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Biomedical subjects

B S Katkovskiĭ

Publications and source records attributed to B S Katkovskiĭ.

14 recordsLinked to original sources
PubMed1978

[External respiration and gas metabolism in orthostatic syncopes].

Cardiorespiratory reactions to tilt tests were compared in 80 healthy male subjects with an adequate orthostatic tolerance and in 19 subjects who fainted during tilting. They showed significant differences in the gas exchange, hemodynamics, and external respiration. Variations in the heart rate, pulmonary ventilation and the alveolar CO2 tension were most demonstrative. The findings, particularly the lack of the expected decrease o= oxygen consumption in the presyncopal state contribute to the concepts of the pathogenesis of the orthostatic collapse.

Adolescent↗
PubMedDate not supplied

[Substantiation of a set of preventive measures applicable to the flight missions of the Saliut orbital station].

The paper describes the effect of exercises, LBNP, controlled water and salt consumption, and drugs used as countermeasures against cardiovascular deconditioning during prolonged (2--7 weeks) head-down bed rest. Each of the above countermeasures applied separately had a limited effect. The use of a combination of exercises, LBNP and water-salt supplements at the final stage of the bed rest experiment made it possible to prevent entirely deterioration of work capacity and decrease of orthostatic tolerance of the test subject. The paper presents the scheme and regimens of the above countermeasures employed to meet the requirements of the flights of the orbital station "Salyut".

Drug Combinations↗
PubMedDate not supplied

[Effect of an increased level of hydration on human tolerance to orthostatism and the action of LBNP].

Intake of fluid, water-salt solutions, water and sodium chloride resulted in hyperhydration, the level and duration of which varied with respect to the pattern and composition of the ingredients consumed. As applied to real space flights, fractional consumption of water and sodium chloride proved most promising. This regimen yielded a distinct and prolonged hyperhydration and incrased orthostatic and LBNP tolerance of the test subjects.

Adult↗
PubMedDate not supplied

[Some physiological effects caused by 30 days of bed rest in different body positions].

Eighteen male test subjects were exposed to a 30-day bed rest with the foot end of the bed tilted at +6 degrees, -2 degrees or -6 degrees. Control subjects were allowed a normal mode of life during the same period of time. Hypokinesia was shown to play the leading role in the genesis of most changes, since control subjects displayed no changes. It was concluded that head-down tilt simulated changes occurring during adaptation to weightlessness better than recumbency or head-up tilt.

Adaptation, Physiological↗