Fractal Analysis and Hurst Parameter for Intrapartum Fetal Heart Rate Variability Analysis: A Versatile Alternative to Frequency Bands and LF/HF Ratio

PloS One
M DoretP Abry

Abstract

The fetal heart rate (FHR) is commonly monitored during labor to detect early fetal acidosis. FHR variability is traditionally investigated using Fourier transform, often with adult predefined frequency band powers and the corresponding LF/HF ratio. However, fetal conditions differ from adults and modify spectrum repartition along frequencies. This study questions the arbitrariness definition and relevance of the frequency band splitting procedure, and thus of the calculation of the underlying LF/HF ratio, as efficient tools for characterizing intrapartum FHR variability. The last 30 minutes before delivery of the intrapartum FHR were analyzed. Case-control study. A total of 45 singletons divided into two groups based on umbilical cord arterial pH: the Index group with pH ≤ 7.05 (n = 15) and Control group with pH > 7.05 (n = 30). Frequency band-based LF/HF ratio and Hurst parameter. This study shows that the intrapartum FHR is characterized by fractal temporal dynamics and promotes the Hurst parameter as a potential marker of fetal acidosis. This parameter preserves the intuition of a power frequency balance, while avoiding the frequency band splitting procedure and thus the arbitrary choice of a frequency separating bands. The...Continue Reading

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Citations

Nov 5, 2016·Nature Reviews. Cardiology·Gabriella CapturJames C Moon
Apr 6, 2016·IEEE Journal of Biomedical and Health Informatics·Jiri SpilkaMuriel Doret
Nov 6, 2018·Journal of Biomedical Optics·Naser Hakimi, Seyed Kamaledin Setarehdan
Jan 1, 2020·BMC Medical Informatics and Decision Making·Zhidong ZhaoLihuan Shao
Jul 17, 2020·Frontiers in Physiology·Mario LavangaAlexander Caicedo
Mar 9, 2021·Brain Injury : [BI]·Inmaculada RiquelmePedro Montoya
Nov 8, 2019·Computers in Biology and Medicine·A Houzé de l'AulnoitR Beuscart

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Methods Mentioned

BETA
cesarean sections

Software Mentioned

MATLAB
SPSS

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