Document Detail

Fetal heart rate and umbilical artery flow velocity variability in intrauterine growth restriction: a matched controlled study.
MedLine Citation:
PMID:  15133796     Owner:  NLM     Status:  MEDLINE    
OBJECTIVES: To study heart rate and umbilical artery blood flow velocity variability in growth-restricted fetuses and investigate the influence of the autonomic nervous system on these parameters. METHODS: Doppler velocity waveforms were collected from long-lasting umbilical artery recordings in 15 fetuses with growth restriction and 15 normal age-matched controls at 23-35 weeks of gestation. Absolute heart rate and umbilical artery blood flow velocity as well as the coefficient of variation were determined. Using power spectral analysis the low- and high-frequency bands of heart rate variability and blood flow velocity variability were calculated. The low-to-high (LH) ratio of heart rate variability and blood flow velocity variability were examined as a measure of sympathovagal balance. RESULTS: In growth-restricted fetuses umbilical artery velocities were significantly reduced. Heart rate variability was significantly reduced in the presence of growth restriction, but no significant difference was demonstrated for blood flow velocity variability. The LH ratio for heart rate variability was significantly decreased in growth restriction, but no difference in LH ratio was demonstrated for blood flow velocity variability. CONCLUSION: Flow velocity variability in growth restriction seems not to be predominantly influenced by the autonomic nervous system, whereas the decreased heart rate variability seems to be influenced by altered sympathetic-parasympathetic balance.
A S M Vinkesteijn; P C Struijk; N T C Ursem; W C J Hop; J W Wladimiroff
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Publication Detail:
Type:  Journal Article    
Journal Detail:
Title:  Ultrasound in obstetrics & gynecology : the official journal of the International Society of Ultrasound in Obstetrics and Gynecology     Volume:  23     ISSN:  0960-7692     ISO Abbreviation:  Ultrasound Obstet Gynecol     Publication Date:  2004 May 
Date Detail:
Created Date:  2004-05-10     Completed Date:  2004-09-07     Revised Date:  2004-11-17    
Medline Journal Info:
Nlm Unique ID:  9108340     Medline TA:  Ultrasound Obstet Gynecol     Country:  England    
Other Details:
Languages:  eng     Pagination:  461-5     Citation Subset:  IM    
Copyright Information:
Copyright 2004 ISUOG. Published by John Wiley & Sons, Ltd.
Department of Obstetrics and Gynaecology, Erasmus Medical Centre, Rotterdam, The Netherlands.
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MeSH Terms
Blood Flow Velocity
Case-Control Studies
Fetal Growth Retardation / physiopathology,  ultrasonography*
Gestational Age
Heart Rate, Fetal*
Signal Processing, Computer-Assisted
Statistics, Nonparametric
Ultrasonography, Doppler
Ultrasonography, Prenatal
Umbilical Arteries / physiopathology,  ultrasonography*

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