If you AFib symptoms are intolerable ablation should be considered. There are other
anti-arrhythmic besides Flecainide, have you tried any of them? What does you doctor propose?
I am in the aging bracket myself, approaching 72 and I have permanent AFib, but as said my AFib symptoms are tolerable, but you'll not see me running up an stairs or hills. AFib does significantly reduce my heart's ability to pump blood to support aerobic activities.