Greetings Gojoe! Have a hug for this situation.
The very fact that a person would not want to be without one if the heart stops and they passed out in the store and meds were already tried might be some kind of flag to help a person make the correct decision. At this time Implantable Cardioverter Defibrillator might be one of the best things around to keep it going. The risk to putting one in is supposed to be low.There are life threatening risks to putting it in such as blood around the heart and infection can also occur.
Also a person must ask themselves considering the things which have happened the risk of not putting one in. The medicines often are not that healthy for the kidney's and liver and washes the rest of the body in the chemicals put in anyway if it is any comfort. The Implantable Cardioverter Defibrillators's I have seen do seem rather large. It seems that one the size of a small computer chip and covered with non toxic material such as steel might be good if they are available yet. Of course everyone makes their own health care decisions in life. I wish the best, my sympathies. Peace, sjb