My fiance has been experiencing strange heart episodes that his cardiologist cannot explain beside it possible being anxiety , every few months he will have an episode that starts in the stomach a fluttering then gets a bit dizzy little chest pain and some sweating the episodes do not last long, today he had another one but felt like shocks going through his chest an arm , lasting only seconds, he has regular check ups with his cardiologist, wishing we can find answers to these scary frightening episodes..