As a patient, I simply don't know what to do. I take very low doses of metroprolol but it seems to make symptoms worse. When it gets very bad I go to the ER where they do absolutely nothing for me. My cardiologist says Camzyos is too new, so that's out of the question. He's concerned with "long term" effects. I'm 66 years old. How "long term" does he think I have?