Cardio-oncology & other

Clinical Role of the Noninvasive Abdominal Fetal ECG in the Detection and Monitoring of Fetal Tachycardia

Circ Arrhythm ElectrophysiolPublished Prospective recruitment

Authors' conclusion

We have shown that rhythm strips of fECG signals can be extracted and correctly identify the electrical mechanism of arrhythmia in cases of fetal tachycardia. The potential to monitor fetal heart rate over a prolonged period is an advantage over current monitoring strategies for documentation of intermittent arrhythmias and gauging the response to medical therapy. These data will enable research to focus on improvement in signal quality, assessment of other arrhythmia subtypes, and real-time ambulatory monitoring of the fetal rhythm.

Study context

Population
Pregnant participants with known or suspected fetal tachycardiaparticipants undertook 1 to 4 fetal ECG (fECG) recordings, giving a total of 23 recordings
Participants
15 participants
Exposure
Comparison of fECG data with clinical data obtained using echocardiography and postnatal findings
Outcome
Gestational age
Methodological detailstertiary fetal cardiology unit, overnight fECG recording at home using the MonicaAN24 monitor
  • Tertiary fetal cardiology unit
  • Overnight fECG recording at home using the MonicaAN24 monitor

Main finding

As reported in the abstract

Gestational age, median (interquartile range; range)

28.9 (23.9-34.3; 21-39.1) weeks

Observational data: associations, not effects.

Further findings

Duration of recording

Duration of recording, median (interquartile range; range)
512 (380-609; 5-1259) minutes

Fetal heart rate graphs

Intermittent tachycardia was demonstrated on fetal heart rate graphs

Rhythm strips vs echocardiography

Rhythm strips correctly identified short-ventriculoatrial and long-ventriculoatrial tachycardia, atrial flutter, and sinus rhythm with findings correlating with echocardiography

Postnatal ECG correlation

Postnatal ECG correlation was possible in
3

Original publication

Clinical Role of the Noninvasive Abdominal Fetal ECG in the Detection and Monitoring of Fetal Tachycardia. Circ Arrhythm Electrophysiol. Published 11 September 2025. doi:10.1161/circep.124.013556

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