I didn’t like the guy, but I had a good friend (she has since died as well) who lost her mom from the same thing. She went in for her GB and ended up getting a fatal string of complications. You just never know. There is no such thing as “minor” surgery.
She actually recovered from that but later during heart valve surgery she was one of a very small percent that reacted negatively to heparin. After three months in ICU she died on All Soul's Day.