An implantable defibrillator is indicated if someone is successfully rescuscitated after an episode of sudden cardiac death caused by a dangerous heart rhythm such as ventricular tachycardia or ventricular fibrillation. The thought is that if someone has had one episode of sudden cardiac death¸ they are more likely to have another. One he has recovered from the device implantation, there should be little limitations on his activity such as running or push ups. The army may have their own criteria for medical retirement, but your husband likely should be able to resume all activity with the defibrillator in place.
