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Diffusion-weighted magnetic resonance imaging in internal carotid artery dissection
Sebastian Koch1, Alejandro A Rabinstein, Jose G Romano
1Department of Neurology, University of Miami School of Medicine, Professional Arts Center, FL 33136, USA. skoch@med.miami.edu
Archives of Neurology
|April 21, 2004
Summary
Internal carotid artery (ICA) dissection frequently causes multiple brain infarctions, often affecting border zones. This pattern suggests combined hemodynamic and embolic mechanisms in stroke.
Area of Science:
- Neurology
- Radiology
- Vascular Medicine
Background:
- Diffusion-weighted imaging (DWI) reveals acute multiple brain infarctions linked to arterial or cardiac embolism.
- Internal carotid artery (ICA) dissection is a recognized cause of ischemic stroke.
Purpose of the Study:
- To analyze DWI characteristics in patients with stroke due to ICA dissection.
- To elucidate the mechanisms of cerebral ischemia in ICA dissection.
Main Methods:
- Retrospective review of angiographic and hospital discharge data.
- Inclusion of patients with confirmed ICA dissection and DWI within 10 days of symptom onset.
- Analysis of infarct patterns based on vascular territories.
Main Results:
- 14 patients met inclusion criteria; 10 had ICA occlusion.
- Acute multiple brain infarction observed in 71% of patients.
- Border zone involvement occurred in 64% of cases, with cortical or subcortical lesions.
Conclusions:
- Acute multiple brain infarction with border zone involvement is common in ICA dissection-related strokes.
- Findings support a dual mechanism involving hemodynamics and embolism in ICA dissection strokes.