My Husband Is 55.. A Year Ago He Suffered A

my Husband is 55.. a year ago he suffered a massive 100% blockage widowmaker heart attack followed by cardiac arrest three days later.. He now has a icd.. is on tons of heart meds.. He lost a ton of weight but does not eat healthy just less.. He doesn't exercise and won't wear his c-pap to sleep.. He has a very high stress job and I am concerned for his life. How long do they usually survive after this type of cardiac event? He has one stent and has about 34% of the big area working