Hypoxia

CV response to acute hypoxia may depend on intensity of exposure

Published in Health and Medicine Week, April 4th, 2005

Arterial pressure and muscle sympathetic nerve activity are increased after 2 hours of sustained but not cyclic hypoxia in healthy humans.

According to scientists writing in the Journal of Applied Physiology, "Sustained and episodic hypoxic exposures lead, by two different mechanisms, to an increase in ventilation after the exposure is terminated. Our aim was to investigate whether the pattern of hypoxia, cyclic or sustained, influences sympathetic activity and hemodynamics in the postexposure period."

R. Tamisier and colleagues of Beth Israel Deaconess Medical Center in Boston explained, "We measured sympathetic activity (peroneal...

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Source: Health and Medicine Week (2005-04-04)

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