In a coronary care unit, how do you make the decision to give nitro-vs-morphine for unrelieved cp? The example I am thinking of is a guy who came in thru the ED with CP, no EKG changes, and then continued to have cp. Every two hours he recieved morphine. BP 120s-130s. And what would you expect to see done differently for the same unrelieved cp but with initial EKG changes?