Study population characteristics
| Functional class I and II* | 88 (77%) |
| Functional class III and IV* | 17 (15%) |
| Dilated cardiomyopathy | 38 (33%) |
| Functional single ventricle | 15 (13%) |
| Pulmonary/right-sided obstruction | 11 (10%) |
| Aortic/left-sided obstruction | 10 (9%) |
| Ventricular septal defect | 9 (8%) |
| Tetralogy of Fallot | 8 (7%) |
| Atrioventricular septal defect | 4 (4%) |
| Patent arterial duct | 4 (4%) |
| Hypertrophic cardiomyopathy | 3 (3%) |
| Restrictive cardiomyopathy | 2 (2%) |
| Atrial septal defect | 2 (2%) |
| Mixed lesion/other | 8 (7%) |
All variables listed as N (%).
*Missing functional class in nine patients.