Diagnosis, Risk Factors, and Management Principles of Fetal Premature Atrial Contractions

Area of Science:

• Cardiology
• Fetal Medicine
• Obstetrics

Background:

• Fetal premature atrial contractions (PACs) are the most common fetal arrhythmia, present in up to 90% of cases.
• While often benign and self-resolving, PACs pose a risk for progression to supraventricular tachycardia (SVT) and heart failure.

Purpose of the Study:

• To review current evidence on the epidemiology, etiology, and risk stratification of fetal PACs.
• To propose a risk-stratified management pathway for fetal PACs.
• To emphasize accurate diagnosis and tailored interventions for optimal perinatal outcomes.

Main Methods:

• Synthesizes current scientific literature on fetal PACs.
• Highlights the diagnostic utility of M-mode and Doppler echocardiography.
• Differentiates PACs from atrioventricular block (AVB) using echocardiographic findings.

Main Results:

• A risk-stratified management approach is proposed, distinguishing low-risk from high-risk cases.
• Low-risk PACs require weekly monitoring and standard obstetric care.
• High-risk PACs necessitate enhanced surveillance, multidisciplinary consultation, and potential antiarrhythmic therapy or early delivery.

Conclusions:

• Accurate diagnosis of fetal PACs is crucial for appropriate management.
• Risk-adapted interventions, including monitoring and potential treatment, optimize perinatal outcomes.
• Postnatal follow-up is essential for managing potential late-onset arrhythmias.