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Stroke, Vol 12, 627-630, Copyright © 1981 by American Heart Association

ARTICLES

Transient ischemic attacks and external carotid artery. A retrospective study of 23 patients with an occlusion of the internal carotid artery

J Bogousslavsky, F Regli, JP Hungerbuhler and R Chrzanowski

Twenty-three patients with occlusion of an internal carotid artery have been followed 5 to 50 months after angiography. None had a later permanent stroke. Eight had delayed TIAs in the occluded internal carotid area, never in another area. In these TIAs the role of the homolateral external carotid artery is emphasized, because in the 8 cases this artery was the main collateral to the occluded internal carotid, and angiography had shown atheromatous stenosis of homolateral external/common carotid arteries or an irregular stump at the site of the occlusion. Hemodynamic and embolic mechanisms are discussed, especially the latter, because of the absence of severe stenosis and evidence of emboligenic plaques.

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