If it were my patient, I would focus on the recent stroke and elevated troponin levels. Elevated troponin levels are often correlated with myocardial damage. Was her CK-MB elevated as well? When you have myocardial damage, the heart doesn't contract efficiently and tissue perfusion decreases. When organs aren't getting perfused well, they start losing their function. So if the brain isn't getting perfusion, you're at great risk for stroke. I think focusing on the perfusion is more higher priority than the UTI. My fundamentals teacher always said, ask yourself "what can kill you first?"