[Study of hemodynamics and the phase structure of the cardiac cycle of members of the second crew of orbital station "Salyut-6" at rest].

: During the 140-day flight of the Salyut-6 station cardiovascular examinations were carried out at rest. They showed blood redistribution and hyervolemia of the upper body. They also demonstrated increases in the circulating blood volume and pulse blood filling of cerebral vessels, development of the phase preload syndrome and simultaneous decrease in blood filing of leg vessels. These changes varied phasically in the course of flight. Weightlessness of up to 140 days did not cause any pathologies in the cardiovascular system.