I've had seizures of some type 6 times in eight weeks following coronary bypass. The first 4 during the first two weeks after bypass. Each time have been following some physical activity. The first two occurs when walking less than 50 yards supported by holding onto a wheel chair. The third returning from the bathroom unsupported and the fourth while sitting in the shower. The fifth occured about 4 weeks following discharge after standing at at counter in a store and the sixth after light exercise for thirty minutes in cardiac rehab. Each time the symptoms have been the following. Light headedness, dizzy, a little nausea some sweating. kind of clamy (to myself life is going on as usual) to the observers (all Registered Nurses, usually two or more) my upper body becomes tense, my eyes roll into the back of my head, slight twitching of the body and on at least two occassiona the observera stated I stopped breathing. After shouting (and to myself, it's as if it finally registers the I should answer) I come back to reality. Afterward I may feel some slight weakness for up to 24 hours, but otherwise feel fine. CT scan and neurological tests were perfomed before discharge both was negative. After the episode two days ago when in Cardiac Rehab CT Scan was fine. The nurse at Cardiac Rehab stated the heart monitor did not show in abnormal cardiac signs when the seizure was occuring. Nurses in the past noted at least three time that my blood pressure was below normal limites, once reading 70/40 ranges, after each occurrence the b/p returned to normal, neither high or low, but with in a 120's/70's range. Doctors notes have read "syncope" vice "seizures although the Nurses have stated to me they were seizures. Of course with this I'm more than weary. What if this occurs when I'm asleep and there no one to wake me or if I'm alone. I would like some definitive diagnosis.