Reaction of human hemodynamic on different values of hypoxia intervention

The hemodynamic reactions in response to short-term (20 min) of norm baric hypoxia (NH) – 14,5 % и 12,3 % О 2 have been studied in two groups of humans (18–26 years). It was found that NH 12,3 % О 2 induce the decrease of blood oxygenation, and the increase the positive chronotropic effect of heart function and his efficiency as well as the decrease of total peripheral resistance of vessels and activation of para- and sympatic regulation. At the same time the changing of systolic arterial pressure depends on individual properties. In these conditions the change of hemodynamic parameters are described by parabolic interaction whereas during NH 14,5 % О 2 this process is more linear. It is suggested that the system of blood circulation is able to provide the anticipatory reactions depending on NH of large power which are appeared significantly earlier than arising of critical condition of oxigen balance and the symptoms of functional distribution of the blood circulation system.