My Husband has been experiencing unexplained fainting, blackout and dizzy spells. He has been to a neurologist who thought the problem was cardiology. He then saw a cardioloisgt who had him to where a heart monitor for 6 weeks, but never came up with a diagnosis. The fainting, blackout and dizzy spells stopped and he began having unexplained severe adbsominal painds. When the abdominal poains stopped the fainintg, dizzy and blackout spells started back up. He has had cat scans, x-rays, ekg, eeg , colonoscpy and nothing has come up. Please help with a suggestion. My Husband is a diabetic with hgh blood pressure, his internist is in the process of re-medicating him to see if that is the problem. He recently completed a sleep disorder study that reveales he had mild sleep apnea , but no narcolepsy.