question: My daughter is seeing a Doctor tomorrow as a follow up for dealing with low blood pressure. She is 13, a competitive gymnast and has been experiencing light headed, dizziness periodically for almost a year. She had a blood pressure monitor take readings for 24 hours and it showed it was low at different times including when she was sleeping. Her ECG and bloodwork results are normal, I want to be sure that we rule out anything that could be serious ~ especially heart conditions. Any suggestions of things I need to ask?