Table 1.
Diagnoses of the 149 patients studied
| Diagnosis | Number |
| Univentricular heart (8 after Fontan surgery, 1 after bidirectional Glenn anastomosis, 1 after atrioseptectomy, 3 without surgery) | 13 |
| Congenitally corrected transposition of the great arteries | 9 |
| Transposition of the great arteries (4 after arterial switch operation, 20 after Senning procedure, 23 after Mustard procedure) | 47 |
| Tetralogy of Fallot | 32 |
| Truncus arteriosus | 2 |
| Aortic coarctation | 7 |
| Aortic valve stenosis | 3 |
| Pulmonary stenosis (4 valvar, 1 infundibular, 1 peripheral) | 6 |
| Ebstein’s anomaly | 7 |
| Atrioventricular septal defect | 1 |
| Ventricular septal defect | 5 |
| Atrial septal defect | 3 |
| Persistent foramen ovale | 3 |
| With mitral valve prolapse | 3 |
| Abnormal left coronary artery originating from the pulmonary artery | 1 |
| Left ventricular aneurysm of unknown origin | 1 |
| Idiopathic dilatation of the pulmonary artery | 1 |
| Structurally normal hearts tested for the assessment of arrhythmia | 5 |