susan
Dear James, I went thru a similar problem with my son 8 yrs ago. After many Doctor visits, and every test the neurologist could think of, I took him to a cardiologist. Turned out, he had a problem with his heart rhythym, which wacked out his blood pressure and caused grand mals. This is very treatable. Basically, they put him on a very low dose of digoxin, to regulate his heartbeat. He has been on this now for 8 years, however, he is now 23 yrs old, and the picture of health, lives a completely normal life, plays sports etc. Might be worth a trip to the cardiologists. Hope this works out well for your daughter, and try not to stress out, you will find an answer.