Wow...that was a ride and a half. I'm sorry you had to go thru that although it sounds like you're familiar enough with his cycles, it didn't seem to surpise you. It was good you kept as calm as you could, and better that you left when you could tell your presence wasn't helping matters.

I know you feel somewhat responsible of him, but I don't know that contacting him is the best thing in your interests. His issues, aside from the (possible) MI is that he has a drinking problem and that is something he needs to deal with first, before anything else.

Take care of yourself