I have a friend, aged 48, who was just checked by paramedics for severe low back pain. He felt that he had to vomit, but it was dry heaving. Paramedics checked him and by that point he said he felt better and they noted he was very dehydrated, which is a problem he often experiences. Additionally, he occasionally develops an irregular heartbeat which can last up to 8 hours. He s being treated by a cardiologist, but in my opinion, not very well. What could this be?