Internal view of the functional portion of the right ventricle shows a redundant anterior leaflet that inserts directly into the septum and right ventricular free wall, forming a curtain that separates the atrialized and functional portions of right ventricle. Note the functional tricuspid opening (arrow) in a subinfundibular position. The echocardiographic long axis image of right chambers shows the separation between the two portions of the right ventricle by a redundant and irregular anterior leaflet. PA: Pulmonary artery. Other abbreviations as before.