Hypovolemia and neurovascular control during orthostatic stress.

  title={Hypovolemia and neurovascular control during orthostatic stress.},
  author={D S Kimmerly and J. Kevin Shoemaker},
  journal={American journal of physiology. Heart and circulatory physiology},
  volume={282 2},
Humans exposed to real or simulated microgravity experience decrements in blood pressure regulation during orthostatic stress that may be related to autonomic dysregulation and/or hypovolemia. We examined the hypothesis that hypovolemia, without the deconditioning effects of bed rest or spaceflight, would augment the sympathoneural and vasomotor response to graded orthostatic stress. Radial artery blood pressure (tonometry), stroke volume (SV), brachial blood flow (Doppler ultrasound), heart… CONTINUE READING