Lisa
Have either of your children had a Head Up Tilt Table Test? This is a test designed especially for syncope/fainiting, dizziness and pre-syncope/nearly fainting. Pediatric Cardiologists often recommend this test for adolecent's who have been fainting. It's simple and non invasive (meaning done with the outside of the body, no catheters going inside, aside from an IV which must be started prior to the test-normal sailine-not medication).