[Adaptational disorders of the cardiovascular regulation during brief exposure to hypobaric hypoxia]. / Disadaptatsionnye rasstroistva serdechno-sosudistoi reguliatsii pri kratkosrochnom vozdeistvii gipobaricheskoi gipoksii.

Responses of the cardiovascular system to brief exposure to hypobaric hypoxia were the focus of this investigation. Impairment of adaptive reactions of the body was found to depend on the level of physical loading. "Critical" time of exposure to a simulated altitude of 5000 m came to 7-10 minutes. The deadaptive disorders have a non-specific character, e.g. hypotonia, dysrhythmias, etc. Probability of their emergence hinges on the physical state of subject. Low tolerance of chamber tests was a distinguishing feature of subjects with cardiovascular abnormalities.

[Transcutaneous determination of partial oxygen pressure and local blood flow in human orthostatic exposure]. / Chreskozhnoe opredelenie partsial'nogo davleniia kisloroda i mestnogo krovotoka u cheloveka pri ortostaticheskom vozdeistvii.

Using a Dräger oximeter (the FRG) modified by a Clark polarographic electrode, transdermal measurements of partial pressure of oxygen (PtdO2) and local blood flow (Q) were carried out in 46 test subjects during tilt tests (20 min). As a result of blood redistribution, at minute 1 Q increased significantly in the lower body (p less than 0.01) and decreased in the upper body (p less than 0.01). Regardless of the sensor location, PtdO2 increased in most cases.