Key result
Microgravity exposure in astronauts is associated with physiological changes such as loss of ventricular mass and increased corrected QT intervals, indicating an increased risk of arrhythmias.
Why the study?
With increasing duration and frequency of manned space missions, understanding the impact of microgravity on the cardiovascular health of astronauts is crucial.
Does microgravity affect hemodynamic parameters and cardiovascular biomarkers in astronauts?
Does microgravity affect hemodynamic parameters and cardiovascular biomarkers in astronauts?
Microgravity exposure leads to significant cardiovascular physiological changes, such as ventricular mass loss and QT prolongation, which may pose health threats to astronauts during space missions.
Documented microgravity effects signal arrhythmia and deconditioning risks in astronauts; leaves open direct links to clinical cardiovascular disease and long-term outcomes.
Background: Space exploration has become a major interest for scientific and medical research. With increasing duration and frequency of manned space missions, it is crucial to understand the impact of microgravity on the cardiovascular health of astronauts. We focus on this relationship by reviewing literature that explores how microgravity affects several hemodynamic parameters and cardiovascular biomarkers. Methods: We conducted a search updated to November 2024 across several databases, including PubMed, Cochrane Library, ESA, NASA and DLR, using relevant MeSH terms and selection criteria. Results: The 22 selected articles detail how microgravity impacts the cardiovascular system and its adaptations. We identify some clear patterns, such as loss of ventricular mass and increased QT intervals (corrected for heart rate) indicating increased risk of arrhythmias. Our analysis confirms that head-down tilt is an accurate analog of microgravity. Conclusions: While a direct link between microgravity and cardiovascular disease, such as coronary heart disease and myocardial infarction, remains elusive, the documented physiological changes pose a potential threat to the astronauts' health. We suggest that future research focus on long-term effects, particularly on female subjects.
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Azariah et al. (2025) conducted a review in Cardiovascular health in astronauts. Microgravity was evaluated on Hemodynamic parameters and cardiovascular biomarkers. Microgravity exposure in astronauts is associated with physiological changes such as loss of ventricular mass and increased corrected QT intervals, indicating an increased risk of arrhythmias.
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