Document Detail

Power spectral analysis of heart rate in relation to sleep position.
MedLine Citation:
PMID:  15084809     Owner:  NLM     Status:  MEDLINE    
We used spectral analysis of heart rate variability, as a measure of autonomic tone, to determine spectral power differences in infants sleeping supine and prone. We studied 29 infants with a birth weight of 1,915 +/- 939 g, at the postconceptional age of 36 +/- 2 weeks. We then calculated total power (TP), low-frequency power (LF, 0.03-0.15 Hz), and high-frequency power (HF, 0.5-1.0 Hz). TP corresponds to overall heart rate variability, LF to both sympathetic and parasympathetic activity, and HF to parasympathetic activity only. Median (25th, 75th percentile) TP (beats/min2) in the supine position was 32.60 (23.12, 59.90), which was significantly higher than the prone position of 25.87 (14.94, 35.57). Similarly, LF (beats/min2) in the supine position of 13.82 (8.63, 23.31) was significantly higher than the prone position of 9.79 (5.46, 14.33). No significant difference was seen in the HF. We conclude that the prone position is associated with decreased heart rate variability and probably decreased sympathetic tone, which imply decreased autonomic stability in this position.
Magali Jean-Louis; Mujahid Anwar; Har'el Rosen; William Craelius; Mark Hiatt; Thomas Hegyi
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Publication Detail:
Type:  Journal Article     Date:  2004-04-08
Journal Detail:
Title:  Biology of the neonate     Volume:  86     ISSN:  0006-3126     ISO Abbreviation:  Biol. Neonate     Publication Date:  2004  
Date Detail:
Created Date:  2004-08-12     Completed Date:  2005-01-25     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  0247551     Medline TA:  Biol Neonate     Country:  Switzerland    
Other Details:
Languages:  eng     Pagination:  81-4     Citation Subset:  IM    
Copyright Information:
Copyright 2004 S. Karger AG, Basel
Division of Neonatology, UMDNJ-Robert Wood Johnson Medical School and St Peter's University Hospital, New Brunswick, NJ 08903, USA.
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MeSH Terms
Birth Weight
Gestational Age
Heart Rate / physiology*
Infant, Newborn
Infant, Premature / physiology*
Prone Position
Spectrum Analysis*
Supine Position

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