[Occlusion of vertebral artery. About 33 cases. Therapeutic implications (authors' translation)].

33 occlusions of the vertebral artery on 29 patients were observed from 44 vertebro-basilar strokes and 20 sylvian infarcts (respectively 17 and 5 cases). 7 other cases were related to tumour, trauma or surgical ligation and were asymptomatic. In 10 out of 13 strokes could be related to a reduction of flow because of bilateral lesions onr on dominant artery. In 7 out of 9 occlusions without controlateral lesion embolism could be evoked. These results are analysed with the aim of defining indications for anastomosis on the vertebral artery.