title: [Tolerance of +Gz accelerations in chronic compensated cardiac muscle disease].
abstract: The functional potentialities of the cardiovascular system were investigated during an exposure of people with compensated chronic diseases of the cardiac muscle to acceleration (+Gz). The test subjects were exposed to acceleration of 3 and 5 g for 30 sec with an interval of 5 min. The parameters of hemodynamics, ECG and visual perception were recorded. The systolic blood volume, cardiac output and specific peripheral resistance were derived from the Bremser-Ranke formula. Seventy one subjects with heart diseases and 23 healthy subjects were examined. The subjects with myocardiodystrophy and myocarditic cardiosclerosis (12+/-16) showed a reduced tolerance to accelerations. During an exposure the subjects with atherosclerotic cardiosclerosis showed a higher pressure in vessels of ear conch than the healthy subjects. The myocardiodystrophic subjects frequently (20%) exhibited an inversion of electrocardiographic T2. The subjects with heart diseases (27-33%) showed extrasystolic disturbances. The results may be used in medical expertise of pilots.
mesh_terms: D000054:Acceleration; D000222:Adaptation, Physiological; D000328:Adult; D001794:Blood Pressure; D006331:Heart Diseases / Q000503:physiopathology*; D006801:Humans; D008875:Middle Aged; D011674:Pulse
vernacular_title: Perenosimost' uskoreniĭ (+Gz) litsami s khronicheskimi kompensirovannymi zabolevaniiami myshtsy serdtsa