<unk>  is an extremely rare form of congenital heart disease in which the<unk>  valve does not form properly. This leads blood from the right side of the heart cannot go to the lungs to pick up oxygen. Also, the right ventricle and tricuspid valve are often poorly developed.<unk>  is always associated with other congenital heart disease such as ventricular septal defect, tetralogy of Fallot and<unk> tent ductus arteriosus. The cause is not clear. Usual symptoms are cyanosis, shortness of breath, fast breathing and fatigue. Echocardiography and cardiac MRI can tell the diagnosis of<unk> . Treatments include prostaglandin E1, catheter-based procedures and surgery. Prognosis of<unk>  depends on whether the surgery has been done and the severity of other associated congenital heart diseases.
Pulmonary atresia
Bronchial atresia
Lung agenesis
Congenital diaphragmatic hernia
Esophageal atresia
Single ventricle
Intestinal atresia
Situs inversus