Center, University of Alabama at Birmingham Hospital, Birmingham, AL (GT, AVA) and Department of Neurology, University of Athens, Athens, Greece (GT).
Journal of Vascular and Interventional Neurology
|April 21, 2012
Summary
Assessing cerebral autoregulation and cerebrovascular reserve (CVR) is vital for stroke risk stratification. Impaired autoregulation in carotid disease increases stroke risk, guiding revascularization therapy decisions.
Area of Science:
- Neuroscience
- Vascular Biology
- Medical Imaging
Background:
- Cerebral autoregulation is a critical brain mechanism protecting against ischemia by regulating blood flow.
- It compensates for metabolic demands and changes in cerebral perfusion pressure.
Purpose of the Study:
- To review methods for assessing cerebral blood flow and autoregulation.
- To understand the clinical implications of impaired cerebral autoregulation.
Main Methods:
- Systematic review of existing data on cerebral blood flow and autoregulation assessment techniques.
- Discussion of non-invasive methods for estimating cerebrovascular reserve (CVR).
Main Results:
- Cerebral autoregulation is complex, involving myogenic, neuronal, endothelial, and metabolic factors.
- Various non-invasive CVR estimation methods exist (PET, TCD, P-MRI, SPECT, Xenon-CT), each with pros and cons.
- Impaired autoregulation in carotid stenosis/occlusion correlates with increased stroke/TIA risk.
Conclusions:
- CVR assessment aids in stratifying stroke/TIA risk and identifying candidates for revascularization.
- Cerebral vasoreactivity testing can evaluate autoregulation post-revascularization, serving as a surrogate endpoint.
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