Prenatal diagnosis and management of fetal supraventricular tachyarrhythmia and postnatal outcomes

We found that in the absence of hydrops, all tachycardiac fetuses responded to treatment regardless of the treatment option. In cases with hydrops, mortality was not observed when anti-arrhythmic treatment was started before significant cardiac dysfunction and heart failure. The need for postnatal treatment was common among those with recurrent tachyarrhythmia under treatment, recurrent arrhythmia after discontinuation of fetal therapy, arrhythmia followed up without treatment in the late gestational period and arrhythmias such as Junctional ectopic tachycardia (JET) and Wolff-Parkinson-White syndrome (WPW) syndrome.