Chest radiograph of repaired tetralogy of Fallot with severe pulmonary valve regurgitation

Chest radiograph from a patient with repaired tetralogy of Fallot with severe pulmonary valve regurgitation. The posterior-anterior film (A) demonstrates cardiomegaly due to right heart enlargement and enlargement of main pulmonary artery. Also noted is a right aortic arch. The lateral projection (B) shows obliteration of retrosternal space due to right ventricular enlargement.