Fourteen patients who underwent occipital to posterior inferior cerebellar arterial bypass are reviewed. All of the patients were treated for severe vertebrobasilar ischemia secondary to lesions of the distal vertebral artery. There was no operative death or permanent postoperative morbidity. On follow-up evaluation (averaging 13 months after operation), there has been 100% graft patency and a noticeable improvement in the neurological function in all patients. Operating with the patient in the prone position and avoiding intraoperative hypotension help to minimize the operative morbidity from this procedure.
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