STATE OF THE RHEOLOGICAL PROPERTIES OF BLOOD IN THE DYNAMICS OF DEVELOPMENT OF ACUTE DISTURBANCES OF CEREBRAL CIRCULATION IN ATHEROSCLEROSIS PATIENTSV. G. Ionova UDC 616.831-005.4-06:616.151.4 The data on the state of the rheological properties of blood and the thrombocytic-vascular chain of hemostasis in the dynamics of development of transitional ischemic attacks and acute ischemic insult are presented and compared to the indices of healthy persons and patients with chronic cerebrovascular pathology. Throughout the period of observation, in the patients of all the groups examined we established changes in the increase in the blood viscosity, the aggregation of erythrocytes, and the content of fibrinogen (with decrease in the deformability of erythrocytes) and an increase in the activation of the function of thrombocytes against the background of the changed athrombogenic properties of the vascular system. It has been revealed that there is a close connection between the hemorheological disturbances and the heaviness of atherosclerotic affection of the main arteries of the heart. Scientific-Research Institute of Neurology, Russian Academy of Medical Sciences, Moscow, Russia. Translated from Inzhenerno-Fizicheskii Zhurnal, Vol. 76, No. 3, pp. 169-175, May-June, 2003. Original article submitted December 17, 2002.