[Oxygen supply to the brain in chronic disturbances of cerebral circulation in patients with pathology of brachiocephalic arteries].

We assessed objective parameters of cerebral oxygen supply in 469 patients with multifocal atherosclerosis, hemodynamically significant lesions in brachiocephalic arteries in dependence on degree of severity of vascular cerebral insufficiency according to A.V. Pokrovsky classification of chronic disturbances of cerebral circulation. Comparison of clinical classification with parameters of cerebral oximetry and level of cerebral tolerance to hypoxia allowed to characterize pathophysiological mechanisms of cerebral oxygen metabolism, what was important for determination of risk of surgical treatment and postoperative prognosis.