Key result
Decreased central volume from progressive lower body negative pressure was inversely correlated with heart rate variability (r=0.92) and baroreflex sequences.
Why the study?
Do heart rate variability and baroreflex sequences reliably track autonomic function changes during induced central hypovolemia, and are they reliable without strict control of breathing?
Observational (n=30)
Do heart rate variability and baroreflex sequences reliably track autonomic function changes during induced central hypovolemia, and are they reliable without strict control of breathing?
Effect estimate: r = 0.92
Heart rate variability and baroreflex sequences reliably track central volume loss during simulated hemorrhage independent of breathing mode, potentially offering an early warning system for progression to shock.
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HRV and baroreflex measures may aid early recognition of shock risk; leaves open prospective validation in clinical hemorrhage.
Cooke et al. (2005) conducted an observational in Induced central hypovolemia (n=30). Progressive lower body negative pressure was evaluated on Changes in heart rate variability and baroreflex sequences (r = 0.92). Decreased central volume from progressive lower body negative pressure was inversely correlated with heart rate variability (r=0.92) and baroreflex sequences.
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