Respiratory Heart Rate Variability in Fetal and Neonatal Lambs

  • T. Metsälä
  • J. Grönlund
  • A. Siimes
  • I. Välimäki
Conference paper


Respiratory heart rate variability (respiratory sinus arrhythmia, RSA) is a well-known phenomenon in adults, but its contribution to total heart rate variability (HRV) is small in newborn babies [1]. Fetal HRV is known to increase during fetal breathing movements (FBM) [2, 3], which is thought to be due to RSA. At present there is fairly little frequency-specific information on the relationship between fetal HRV and FBM. In this study we investigated the magnitude of respiratory HRV in chronic fetal and neonatal lamb models using power spectral analysis of heart rate and respirograms.


Heart Rate Variability Respiratory Sinus Arrhythmia Fetal Lamb Tracheal Pressure BMDP Statistical Software 
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Copyright information

© Springer-Verlag Berlin Heidelberg 1991

Authors and Affiliations

  • T. Metsälä
  • J. Grönlund
  • A. Siimes
  • I. Välimäki

There are no affiliations available

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