Diagrammatic illustration of the various segments of the ventricular septum as viewed from the left ventricle (panel A) and along the length of interventricular septum (panel B): membranous (MS), infundibular (IS), trabecular (TS), inlet (IN), and atrioventricular (AVS) septum.
LA: left atrium; LV: left ventricle; RA: right atrium; RV: right ventricular; AV: aortic valve.