I had palpitations and flutters, so much that at times I felt light headed and thought I was going to pass out. (I'm 36) I went to the cardiologist too, and had a stress echo which was normal. I would only have ONE cup of coffee a day , and have about the same amount of stress that everyone else has. But I switched to decaf and guess what---no more palpitations at all!! I couldnt believe that one little cup of coffee a day made that much of a diffence, but it did.