Final answer:
The important factors when considering surgical repair in Ebstein's anomaly include the degree of anterior tricuspid valve prolapse, the degree of 'atrialization' of the right ventricle, dysplasia of the valve leaflets, and extent of leaflet tethering.
Step-by-step explanation:
The important factors when considering surgical repair in Ebstein's anomaly include the degree of anterior tricuspid valve prolapse, the degree of "atrialization" of the right ventricle, dysplasia of the valve leaflets, and extent of leaflet tethering. Therefore, the correct answer is none of the above, as all the factors mentioned are important in considering surgical repair in Ebstein's anomaly.