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Introduction: Prenatally diagnosed Ebstein’s anomaly with tricuspid valve dysplasia (EA/TVD) is a rare and high-risk congenital heart malformation with limited effective treatments. We report a case of severe fetal EA with hydrops treated with modest doses of non-steroidal anti-inflammatory drug (NSAID) therapy, resulting in reversal of hydrops and a favorable fetal outcome. Case Presentation: Fetal heart defects included an inferiorly displaced tricuspid valve, severe tricuspid regurgitation, significantly dilated right atrium, and hypoplastic pulmonary valve with moderate regurgitation resulting in a circular shunt across the ductus arteriosus. Maternal indomethacin therapy was initiated at 31+5 weeks gestation due to the development of fetal hydrops as demonstrated by the presence of a pericardial effusion and ascites. Indomethacin therapy resulted in the desired restriction of the ductus arteriosus and resolution of fetal hydrops. Maternal therapy was transitioned to ibuprofen and serial fetal echocardiograms ensured continued ductal restriction. Delivery occurred via cesarean at 36+3 weeks. The neonate did not require immediate cardiac surgical intervention and was discharged home with close follow-up. Discussion/Conclusion: A lower dose of prenatal NSAID therapy effected successful ductal restriction and hemodynamic mitigation of the circular shunt, resulting in reversal of hydrops and avoidance of postnatal cardiac surgical intervention.

S. Karger AG, Basel