[Long-term results of surgical treatment of patients with asymptomatic carotid artery stenosis].

Results of treatment of 148 patients with asymptomatic carotid stenosis were analyzed in terms from 5 to 180 months. 75 (51%) patients were operated, 73 (49%)--were not operated. Non-operated asymptomatic patients with more than 90% stenosis and patients with prolonged (more than 18 mm) stenosis have the highest risk of cerebral events (4% annually and more). In long-term period (from the 70th month of follow-up) patients with the 70-90% stenosis are the group of high risk of cerebro-vascular symptoms.