When it started, I was tested for thyroid and had EKG done, normal results. Dr. at the time ruled it as anxiety attacks
. But the attcks are very short- lasting 30 seconds-1 minute. Attacks feel like: sudden jolt starting in head, quick blurred vision (sec), weird sensation of warmth spreading down my left arm, left side of body, to left leg and out my left foot. Feels like I'm going to faint, but after 12 years, never have.