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Related Experiment Videos

Systolic time intervals after a seven-day orbital flight.

P Groza1, R Vrancianu, M Lazar

  • 1"D. Danielopolu" Institute of Normal and Pathological Physiology, Bucharest, Romania.

Advances in Space Research : the Official Journal of the Committee on Space Research (COSPAR)
|January 1, 1984
PubMed
Summary

This study assessed cosmonaut cardiovascular health before and after spaceflight using exercise tests. Results indicate minimal cardiac changes, with one cosmonaut showing slight deconditioning.

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Area of Science:

  • Cardiovascular Physiology
  • Space Medicine
  • Exercise Physiology

Background:

  • Assessing the cardiovascular effects of spaceflight is crucial for astronaut health.
  • Previous research indicates potential deconditioning after prolonged missions.
  • Understanding physiological responses to exercise in microgravity is essential.

Purpose of the Study:

  • To evaluate cardiovascular responses to exercise in cosmonauts before and after a seven-day spaceflight.
  • To determine if orbital flight induces significant changes in cardiac function.
  • To compare individual physiological adaptations to space travel.

Main Methods:

  • Simultaneous recording of electrocardiograms (ECG) and ear densitograms (DEN) during ergometric bicycle tests.
  • Data collection occurred before, during, and after exercise, both pre- and post-flight.

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  • Utilized analogue and digital processing of recorded physiological signals.

    • Main Results:

    • One cosmonaut (L.P.) exhibited a slight cardiac deconditioning, evidenced by an increased pre-ejection period.
    • The second cosmonaut (D.P.) showed no significant changes in the pre-ejection period, suggesting sympathoadrenergic hypertonia.
    • Overall, the seven-day orbital flight did not result in substantial cardiovascular alterations.

    Conclusions:

    • Short-duration spaceflight appears to have minimal impact on overall cardiovascular function.
    • Individual variability in physiological response to spaceflight exists.
    • Further research is needed to understand long-term cardiovascular adaptations in space.