I had a lap chole 3 months ago without complications. 1 month ago I developed a sudden onset of light headedness twice in one day. I was not weak, shaky, sweaty or tachycardia. I was not hypoglycemic. The next day I had 3 episodes that were the same as the previous day. My heart rate and BP were normal. I had a 4th episode where I lost consciousness, respiratory arrested and had seizure like activity. The only abnormal labs were Mg, K, Na and protein which were only slightly decreased. Diagnostics were all normal: Head CT, MRI, echocardiogram, LP, and stress test. My resting heart rate is 70's but increases to 140's with minor activity. I've been told that no cause can be found for what happened to me. As a side note, I am healthy, ideal body weight, exercise aerobically 150 min/week, eat healthy, don't smoke or use alcohol. Other than hormone replacement, I don't take any medication.