Types of lesions in patients with congenital heart diseases in six referral hospitals
| Types | No. of patients | % |
| Ventricular septal defects | 393 | 34.9 |
| Atrial septal defects | 239 | 21.3 |
| Patent ductus arteriosus | 201 | 18.1 |
| Tetralogy of Fallot | 80 | 7.2 |
| Atrioventricular septal defect (variants) | 47 | 4.2 |
| Congenital pulmonary valve stenosis | 43 | 3.8 |
| Coarctation of the aorta | 25 | 2.2 |
| Transposition of the great arteries | 23 | 2.1 |
| Others | 69 | 6.1 |
| Total | 1119 | 100 |