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Area of Science:

  • Cardiovascular physiology
  • Space medicine
  • Aerospace medicine

Background:

  • Space flight significantly affects cardiovascular system functions.
  • Changes include altered cerebral blood flow, venous return, and potential anemia.
  • Increased sympathetic nervous system activity is also observed.

Purpose of the Study:

  • To review the cardiovascular effects of spaceflight.
  • To discuss potential prevention measures for astronauts.
  • To highlight the long-term risks of cardiovascular diseases due to space exposure.

Main Methods:

  • This is a review article.
  • It synthesizes existing research on spaceflight and cardiovascular changes.
  • Data from past space missions (Gemini, Apollo) are considered.

Main Results:

  • Spaceflight can cause arrhythmias like premature complexes.
  • Microgravity leads to myocyte degeneration and muscle atrophy.
  • Altered gene expression, calcium handling, and impaired contractility are noted.

Conclusions:

  • Understanding cardiac changes is vital for astronaut adaptation.
  • Space radiation poses risks for radio-degenerative cardiac effects.
  • Preventive strategies are necessary for long-term cardiovascular health in space.