| • Clinical |
| - cyanosis mild or absent |
| - congestive cardiac failure |
| - right ventricular impulse |
| - increased pulmonic component second heart sound |
| - variable ejection systolic murmur, apical mid‐diastolic murmur (in large left to right shunt), pansystolic murmur (with atrioventricular valve regurgitation) |
| • ECG |
| - prolonged PR interval |
| - superior frontal QRS axis |
| - partial right bundle branch block |
| - superior p wave axis (in associated left atrial isomerism) |
| • Chest radiograph |
| - cardiomegaly |
| - prominent pulmonary conus |
| - increased pulmonary vascularity |
| - left aortic arch |
| - left bronchial isomerism (in associated left atrial isomerism) |
