Fetal bradyarrhythmia

Fetal bradyarrhythmia refers to an abnormally low fetal heart rate (less than 100-110 beats per minute 3,7) as well as being irregular, i.e. irregular fetal bradycardia.


A fetal bradyarrhythmia can fall into several types which include

  • congenital cardiac anomalies: may be present in 50-60% of cases 2,3
  • maternal connective tissue disease 
    • anti-Ro and anti-La positive antibody pregnancies: 20-30% of cases ref

Treatment and prognosis


The development of hydrops fetalis is a serious complication.

Ultrasound - obstetric
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Article information

rID: 13881
Tag: cases
Synonyms or Alternate Spellings:
  • Fetal bradyarrhythmias
  • Foetal bradyarrhythmia
  • Foetal bradyarrhythmias

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