Biomedicines, Volume 10, Issue 1
2022 January - 197 articles
Cover Story: In space, astronauts are subjected to a prolonged state of microgravity that induces a myriad of physiological adaptations. Human spaceflight is associated with several cardiovascular risk factors that induce multiple structural and functional changes. Upon entering microgravity, cephalad fluid shift occurs and increases the stroke volume and cardiac output. Despite this increase, astronauts enter a state of hypovolemia. The absence of orthostatic pressure and a decrease in arterial pressures reduces the workload of the heart and is believed to be the underlying mechanism for the development of cardiac atrophy in space. In addition, parasympathetic overactivity and blood anemia are observed inflight, while orthostatic intolerance is a remarkable feature postflight. View this paper - Issues are regarded as officially published after their release is announced to the table of contents alert mailing list .
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