Document Detail

Increase in regularity of fetal heart rate variability with age.
MedLine Citation:
PMID:  17061949     Owner:  NLM     Status:  MEDLINE    
It is generally assumed that fetal heart rate variability increases with gestation, reflecting prenatal development of the autonomic nervous system. We examined standard measures quantifying fetal heart rate variability, as well as a complexity measure, approximate entropy, in 66 fetal magnetocardiograms recorded from 22 healthy pregnant women between the 16th and 42nd week of gestation. In particular, regularity in the fetal RR interval time series was assessed on the basis of symbolic dynamics. The results showed that, beside an overall increase in fetal heart rate variability and complexity during pregnancy, there was also an increase in specific sets of binary patterns with low approximate entropy, i.e., a high degree of regularity. These sets were characterized by short epochs of heart rate acceleration and deceleration, and comparison with surrogate data confirmed that their random occurrence is rare. The results most likely reflect the influence of increasingly differentiated fetal behavioral states and transitions between them in association with fetal development.
Peter Van Leeuwen; Dirk Cysarz; Silke Lange; Dietrich Grönemeyer
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Publication Detail:
Type:  Journal Article    
Journal Detail:
Title:  Biomedizinische Technik. Biomedical engineering     Volume:  51     ISSN:  0013-5585     ISO Abbreviation:  Biomed Tech (Berl)     Publication Date:  2006 Oct 
Date Detail:
Created Date:  2006-10-25     Completed Date:  2006-12-26     Revised Date:  2010-11-05    
Medline Journal Info:
Nlm Unique ID:  1262533     Medline TA:  Biomed Tech (Berl)     Country:  Germany    
Other Details:
Languages:  eng     Pagination:  244-7     Citation Subset:  IM    
Department of Biomagnetism, Grönemeyer Institute for Microtherapy, University Witten/Herdecke, Bochum, Germany.
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MeSH Terms
Aging / physiology*
Biological Clocks / physiology*
Computer Simulation
Gestational Age
Heart Rate, Fetal / physiology*
Models, Cardiovascular*

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