My mother lost her battle with heart trouble several years ago. Thankfully, she only really suffered for the last 9 months or so. For the last two years of her life, I came home from work and took her to her doctor's appointments and such, and spent a lot of time with her to keep her company, and to see that she ate properly. I think that time meant more to her than she ever could express. Others in the family did as much as they could, with most of them living farther away from home.
Dustin, the help you give them and the quality time you give them will serve them well and make you a better man in the bargain.
Keep up the good work.