Chris, late to this thread too. I am so very, very sorry to hear of your loss. My mother died many years ago. several large blood clots blocked the arteries to her legs and the toxins produced eventually caused her to loose consciousness. I had to make the finial decision not to use heroic measures to try to try to save or just keep her heart beating. Knowing my mother I made what I pray was her choice. There are many here that share your loss and pain as I still do all these years later.
No words can make it any better. Focus on the good times and be grateful for the time you had with her. You are in my thoughts and prayers