Internal carotid occlusion: a prospective study.
Forty-seven patients with ICA occlusion and who presented either without any or only a mild neurological deficit were prospectively followed for an average of 34.4 months. During this period of time, 11 patients (23.5%) suffered a cerebral infarction of which two-thirds were ipsilateral to the occluded artery. The stroke rate distal to an occluded ICA artery was 5% per year. Twenty-four patients (51%) continued to experience TIA's in the territory of the occluded artery. The mortality rate was low (8.5%) during follow-up. Whether extracranial-intracranial bypass surgery will decrease the risk of cerebral infarction in this subgroup of patients is unknown. The International EC/IC Collaborative Trial may elucidate this point because this subgroup represents one of the randomization strata of that study.
D000328:Adult; D000368:Aged; D002340:Carotid Artery Diseases / Q000150:complications* / Q000000981:diagnostic imaging / Q000401:mortality; D002343:Carotid Artery, Internal; D002544:Cerebral Infarction / Q000209:etiology; D005260:Female; D005500:Follow-Up Studies; D006801:Humans; D002546:Ischemic Attack, Transient / Q000209:etiology; D008297:Male; D008875:Middle Aged; D009460:Neurologic Examination; D011379:Prognosis; D011446:Prospective Studies; D011859:Radiography