Extracranial-intracranial bypasses.
D002545:Brain Ischemia / Q000601:surgery*; D002340:Carotid Artery Diseases / Q000601:surgery*; D002548:Cerebral Revascularization; D005500:Follow-Up Studies; D006801:Humans; D002537:Intracranial Arteriosclerosis / Q000601:surgery*; D011183:Postoperative Complications / Q000209:etiology; D012306:Risk; D013997:Time Factors