Mobile Evaluation of Heart Rate Variability using the Diver's Reflex
Mobile Evaluation of HRV
HRV is considered a marker of ANS function. It has become a marker of interest in evaluating nervous system function following traumatic brain injury. This study validates prior research using larger sample sizes proposes a model for establishing baseline HRV reactivity in healthy participants.
62 healthy college athletes were recruited for this study. Following an informed consent process they were evaluated supine using the Elite HRV Cor-sense monitor and platform to record LF/HF ratio and RMSSD over 5 minutes. A bag of ice was placed on their face, then RMSSD and LF/HF ratio were collected over 3 successive 1-minute intervals.
RMSSD was elevated at 1 and 2 minutes (+47.4 ms, P <.0001; +16.5 ms P = .014) following face cooling and fell to baseline at 3 minutes (+4.6 ms, P = 0.52). LF/HF ratio decreased following face cooling at 2 and 3 minutes (change from rest %: 2 minutes: -33%, P=.007; 3 minutes -50%, P=<.0001).
The Elite HRV platform can detect an elevation in RMSSD in the first minute following face cooling with a successive return to baseline in the second and third minutes. It can also detect a consistent decrease in LF/HF following face cooling.
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Copyright (c) 2021 Harrison Seltzer, Melissa Pellman, M.S., Raechel Warchock, B.S., Joseph Billian, M.S., Robert Baker, M.D. PhD
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