Orthostatic tachycardia (POTS) can occur after space flights. We determined orthostatic heart rate responses in 18 cosmonauts before and 3–5 days after long-term space missions. Cosmonauts undergoing a cardiovascular training program in space experienced only moderate POTS after their return to earth. Cardiovascular countermeasures may have attenuated POTS. Another possible interpretation is that cardiovascular deconditioning is not sufficient to elicit full blown POTS in the absence of additional genetic or environmental factors.
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This work was supported by grants of the Bundesministerium fuer Bildung und Forschung and the German Aerospace Center (DLR). The German Space Agency (DLR) grants 50WB0317, 50WB0617, and 50WB0917 supported the study. The study was performed at the Institute of Biomedical Problems, Moscow, Russia.
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Tank, J., Baevsky, R.M., Funtova, I.I. et al. Orthostatic heart rate responses after prolonged space flights. Clin Auton Res 21, 121–124 (2011). https://doi.org/10.1007/s10286-010-0106-2
- Orthostatic tachycardia
- Space flight
- Cardiovascular deconditioning