| WHO II (if otherwise well and uncomplicated) |
| • Unoperated atrial or ventricular septal defect |
| • Repaired tetralogy of Fallot |
| • Most arrhthmias |
| WHO II–III (depending on individual) |
| • Mild left ventricular impairment |
| • Hypertrophic cardiomyopathy |
| • Native or tissue valvular heart disease not considered WHO I or IV |
| • Marfan syndrom without aortic dilatation |
| • Aorta < 45 mm in aortic disease associated with bicuspid aortic valve |
| • Repaired coarctation |
| WHO III |
| • Mechanical valve |
| • Systemic right ventricle |
| • Fontan circulation |
| • Cyanotic heart disease (unrepaired) |
| • Other complex congenital heart disease |
| • Aortic dilatation 40–45 mm in Marfan syndrome |
| • Aortic dilatation 45–50 mm in aortic disease associated with bicuspid aortic valve |
