heart right ventricle posterior wall thickness heart left ventricle anterior wall thickness heart ventricle septal wall thickness 2012-07-27T05:59:34Z JSmith SWT The thickness or depth of the septal wall of the heart ventricles. The septal wall is the portion of the heart left ventricle ventral/anterior wall and right ventricle dorsal/posterior wall which is shared between the ventricles. antero-septal wall thickness heart interventricular septum thickness heart intraventricular wall thickness heart ventricle septal wall thickness heart ventricle septum thickness