Internal view of right chambers. There is anatomic continuity between the septal and posterior leaflets tethered to the right ventricular wall, forming a cul-de-sac (arrows) with reduction of the apical portion of the ventricle, which is occupied by multiple trabeculae. The echocardiogram shows similar features to those seen in the anatomic specimen. TFO: Tricuspid functional opening. Other abbreviations as before.