Long-term follow-up of atrioventricular valve function in Fontan patients: Effect of atrioventricular valve surgery.

In a homogeneously treated Fontan population, 25-year transplant-free survival is encouraging. Atrio-ventricular valve surgery was necessary in 12.4%, resulting mostly in a durable valve function. However, a slow time-related decline of atrio-ventricular valve function as of ventricular function is worrisome, evoking a role for additional heart failure therapy.