[Contractile function of the left ventricle of the heart in increased pressure of the gas medium].

The hyperbaric effect on the contractile function of the left ventricle of the heart was examined in 16 test subjects by means of polycardiography. In a compressed air atmosphere (P = 0.5 MPa for 30 min), systolic time intervals varied. In a hyperbaric normoxic (N2 - O2) atmosphere, the changes were less expressed. In a medical oxygen atmosphere at a normal barometric pressure, the adverse effect on the left ventricle contractile function was least pronounced. It is concluded that hyperbaria, increased gas density, and hyperoxia produce a pathogenic effect on the heart; during short-term exposure increased gas density has the strongest effect.