The source of the confusion is that, while now they say they wouldn't go that far, they did say they would go that far when they were on the stand.
Felos asked, (paraphrasing) "if she got gangrene in her legs, would you cut them off?" The answer was "yes" . Then he kept asking more gruesome scenarios and to each, the answer was "yes". I can't remember (brain is zzz) who was asked - I got the impression it was all of them, tho.
They got a lot of heat for it.
Since then, they have said they wouldn't take it that far.
I think they would amputate for gangrene. I don't think they'd do open heart surgery tho - just my personal feeling. I know they were against Karen Anne Quinlan being removed from her ventilator, even after all those years in that state. So, they definitely have very strict standards there.
Why are you still awake and posting??? :-)