Yes, had loads of problems with it last year, generally got stuck with a heart rate between 160 and 170 bpm, no problems capturing it on an ECG as was going for over an hour at times, luckily it did self-revert. I work in a hospital so it was quite easy to do this. At other times, I could get rid of it by doing forceful blowing against closed hands. Was started on beta blockers which calmed everything down to some extent, and opted to have a cardiac ablation (had a five month wait for this as it's not a urgent procedure). Can't believe the difference it's made, off medication now, no longer getting half as knackered and my running and rowing times have gone back down to where they were five years ago