Embolism was apparently the complication that did him in. Edit: Shoulder surgery was for cancer, so not an orthopedic operation as I had thought.
http://autoweek.com/article/car-news/marchionne-suffered-embolism-during-cancer-surgery
Noah, how common is that? I would guess smoking is a risk factor in embolisms. And you probably can't be on blood thinners when having surgery ...
G