My daughter is 11 years old. For the last 3 weeks she has had a racing heart beat. Ecgs performed, holter monitor results all clear. We understand this is not a heart problem. In the last 2 weeks she has had chest pain when the palpitations occur. Her father had graves disease, I have rheumatoid arthritis. Initial blood tests show results all good but rheumatoid factor high. Pediatrician has said anxiety, however she has not had any issues, is open with me and is quite a happy child when she is not having these attacks. I'm worried there is an underlying physical problem, but it's easier for everyone to just say it's anxiety. Please help.