Internal view of the left ventricle shows an anomalous muscular band that joins the free wall with the ventricular septum (stylus) in a heart with Ebstein's anomaly. The echocardiographic image shows an anomalous band in the left ventricle similar to that of the anatomic specimen. Note the tethering of the tricuspid septal leaflet (asterisk) to the ventricular septum. LAA: Left atrial appendage; AMB: Anomalous muscular band. Other abbreviations as before.