My granddaughter, 13 years old, is having problems with rapid heartbeats.She is a pitcher on a fast pitch softball team. Initially, she had 2 seizures/convulsions & passed out (within 10 minutes) while walking to the car, when she was taken to the emergency room. She had another one there. The EKG at the emergency room showed a problem, but she was later told that it was not working correctly. She has had 2 EKG s since which were normal. She has worn a heart monitor, but they haven t gotten the results back yet. She had a thyroid test, which showed .74 (I don t know what that means). My daughter says that the doctors that she has seen don t seem to be concerned about the fact that she still is having rapid heartbeats when she plays ball & is telling her that they can t tell her anything until they get the results of the heart monitor. They said that she could continue playing ball. She is supposed to go to a softball camp next week and my daughter is worried about sending her. Should we be concerned?