Changing the scenario midway does not help anyone. Unless you are implying you agree with me, and wish to discuss a new scenario.
To me the lines are clear: You don't have to take action to save his life, but you also can not kill him by your actions. i.e. if everyone froze at this moment and did nothing - would he live, or die?
But it's not murder if I wake up in the middle of the procedure, walk away, and you die on the operating table.