Document Detail

Heart rate cyclicity during labor in healthy term fetuses.
MedLine Citation:
PMID:  2730733     Owner:  NLM     Status:  MEDLINE    
Fifty-four intrapartum fetal heart rate (FHR) tracing were subjected to retrospective analysis of the presence, length, and frequency of cyclic changes in long-term variability (cyclicity). All patients had spontaneous uncomplicated labor and received no narcotics or analgesics. The following cycles were identified according the difference in long-term variability in terms of amplitude range: cycle A, 0 to 2.5 beats/min; cycle B, 3 to 5 beats/min; cycle C, 6 to 10 beats/min; and cycle D, 11 to 20 beats/min. The frequency and length of FHR cycles was established in the latent, active phases and second stage of labor. Periods of diminished variability should be followed by fetal acid-base assessment only if their duration exceeds the established norms.
B M Petrikovsky; A M Vintzileos; D J Nochimson
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Publication Detail:
Type:  Journal Article    
Journal Detail:
Title:  American journal of perinatology     Volume:  6     ISSN:  0735-1631     ISO Abbreviation:  Am J Perinatol     Publication Date:  1989 Jul 
Date Detail:
Created Date:  1989-07-27     Completed Date:  1989-07-27     Revised Date:  2004-11-17    
Medline Journal Info:
Nlm Unique ID:  8405212     Medline TA:  Am J Perinatol     Country:  UNITED STATES    
Other Details:
Languages:  eng     Pagination:  289-91     Citation Subset:  IM    
Department of Obstetrics and Gynecology, University of Connecticut Health Center, Farmington 06032.
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MeSH Terms
Fetal Monitoring
Heart Rate, Fetal*
Labor, Obstetric*
Retrospective Studies

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