Will a child with ebstein's anomaly require a heart transplant?

Unlikely: End-stage cardiomyopathy and congenital heart disease with ventricular failure are the primary indications.

Usually not: Ebtsein's anomaly is often mild and may be asymptomatic for a long time. Moderate or severe cases with a lot of leakage of the valve usually require surgery to repair the tricuspid valve. These are mostly successful nowadays transplant is rarely indicated.