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Stroke with internal carotid artery stenosis.
A Tsiskaridze1, G Devuyst, G R de Freitas
1Department of Neurology, Centre Hospitalier Universitaire Vaudois, Lausanne, Switzerland.
Archives of Neurology
|May 1, 2001
Summary
Stroke subtypes vary with carotid artery stenosis severity. Moderate stenosis links to large hemispheral infarcts, while severe stenosis is associated with border zone infarcts, highlighting embolism and hemodynamic factors.
Area of Science:
- Neurology
- Vascular Medicine
- Stroke Research
Background:
- Systematic studies on stroke patterns related to carotid stenosis degrees are lacking.
- Understanding these patterns is crucial for stroke prevention and treatment.
Purpose of the Study:
- To investigate first-ever stroke subtypes in patients with extracranial internal carotid artery (ICA) stenosis.
- To correlate stroke patterns with varying degrees of ICA stenosis using a stroke registry.
Main Methods:
- Analysis of 173 first-ever stroke patients with 50% or greater ICA stenosis from the Lausanne Stroke Registry.
- Utilized Doppler ultrasonography, carotid angiography, and neuroimaging (CT/MRI) for diagnosis.
Main Results:
- Infarct subtypes included anterior pial (31%), subcortical (20%), posterior pial (19%), large hemispheral (12%), and border zone (10%).
- Moderate ICA stenosis (50%-69%) correlated with large hemispheral infarcts.
- Severe ICA stenosis (90%-99%) showed a trend towards border zone infarcts.
Conclusions:
- Large hemispheral infarcts associated with moderate ICA stenosis suggest embolism or poor collateral flow.
- Border zone infarcts linked to severe ICA stenosis emphasize the role of hemodynamic disturbances in stroke pathogenesis.