My sister's oldest boy has now been in the hospital for 8 days.
Original symptoms were a severely upset tummy with uncontrolled vomiting.
He was taken in to get intravenous anti-nausea meds which helped.
Went home and was found unconcious by his mom.
Back in and hooked up to blood pressure and urine sampling equipment.
He has intermittent episodes, once or twice a day ~ 20 minutes long.
During these, his blood pressure goes to 200/160 or higher, heart rate 200 bpm or higher.
His pupils dilate and he feels panic and anxiety.
He is a straight A student, gifted musician and published author, lives in his parent's basement; no drugs or alcohol.
He is being given Alpha and Beta blockers, has had an almost full body CT scan and we are no further ahead.