This question is relevant to a lot of people beyond this poor guy and his grandpa:
How would you help rekindle an elderly man’s interest in living?
Kind of personal and grim, I do apologise for that in advance.
My grandpa who is nearing 70 has had a bypass and the doctor told him that the most important thing to do for recovery is walking as his extremities can still clog up and constrict since he is very overweight. However, he’s kind of resigned on improving his condition because it hurts.