Table 2 Cardiac anomaly of patients enrolled
| Cardiac anatomy | Count (n) |
|---|---|
| Cyanotic heart disease | |
| Tetralogy of Fallot | 59 |
| Pulmonary stenosis | 12 |
| Pulmonary atresia | 1 |
| Total | 72 |
| Acyanotic heart disease | |
| Ventricular septal defect (VSD) | 34 |
| Atrial septal defect (ASD) | 7 |
| Patent ductus arteriosus (PDA) | 1 |
| Mixed type (including VSD、ASD or PDA) | 30 |
| Total | 72 |