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Criteria for fetal Bradycardia in first trimester ultrasound

Criteria for fetal Bradycardia in first trimester ultrasound


Answer

  1. March 18, 2025 aP 1:53 PM

    Hi, 


    Thanks for your question. 

    The ISUOG guidelines are found at 

    https://www.isuog.org/clinical-resources/patient-information-series/patient-information-pregnancy-conditions/heart/fetal-heart-bradycardia.html#:~:text=Fetal%20bradycardia%20means%20an%20abnormally,it%20happens%20in%20fetal%20life.


    These state fetal bradycardia is 120-160bpm. However, literature states that fetal bradycardia in the first trimester is under 100bpm at around 6weeks gestation 


    Thanks 


    ASA WH Committee

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