Refractory Fetal and Neonatal Supraventricular Tachycardia Associated With Mitral Valve Mass.

Primary cardiac tumors in children are rare and mostly benign but can cause significant cardiovascular complications, including arrhythmias. We present a rare case of fetal and neonatal refractory supraventricular tachycardia linked to a probable mitral valve hemangioma, resulting in severe neonatal and maternal morbidity. Despite challenges, pharmacological therapy ultimately successfully managed the condition, highlighting the importance of individualized treatment in such complex cases.