The metoprolol had been prescribed as a rate control medication when I saw a cardiologist for the first time after a formal (ER) diagnosis of paroxysmal AF about three months earlier. Then, three years went by before I was given the angiogram, and that was to rule out ischemia as the cause of my AF. Had they found significant blockages, the EP would have declined to ablate me as his efforts would probably have been successful for only months, if at all. So, a waste of resources on a badly diseased heart. Fortunately, I was given a thumb up by the surgeon manipulating the catheter in my arm. My guess is that it's standard to give bisoprolol, metoprolol, or diltiazem to AF patients to keep a lid on their hearts IF they do go into AF now and then.