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There were strong associations between plaque ulceration,intraluminal thrombosis,and downstream cerebral microemboli(P-.005,respectively). There were no correlations of microembolism with plaque fissuring or intraplaque hemorrhage(P=.82 and P=.28,respectively).We conclude that ulceration and liminal thrombosis of the atheromatous plaque are the main sources of downstream cerebral microemboli in patients with high-grade internal carotid artery stenosis.Our data suggest the view that these pathoanatomic features may also play a key role in symptom development. |
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