Nonlinear analysis of heart rate variability within independent frequency components during the sleep-wake cycle

Autonomic Neuroscience : Basic & Clinical
Daniel E VigoDaniel P Cardinali

Abstract

Heart rate variability (HRV) is a complex signal that results from the contribution of different sources of oscillation related to the autonomic nervous system activity. Although linear analysis of HRV has been applied to sleep studies, the nonlinear dynamics of HRV underlying frequency components during sleep is less known. We conducted a study to evaluate nonlinear HRV within independent frequency components in wake status, slow-wave sleep (SWS, stages III or IV of non-rapid eye movement sleep), and rapid-eye-movement sleep (REM). The sample included 10 healthy adults. Polysomnography was performed to detect sleep stages. HRV was studied globally during each phase and then very low frequency (VLF), low frequency (LF) and high frequency (HF) components were separated by means of the wavelet transform algorithm. HRV nonlinear dynamics was estimated with sample entropy (SampEn). A higher SampEn was found when analyzing global variability (Wake: 1.53+/-0.28, SWS: 1.76+/-0.32, REM: 1.45+/-0.19, p=0.005) and VLF variability (Wake: 0.13+/-0.03, SWS: 0.19+/-0.03, REM: 0.14+/-0.03, p<0.001) at SWS. REM was similar to wake status regarding nonlinear HRV. We propose nonlinear HRV is a useful index of the autonomic activity that characte...Continue Reading

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Citations

Nov 29, 2011·Autonomic Neuroscience : Basic & Clinical·Juan I SolernóDaniel E Vigo
Feb 19, 2015·Medical & Biological Engineering & Computing·M AktaruzzamanR Sassi
Jan 8, 2015·Frontiers in Neuroscience·Florian Chouchou, Martin Desseilles
May 24, 2019·Journal of Clinical Medicine·Jacopo Antonino VitaleGiuseppe Banfi
Feb 7, 2020·Clinical Autonomic Research : Official Journal of the Clinical Autonomic Research Society·Cinthia Terroba-ChambiMarcelo Merello
Nov 30, 2018·Journal of Clinical Neurophysiology : Official Publication of the American Electroencephalographic Society·Sabina AslanF Irsel Tezer
Mar 24, 2015·Physiological Measurement·L FaesG Nollo
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Oct 3, 2017·Entropy·Maristella LucchiniMaria G Signorini
Sep 10, 2020·Frontiers in Physiology·Eric E Solís-MontufarAlejandro Muñoz-Diosdado
Mar 25, 2021·Physiological Measurement·Xueyu LiangChengyu Liu
Jul 30, 2021·Sleep & Breathing = Schlaf & Atmung·Farideh Ebrahimi, Iman Alizadeh

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