<unk>  occurs when parts of the<unk>  side of the<unk>  (mitral valve,<unk>  ventricle, aortic valve, and aorta) do not develop completely. The condition is congenital (present at birth).
Hypoplastic left heart syndrome
Hypoplastic right heart syndrome
Aortic arch anomalies
Single ventricle
Pulmonary atresia
Double outlet right ventricle
Congenital diaphragmatic hernia
Total anomalous pulmonary venous connection