my 79 yr old mother has had triple by pass after a heart attack. she is in rehab now and we have been informed that her heart is working at 20%. she has refused a life vest and pacemaker. She has been a "clean eater" for years and was actually a vegetarian for over 20yrs. right before the attack she had been walking and lost about 70lbs, there was no pain just severe loss of breath , which she is still experiencing. what would you anticipate her life expectancy at this point?