I am sure RetNavyHM will answer soon...in the meantime, if DoDMERB disqualifies you for a history of ventricular septal defect (VSD), it is possible to get a waiver if you have a normal echocardiogram.
Do no let the possibility of a DQ for a VSD stop you from applying! Keep moving forward and be gathering all records pertaining to your history of VSD.
Good Luck!