Detection of the State of Thrombotic Readiness in Rats under One-Time Suprathreshold Physical Activity of Various Durations by Means of Thromboelastography

• Main Authors: Alexander A. Blazhko, Igor I. Shakhmatov, Igor V. Kovalev, Valeriy I. Kiselev, Yuliya A. Bondarchuk, Oksana M. Ulitina, Olga V. Alekseyeva
• Format: Article
• Language: English
• Published: Siberian Federal University 2019-12-01
• Series: Журнал Сибирского федерального университета: Серия Биология
• Subjects: physical activity; thromboelastography; thrombotic state
• Online Access: http://elib.sfu-kras.ru/bitstream/2311/128441/1/08_Blazhko.pdf

Suprathreshold physical activity causing distress in the organism can lead to the damage of various organs and systems including the hemostatic system. A modern integrated method of the hemostatic system assessment is thromboelastography. The purpose of the present study was to evaluate the state of the hemostatic system under one-time suprathreshold physical activity of various durations by means of thromboelastography. Experimental groups of rats were exposed to 4-hour and 8-hour physical activities in the form of forced running on a moving platform with the speed of 6-8 m/min. Immediately after the one-time physical activity, blood samples taken from rats were examined using the thrombelastograph in the Natem mode for 35 minutes. The 4-hour physical activity caused a reduction in coagulation time (CT) and an increase in the alpha angle and the maximum clot firmness (MCF). After the 8-hour activity, the thrombelastograph registered a reduction in coagulation time (CT), an increase in the alpha angle, a decrease in the clot formation time (CFT), a decrease in the maximum clot firmness (MCF), and a reduction in the maximum clot lysis (ML). The 4-hour physical activity resulted in partial activation of the hemostatic system without changing the fibrinolytic activity of blood plasm. The changes revealed in thromboelastography parameters indicate a high risk of the development of thrombotic readiness. The 8-hour physical activity causes a shift of the hemostatic system parameters in rats towards the increased clot formation: hypercoagulation, fibrinogen and platelet consumption, inhibition of fibrinolysis. The combination of changes in thromboelastogram parameters is indicative of the development of thrombotic readiness