My 22 year old brother has taken his first seizure in febuary 14. He had an eeg done 3x cat scan and mri. Tsh, free t4, cmp, cbc done. All off which returned normal. He has had a total now of 4. He was prescribed keppra 500mg bid. After 3 months requested to be weaned off the drug. Has had 2 seizures since weaning. Oddly, during his last eeg, the tech noted on the eeg to the neurologist that his heart rate dropped to 40 and his pulse ox dropped to 76%. Then returned to normal. My brother is having nocturnal seizures. 2 have been upon waking and 2 after falling alseep a few hours. I am leaning towards a cardiac condition. Any help?