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Related Experiment Videos

Sinusoidal fetal heart rate pattern during labor.

C C Egley1, W A Bowes, D Wagner

  • 1St. Francis Medical Center, Peoria, Illinois.

American Journal of Perinatology
|May 1, 1991
PubMed
Summary
This summary is machine-generated.

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The sinusoidal heart rate (SHR) pattern occurred in 4.2% of fetuses during labor monitoring. Oxytocin administration was linked to prolonged SHR, but it did not impact Apgar scores or fetal well-being.

Area of Science:

  • Perinatology
  • Fetal Monitoring
  • Obstetrics

Background:

  • The sinusoidal heart rate (SHR) pattern is a rare fetal heart rate (FHR) abnormality.
  • Understanding its causes and implications is crucial for intrapartum fetal assessment.

Purpose of the Study:

  • To investigate the incidence and characteristics of the SHR pattern during labor.
  • To identify factors associated with the development of SHR.
  • To evaluate the impact of SHR on fetal outcomes.

Main Methods:

  • Retrospective analysis of 1280 fetuses monitored with internal scalp electrodes during labor.
  • Identification and characterization of fetuses exhibiting the SHR pattern.
  • Comparison of SHR and non-SHR (NSHR) groups regarding clinical data and fetal outcomes.

Related Experiment Videos

Main Results:

  • The SHR pattern was observed in 4.2% of fetuses.
  • Prolonged SHR (>90 minutes) occurred in seven cases, predominantly during oxytocin administration.
  • No significant differences were found in Apgar scores, other FHR abnormalities, or meconium passage between SHR and NSHR groups.
  • Alphaprodine administration was associated with SHR, while other narcotics were not.
  • Fetal scalp pH remained above 7.30 in the few cases tested.

Conclusions:

  • The SHR pattern is uncommon and often transient.
  • Oxytocin and alphaprodine may be associated with SHR development.
  • The SHR pattern, when meeting strict definitions and with normal scalp pH, does not appear to be indicative of fetal distress or adverse outcomes.