Ventricular septal rupture with dissection of the interventricular septum is an extremely rare complication following myocardial infarction, and the optimal surgical strategy remains unclear because of the limited number of surgical cases. Here we report a case of ventricular septal rupture with dissection of the interventricular septum, which we treated using a modification of the extended double patch technique via false lumen incision to close the ventricular septal rupture and exclude the dissection cavity.