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Heart Rate Variability During a Standard Dive: A Role for Inspired Oxygen Pressure?

dc.rights.licenseCC0en_US
dc.contributor.authorLafère, Pierre
dc.contributor.authorLAMBRECHTS, Kate
dc.contributor.authorGERMONPRÉ, Peter
dc.contributor.authorBalestra, Ambre
dc.contributor.authorGermonpré, Faye-Lisa
dc.contributor.authorMarroni, Alessandro
dc.contributor.authorCialoni, Danilo
dc.contributor.authorBosco, Gerardo
dc.contributor.authorBALESTRA, Costantino
dc.date.accessioned2023-10-09T14:28:44Z
dc.date.available2023-10-09T14:28:44Z
dc.date.issued2021-08-13
dc.identifier.issn1664-042Xen_US
dc.identifier.urihttps://luck.synhera.be/handle/123456789/2052
dc.identifier.doi10.3389/fphys.2021.635132en_US
dc.description.abstractIntroduction: Heart rate variability (HRV) during underwater diving has been infrequently investigated because of environment limitations and technical challenges. This study aims to analyze HRV changes while diving at variable hyperoxia when using open circuit (OC) air diving apparatus or at constant hyperoxia using a closed-circuit rebreather (CCR). We used HRV analysis in time and frequency domain adding nonlinear analysis which is more adapted to short-time analysis and less dependent on respiratory rate (Sinus respiratory arrhythmia). Materials and Methods: 18 males, 12 using OC (30 mfw for 20 min) and 6 using CCR (30 mfw for 40 min.). HRV was recorded using a polar recorder. Four samples of R-R intervals representing the dive were saved for HRV analysis. Standard deviation of normal-to-normal intervals (SDNN), square root of the mean squared differences between successive RR intervals (rMSSD), and average RR intervals (RR) in time-domain; low frequency (LF) and high frequency (HF) in frequency domain were investigated. Nonlinear analysis included fractal dimension (FrD). Results: SDNN and rMSSD were significantly increased during descent and at depth with OC, not with CCR. Mean RR interval was longer at depth with OC, but only during ascent and after the dive with CCR. HF power was higher than baseline during the descent both with OC and CCR and remained elevated at depth for OC. The LF/HF ratio was significantly lower than baseline for descent and at depth with both OC and CCR. After 30 min of recovery, the LF/HF ratio was higher than baseline with both OC and CCR. Nonlinear analysis detected differences at depth for OC and CCR. Discussion: Increased parasympathetic tone was present during diving. RR duration, SDNN; rMSSD, HF spectral power all increased during the dive above pre-dive levels. Conversely, HF power decreased (and the LF/HF increased) 30 min after the dive. Using FrD, a difference was detected between OC and CCR, which may be related to differences in partial pressure of oxygen breathed during the dive.en_US
dc.description.sponsorshipNoneen_US
dc.language.isoENen_US
dc.publisherFrontiersen_US
dc.relation.ispartofFrontiers in Physiologyen_US
dc.rights.urihttps://creativecommons.org/licenses/en_US
dc.subjectAutonomic Nervous Systemen_US
dc.subjectFractalen_US
dc.subjectEnvironmental stressen_US
dc.subjectHeart Rate Variabilityen_US
dc.titleHeart Rate Variability During a Standard Dive: A Role for Inspired Oxygen Pressure?en_US
dc.typeArticle scientifiqueen_US
synhera.classificationSciences du vivanten_US
synhera.classificationSciences de la santé humaineen_US
synhera.institutionHE Bruxelles Brabanten_US
synhera.otherinstitutionUniversité Libre de Bruxellesen_US
synhera.otherinstitutionDAN Europe researchen_US
synhera.cost.total2950en_US
synhera.cost.apc2950en_US
synhera.cost.comp0en_US
synhera.cost.acccomp2950en_US
dc.description.versionOuien_US
dc.rights.holderLes Auteursen_US


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