So recently within the past week, I've blacked out multiple times but avoided the fall due to someone catching me. It all starts out with my head tingling, then my vision getting progressively darker & my vision goes very dark very fast & then I get extremely sweaty but feel cold at the same time. However, my blood pressure and everything was all fine. So, I was sent for an ekg to check for SVT which my doctor had thought that was what I had, but after looking at my ekg results he said it was definitely NOT SVT. He asked another dr and he had never seen it before either. It doesnt matter if I've been sitting or standing, but randomly this event will happen if I don't sit immediately. Any idea what this may be? I'm waiting to be seen by a cardiologist