I was diagnosed with AF in June this year. My heart rate is being controlled with 2.5mg of bisoprolol and 187.5micro-grams of digoxin. This is doing quite a good job and occasionally I go back into sinus rhythm although 90% of the time my heart rate is very irregular. I am also on warfarin. I am awaiting an electro cardioversion in the next 3-4 weeks when my INR is stable. The problem I have is that no two days are the same. Some days I feel really well, almost normal and other days I am absolutely exhausted. Is this normal? When I was first diagnosed after the initial worry of having a heart problem and putting my life on hold at times, I decided to just get on with things, meeting up with friends, doing jobs around the house etc and I was doing quite well most days, but the last few days I have felt absolutely exhausted. My pulse is often quite slow (45-55) and I am wondering if it is this that is causing the problem. Can anyone give me some advice? Should I make an appointment to go back and see my cardiologist or my GP or should I just put up with it and wait to see if the cardioversion works? I just want to get on with life and not be controlled by this condition. It is very frustrating.