What should be done for fetal arrhythmia at 30 weeks of gestation (late pregnancy)?

As pregnancy progresses into the third trimester, some expectant mothers may be informed by their obstetrician during prenatal visits that their fetus is experiencing intrauterine growth restriction (IUGR). Pregnant women must pay close attention to this condition; if left unmanaged, it may lead to serious complications. What should be done if fetal arrhythmia is detected at 30 weeks’ gestation?

Management of Fetal Arrhythmia at 30 Weeks’ Gestation

When fetal arrhythmia is identified in the late third trimester (e.g., at 30 weeks’ gestation), the first step is to assess its severity and identify the underlying cause, followed by appropriate, individualized treatment. Upon detection of arrhythmia in late pregnancy, clinicians should initially evaluate its clinical significance and then perform an electrocardiogram (ECG) or 24-hour Holter monitoring to determine the specific type of arrhythmia. If indicated, fetal echocardiography with color Doppler ultrasound should be conducted to rule out structural congenital heart disease and guide targeted therapy—primarily pharmacologic intervention. In cases of benign sinus arrhythmia or isolated premature beats without maternal symptoms, no specific treatment is required. Instead, emphasis should be placed on adequate rest, avoidance of strenuous physical activity, and reduction of psychological stress.

For hemodynamically significant tachyarrhythmias refractory to medical therapy, electrophysiological study combined with radiofrequency ablation may be considered. In cases of severe bradyarrhythmia, permanent pacemaker implantation may be necessary. When advanced atrioventricular (AV) block leads to frequent premature beats or atrial fibrillation, color Doppler echocardiography is essential to assess for associated cardiac pathology and inform targeted management.

Patients are advised to adopt lifestyle modifications, including minimizing mental stress and anxiety, ensuring sufficient rest, avoiding late-night activities, and maintaining both adequate sleep duration and quality. We hope this information proves helpful.