Which congenital hea disease is associated with pre excitation ?

ebsteins anomaly is a congenital hea condition which is associated with pre excitation Ebstein anomaly is a rare hea defect in which the tricuspid valve -- the valve between the upper right chamber (right atrium) and the lower right chamber (right ventricle) of the hea -- doesn't work properly. As a result, blood leaks back through the valve and into the right atrium. Ref Harrison 20th edition pg 1553