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Fetal arrhythmia associated with sinus node dysfunction--a case report.

S Degani1, E G Abinader, I Shapiro

  • 1Department of Obstetrics and Gynecology, Haifa Medical Center (Rothschild), Faculty of Medicine, Israel.

Journal of Perinatal Medicine
|January 1, 1988
PubMed
Summary
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This study identified fetal sinus node dysfunction in a case of fetal bradycardia without structural heart defects. Postnatal evaluation confirmed the dysfunction, which gradually resolved in the neonatal period.

Area of Science:

  • Cardiology
  • Fetal Medicine
  • Neonatal Care

Background:

  • Fetal bradycardia diagnosis requires precise evaluation.
  • Echocardiography is crucial for assessing fetal cardiac function.
  • Sinus node dysfunction can manifest as bradycardia.

Observation:

  • Real-time and M-mode echocardiography were employed for fetal bradycardia assessment.
  • Fetal electrocardiogram (ECG) and maternal stress tests were utilized.
  • Intravenous (IV) atropine was administered to evaluate sinus node response.

Findings:

  • Sinus bradycardia was diagnosed in the fetus without structural cardiac abnormalities.
  • Fetal ECG and lack of heart rate response to maternal exercise or IV atropine indicated sinus node dysfunction.

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  • Postnatal evaluation confirmed persistent sinus bradycardia with impaired response to IV atropine and abnormal sinus node recovery time.

    • Implications:

    • This case highlights the importance of evaluating sinus node function in fetal bradycardia.
    • Understanding fetal sinus node dysfunction aids in predicting neonatal outcomes.
    • The gradual resolution suggests potential for recovery and decreasing vagal tone influence in neonates.