Common symptoms include a grayish-blue (cyanosis) coloration to the skin, lips, fingernails and other parts of the body. Other pronounced symptoms can be rapid/difficulty breathing, poor feeding, cold hands or feet, or being inactive and drowsy. "In a baby with hypoplastic left<unk>  syndrome, if the natural connections between the<unk> 's left and<unk>  sides (foramen oval and ductus arteriosus) are allowed to close, he or she may go into shock." Signs of shock can include cool or clammy skin, a weak or rapid pulse, and dilated pupils.
Hypoplastic right heart syndrome
Hypoplastic left heart syndrome
Asphyxiating thoracic dysplasia
Pulmonary atresia
Pulmonary hypoplasia
Congenital diaphragmatic hernia
Absent pulmonary valve syndrome
Double aortic arch