This is also my understanding. There is some modestly strong evidence in the literature that the heart's size can reduce somewhat, even a lot in a few cases, once the arrhythmia is stopped and/or moderated a great deal. That was my thinking behind insisting upon an ablation, which I'm so very grateful worked on the second go. I have read numerous people claim that their atria have shrunk some, back to a near-normal size, while others insist it won't happen...and doesn't.

If I were you, I would have asked for clarification for his/her recommendation to cease the flec and metoprolol. But, it all depends on whether or not you are frequently in arrhythmia. If you're rarely in arrhythmia, then there won't be much remodeling going on, even if some is extant already. So, no need for medication. Keep the potency of the medication foremost for when you DO need it. But, if you're in arrhythmia two or three times each week, for years now, then I don't understand why the instruction you received.