I was diagnosed with AF about two years ago and was given amiodarone and a lot of other medicine.. None of which helped very much. And I had long periods of leaving me out of breath. I I then read on the Internet that losing weight and getting back to normal weight could reduce AF by 65%. I was so desperate that I gave it a try. Using the 5:2 diet I succeeded in getting my weight down by 35lbs and I have kept it off. I've had no problems with AF ever since and I'm not taking any medicine other than 80 mg of valsartan, which I have been taking anyway for several years. This weight loss had another very good effect on my COPD with my pulmonary function test (spirometry) much better than ever before.. It was very hard to get the weight off, but it was very well worth the effort.