When you're on a blood thinner, it's a dreadful problem. You continue to bleed much more, and over a longer period of time.

If it was a massive stroke, this was a desperate attempt to save his life.

The decision to put him on a blood thinner is a little questionable. I don't know the details of this case, but the use of blood thinners to prevent ischemic strokes [those caused by clots] has been challenged by several studies. It is a curious decision.