Account for approximately 25% of all CHD’s

Shunt right (non-oxygenated) to left (oxygenated)

Tetrology of Fallot

Total anomalous pulmonary venous connection

Hypoplastic left heart syndrome

Transposition of the great arteries

Truncus arteriosus (persistent)

Tricuspid atresia

Interrupted aortic arch

Pulmonary atresia

Pulmonary stenosis

Eisenmenger syndrome (reversal of shunt due to pulmonary hypertension)

Patent ductus arteriosus (may cause cyanosis in late stage)

Tx: Indomethacin for closure