Document Detail

Slow embryonic heart rate in early first trimester: indicator of poor pregnancy outcome.
MedLine Citation:
PMID:  8029394     Owner:  NLM     Status:  MEDLINE    
PURPOSE: To assess the outcome of early first-trimester pregnancies with slow embryonic heart rates. MATERIALS AND METHODS: Forty pregnant women had prenatal ultrasound scans obtained before 8 weeks gestation that demonstrated an embryonic heart rate of 90 beats per minute or less. Follow-up information was used to determine pregnancy status at the end of the first trimester. RESULTS: Thirty-two embryos died before the end of the first trimester, five survived the first trimester, and three were lost to follow-up. Fetal demise occurred in all seven embryos with heart rates of less than 70 beats per minute, 10 of 11 with heart rates of 70-79 beats per minute, and 15 of 19 with heart rates of 80-90 beats per minute. All 32 pregnancy losses occurred within 10.5 weeks gestation. CONCLUSION: An embryonic heart rate of 90 beats per minute or less early in the first trimester carries a dismal prognosis, with a very high likelihood of fetal demise before the end of the first trimester. Demise occurred in all embryos with heart rates less than 70 beats per minute.
C B Benson; P M Doubilet
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Publication Detail:
Type:  Journal Article    
Journal Detail:
Title:  Radiology     Volume:  192     ISSN:  0033-8419     ISO Abbreviation:  Radiology     Publication Date:  1994 Aug 
Date Detail:
Created Date:  1994-08-11     Completed Date:  1994-08-11     Revised Date:  2004-11-17    
Medline Journal Info:
Nlm Unique ID:  0401260     Medline TA:  Radiology     Country:  UNITED STATES    
Other Details:
Languages:  eng     Pagination:  343-4     Citation Subset:  AIM; IM    
Department of Radiology, Harvard Medical School, Boston, MA.
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MeSH Terms
Fetal Death / diagnosis*
Heart Rate, Fetal*
Pregnancy Trimester, First

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