@kick I see your reasoning, and I support it....for what that might be worth to you. I have seen posts across sites dealing with heart arrhythmias where people state that their BP plummeted, but so did their heart rate. In some cases, to the point of long pauses, like 10 seconds or more with no beats (my hand is up). If we can safely, and reasonably, predict that your claimed '...usually 117/59...' is correct for almost all of the time when you're not active and lifting things or moving quickly, that's not a bad set of numbers...enviable for many of us. But, you won't know if those numbers will fall too far, especially the diastolic 59, unless you agree to do a trial of the metoprolol...which can help if all else is good. Just offering that as a way to not rule out something your cardiologist thinks might be of benefit to you, and who knows, it may help to reduce your anxiety in the long run if you know you have a strong 'team' working for you.

My AF, a progressive disorder, was beginning to pick up speed on its slide toward persistent AF, at which point it becomes more involved to tame and to treat, such as with an ablation. At one point I was up to 150 mg of metoprolol and felt tingling on the back of my neck and felt weird...while driving! !!! Later, when I was in intensive care for recurrent arrhythmia, and had just been re-upped to the 150 mg of metoprolol, the nurse came running into my room only to find me chatting with my wife...unaware. She held her forefingers about ten inches apart and said they had watched my heart pause 'that long' on their monitor. (Gulp!) I stopped metoprolol right then and there and was prescribed amiodarone. But I followed the helpful and concerned internist who actually managed to get ahold of my very busy EP and they agreed that I must cease metoprolol and start amiodarone. So, my long point is that the drug may be helpful, but if you elect to decline to take it, you'll never know. With reasonably monitoring, say every hour for the first coupla days, you may find that you handle the metoprolol well, that it doesn't ash-can your BP, and that you find yourself pleasantly surprised at how well it makes you feel.