Figure 13: A heart with Ebstein anomaly. A - The right ventricle is opened showing the anterior tricuspid leaflet (AL) with multiple small fenestrations (*) and nearly continuous attachment of the anterior leaflet free edge to the RV wall. B - The right atrium and right ventricular inflow have been opened. The fossa ovalis (FO) and coronary sinus (CS) are seen in the right atrium. The black dotted line indicates the anatomic annulus of the tricuspid valve and the white dashed line the actual hinge point of the septal tricuspid leaflet. The space below the white line is the atrialized right ventricle. The black curved arrow indicates the superior rotation of the functional tricuspid annulus toward the RV outflow tract.