For the past 4 months my 12 yr old son has been dealing w/ bouts of

fainting, lightheadedness/vertigo? Each occurance has been while seated at school.

Tests he's taken to date: tilt table, stress, mri, eeg, ekg

echocardiogram, blood sugar. Of these, the tilt test induced fainting

but the cardiologist informed me that there was no change in my son's

blood pressure or heart rate.

When symptoms flare up at home it's usually when he awakens in the morning.

His condition doesn,'t affect him participating in normal activities.