<unk> <unk>  is a rare cyanotic congenital heart defect (CHD) in which all four pulmonary veins are malpositioned and make anomalous<unk> s to the systemic venous circulation. (Normally, pulmonary venous return carries oxygenated blood to the left atrium and to the rest of the body). A patent foramen ovale or an atrial septal defect must be present in order<unk> low systemic blood flow.
Total anomalous pulmonary venous connection
Partial anomalous pulmonary venous connection
Transposition of the great vessels
Persistent truncus arteriosus
Dextro-Transposition of the great arteries
Double outlet right ventricle
Interrupted aortic arch
Single ventricle