My 14 year old daughter had a heart rate of 30 for weeks. Normal weight, slightly low blood pressure, ANA of 1:640 speckled (since retested numerous times and it has been normal), normal EKG, normal echo, normal Thyroid test, normal brain scan. She has been healthy for 2 years now but I am always worried that it may return. I have a copy of her chart. Any ideas out there?