Had my ablation done on January 28. Don't know if this is just normal or what. I have the occasional flutter and some ectopics. I have been off the dofetilide for about a month maybe a little over. I have noticed that when I swim I'm starting to feel a little tired and start breathing hard. I stop and rest for awhile and sometimes I can finish my laps and other times I have to stop and rest again. I initially though I just was short of stamina but I'm inclined to think it has something to do with my heart. Maybe I need a warm up period now unlike before. On the other hand my cycling is going great. No issues whatsoever.Any ideas. Oh, I do swim bright and early in the morning. Could be I need to swim later.