Classification of lesions in congenital heart disease
| Type of lesion | Lesion anatomy |
| Simple | Atrial septal defects |
| Sinus venosus defects | |
| Ventricular septal defects | |
| Aortopulmonary window | |
| Patent ductus arteriosus | |
| Total or partial unobstructed anomalous pulmonary venous return | |
| Combination | Combinations of simple lesions |
| Complex | Atrioventricular septal defects |
| Truncus arteriosus | |
| Single-ventricle physiology with unobstructed pulmonary blood flow | |
| Transposition of the great arteries with ventricular or arterial shunt | |
| Lesion dimensions | Small to moderate |
| Atrial septal defect ≤2.0 cm | |
| Ventricular septal defect and patent ductus arteriosus ≤1.0 cm | |
| Large | |
| Atrial septal defect >2.0 cm | |
| Ventricular septal defect and patent ductus arteriosus >1.0 cm | |
| Associated extracardiac abnormalities | |
| Repair status | Unoperated |
| Palliated | |
| Repaired |
Reproduced from [10] with permission from the publisher.