They occurred once every 6 to 12 months until last year when they started occurring once every three months. Each episode was preceded by feelings of dizziness, nausea, rapid
heartbeat, sweating, and I would turn pale. Recently, I would sometimes also experience vomiting afterward. I have had repeated EKG's with normal results. I had an abnormal EEG, but a subsequent sleep-deprived EEG came back normal. My doctor has also ruled out epilepsy or other brain disorders with an MRI.