Key result
Both simulated and actual apnea significantly increased sympathetic activity and decreased vagal activity, as evidenced by increased mean-RR, nLF, LF/HF, and α1, and decreased rMSSD and nHF compared to normal respiration.
Why the study?
Frequent respiratory cessations greatly increase arrhythmia prevalence, motivating an evaluation of whether apnea affects autonomic nervous system balance and function using short-term heart rate variability indices.
Does apnea alter autonomic nervous system balance as measured by short-term heart rate variability indices compared to normal respiration?
Observational (n=81)
Does apnea alter autonomic nervous system balance as measured by short-term heart rate variability indices compared to normal respiration?
p-value: p=<0.05
Apnea induces an imbalance in autonomic nervous system function and increases fractal characteristics of the heart, which may predispose individuals to arrhythmias.
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Apnea-linked HRV shifts may flag ANS imbalance warranting arrhythmia vigilance; leaves open causal confirmation in prospective studies.
HE et al. (2020) conducted an observational in Apnea (Healthy volunteers and Sleep disorders) (n=81). Apnea (voluntary and involuntary) vs. Normal respiratory state was evaluated on Short-term heart rate variability indices (mean-RR, rMSSD, nLF, nHF, LF/HF, α1) (p=<0.05). Both simulated and actual apnea significantly increased sympathetic activity and decreased vagal activity, as evidenced by increased mean-RR, nLF, LF/HF, and α1, and decreased rMSSD and nHF compared to normal respiration.
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