Implantable cardioverter-defibrillators?
it would be best for you to ask a doctor about all your doubts, you have every right to completely understand procedures concerning your health. concerning your question, you die when your heart stops not the other way- it will continue to try and treat key rhythms back to sinus so if your heart has stopped i assume that it was not successful-though it will probably still try.
If you are at end of life and do not wish to be repeatedly shocked, you can have the defib turned off. You can also have your wishes written into a DNR order, instructing doctors about what to do with it as you near the end. If your doctor isn’t happy with questions, you need to find a doctor with more patience. I recommend writing all your questions down and sending them to the doctor’s office in advance. That way, they’ll have a chance to ponder them before seeing you.