Fetal and Neonatal Arrhythmias

Area of Science:

• Fetal and Neonatal Medicine
• Pediatric Cardiology

Background:

• Cardiac arrhythmias are significant in fetal and neonatal care.
• Premature atrial or ventricular complexes are primary causes of irregular fetal heart rhythms.
• These findings often lack identifiable causes and typically do not require intervention.

Purpose of the Study:

• To review the common types of fetal and neonatal cardiac arrhythmias.
• To discuss the management strategies for tachyarrhythmias and bradycardias.
• To highlight the importance of understanding arrhythmia mechanisms for appropriate care.

Main Methods:

• Literature review of fetal and neonatal cardiac arrhythmias.
• Analysis of common arrhythmia mechanisms including premature complexes, tachyarrhythmias, and bradycardias.
• Overview of available antiarrhythmic agents and management approaches.

Main Results:

• Premature complexes are the most frequent cause of irregular fetal heart rhythm, usually benign.
• Tachyarrhythmias commonly include supraventricular reentrant tachycardia, atrial flutter, and sinus tachycardia.
• Bradycardia causes include sinus node dysfunction, complete heart block, and nonconducted atrial bigeminy.

Conclusions:

• Most premature complexes in fetuses and neonates do not require treatment.
• Perinatal treatment options exist for tachyarrhythmias.
• Effective management of bradycardia is contingent upon identifying the underlying etiological mechanism.