I am so sorry for what your Granddaughter is going through.
It may be totally unrelated, but you may want to check into dysautonomia's. There is a forum specifically for that on this site and you can also do internet searches. There are different dysautonomia's but one is Postural Orthostatic Tachycardia Syndrome (POTS) and has various symptoms including passing out.
Just a thought.....something to check in to.
I hope you find answers very soon.
Hello,
I am very sorry to hear about this at such a tender age.
For syncope/fainting to occur, either the reticular activating system in the brain needs to lose its blood supply, or both hemispheres of the brain need to be deprived of blood, oxygen, or glucose.
So it can be due to fall in BP, hypoglycemia, dehydration and inadequate electrolytes(sodium and calcium) in the body, postural hypotension, blockage of arteries supplying blood to the brain esp. the carotids,anemia,vasovagal attacks or underlying neurological conditions.
Have you got a CT/MRI head done of your granddaughter?I sincerely advise you to consult a neurologist and discuss the abve possibilities with him.
Hope it helps.Take care and pls do keep us posted on how Lindsay is doing or if you have any additional queries.