heart ventricle septal wall thickness heart interventricular end-diastolic septal wall thickness 2018-05-15T17:12:15Z CMO:0002791 IVSd The thickness, width or depth of the septal wall of the heart ventricles (that is, the portion of the wall between the left and right ventricles that is shared between the two) at the end of diastole when the heart muscle is maximally relaxed. VT:0007086 clinical_measurement_ontology heart interventricular end-diastolic wall thickness heart interventricular septum end-diastolic thickness jrsmith