Accessory mitral valve tissue is a rare congenital anomaly that may cause left ventricular outflow tract obstruction. This may be the first case report in a neonate, describing accessory mitral valve tissue producing a significant left ventricular outflow tract obstruction, resulting in a duct-dependent systemic circulation perfusing the neck and head vessels. This report also discusses why a hybrid palliative strategy was adopted.
Al-Maskari et al. (Sat,) studied this question.