Abstract

Although fetal cardiac arrhythmia and repolarization abnormalities can be associated with sudden death before and after delivery, cardiac electrical activity is not easily assessed in the fetus due to the limitations of the fetal electrocardiogram (ECG). Fetal magnetocardiography (fMCG) has shown high efficacy for the diagnosis of fetal arrhythmia,1 including the detection of abnormalities such as QTc prolongation and T-wave alternans (TWA) in fetuses with long QT syndrome (LQTS). Echocardiographic assessment of fetal arrhythmia risk has been explored.