<unk>  can be diagnosed prenatally or after birth via echocardiography. Typical findings include a small<unk>  ventricle and aorta, abnormalities of the mitral and aortic valves, retrograde flow in the transverse arch of the aorta, and<unk> -to-right flow between the atria. It is often recognized during the second trimester of pregnancy, between 18 and 24 weeks' gestation.
Hypoplastic left heart syndrome
Hypoplastic right heart syndrome
Asphyxiating thoracic dysplasia
Double aortic arch
Pulmonary atresia
Double outlet right ventricle
Pulmonary hypoplasia
Congenital diaphragmatic hernia