Human vagal baroreflex mechanisms in space.

  title={Human vagal baroreflex mechanisms in space.},
  author={Dwain L Eckberg and John R Halliwill and Larry A Beightol and Troy Brown and J. Andrew Taylor and Ross Goble},
  journal={The Journal of physiology},
  volume={588 Pt 7},
Although astronauts' cardiovascular function is normal while they are in space, many have altered haemodynamic responses to standing after they return to Earth, including inordinate tachycardia, orthostatic hypotension, and uncommonly, syncope. Simulated microgravity impairs vagal baroreceptor-cardiac reflex function and causes orthostatic hypotension. Actual microgravity, however, has been shown to either increase, or not change vagal baroreflex gain. In this study, we tested the null… CONTINUE READING
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