A<unk>  is a group-type of congenital heart<unk> s (CHDs).  The patient appears blue<unk> , due to deoxygenated blood bypassing the lungs and entering the systemic circulation. This can be caused by right-to-left or bidirectional shunting, or malposition of the great arteries. Such<unk> s include persistent truncus arteriosus, total anomalous pulmonary venous connection, tetralogy of Fallot, transposition of the great vessels, and tricuspid atresia.
Cyanotic heart defect
Aortic arch anomalies
Hypoplastic left heart syndrome
Hypoplastic right heart syndrome
Heart valve dysplasia
Lung agenesis
Congenital heart block
Aortopulmonary fistula