I am so sorry for your loss. It makes me cry. My grandpa ultimately died from a broken hip. I somehow feel it was my fault because I stopped over at his house before going out with friends and I didn't plug in the Christmas lights. As I was pulling out of the driveway I thought I should return to plug in the lights, but didn't. Later that night he broke his hip plugging in the Christmas lights. He was in his 80s, so his health deteriorated after that.
He is in heaven now and so is your Papa.