Key result
Exposure to chronic intermittent hypoxia in rats significantly elevated mean arterial pressure, splanchnic sympathetic nerve activity, and rate of phrenic nerve discharge (P<0.05).
Population
Male Sprague-Dawley rats
Comparison
Exposure to chronic intermittent hypoxia for 2… vs Control/baseline (implied)
Design
Preclinical
Follow-up
2 weeks
Authors
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These rat findings are hypothesis-generating for CIH effects; human translation to OSA remains unproven.
p-value: p=<0.05
Exposure to chronic intermittent hypoxia increases sympathetic nerve activity but reduces adrenergic vascular reactivity, which buffers the cardiovascular impact of the exaggerated sympathetic responses.
Silva et al. (2011) studied this question. Chronic intermittent hypoxia was evaluated on mean arterial pressure, splanchnic sympathetic nerve activity, and rate of phrenic nerve discharge (p=<0.05). Exposure to chronic intermittent hypoxia in rats significantly elevated mean arterial pressure, splanchnic sympathetic nerve activity, and rate of phrenic nerve discharge (P<0.05).
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