Cor triatriatum is an extremely rare, congenital (present at birth) heart defect. Our Nemours Cardiac Center team has the experience and advanced pediatric imaging needed to provide diagnosis, treatment and surgical repair of rare pediatric heart defects like cor triatriatum. If your baby has cor triatriatum, our board-certified, fellowship-trained pediatric cardiologists and heart surgeons are here to answer your questions, ease your concerns and provide the latest treatment options. Our pediatric heart care teams offer patient families research-backed care, delivered in a family-centered setting.