yes I get a feeling like mi heart is beating irregular and this scares me,so far this goes away after a few seconds. I'm having an ehco cardiogram done and an event moniter put on for 7 days, hope to find out something.I drink a lot of diet caffiene free drinks but I don't know what effect this has on me.my condition seems to be getting worse. I also have anxiety and barretts eshogus.