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A comparison of fetal and neonatal heart rate variability at similar post-menstrual ages

Nikhil S Padhye1, M Verklan, Audrius Brazdeikis

  • 1The University of Texas Health Science Center at Houston, TX 77030, USA. Nikhil.S.Padhye@uth.tmc.edu

Annual International Conference of the IEEE Engineering in Medicine and Biology Society. IEEE Engineering in Medicine and Biology Society. Annual International Conference
|January 24, 2009
PubMed

Insights

Fetal heart rate variability (HRV) is higher than in premature neonates, indicating poorer autonomic balance after birth. This difference persists even when controlling for post-menstrual age, suggesting developmental impacts of prematurity.

Area of Science:

  • Cardiology
  • Neonatal Physiology
  • Autonomic Nervous System Development

Background:

  • Heart rate variability (HRV) reflects autonomic nervous system (ANS) function.
  • Premature birth may impact ANS maturation and autonomic balance.
  • Understanding fetal vs. neonatal ANS development is crucial for neonatal care.

Purpose of the Study:

  • To compare heart rate variability (HRV) between fetuses and prematurely born neonates of similar post-menstrual ages.
  • To investigate the maturation of the autonomic nervous system (ANS) in fetuses and premature neonates.
  • To assess autonomic balance in fetuses versus neonates born prematurely.

Main Methods:

  • Analysis of heart rate variability (HRV) power spectrum, focusing on high-frequency (HF) and low-frequency (LF) bands.
  • Calculation of multiscale entropy (MSE) to assess complexity.
  • Comparison between fetal and premature neonatal groups matched for post-menstrual age.

Main Results:

  • Fetuses exhibited significantly higher HRV in the high-frequency (HF) band compared to premature neonates.
  • Growth in both LF and HF HRV bands was observed, indicating ANS maturation.
  • Higher multiscale entropy (MSE) was found in fetuses, suggesting greater physiological complexity.
  • The elevated fetal HF-HRV persisted after accounting for age-related changes.

Conclusions:

  • Prematurely born neonates demonstrate poorer autonomic balance compared to fetuses of identical post-menstrual age.
  • The findings suggest that prematurity may disrupt the normal maturation trajectory of the autonomic nervous system.
  • HRV analysis provides valuable insights into the physiological consequences of premature birth on autonomic regulation.

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