Has anyone else who has had an SVT attack had mini-blackouts during? In the days leading up to my attack with palpitations for days, I was having this for seconds at a time, and during the attack in A & E, with heart going up as high as 300bpm for 4-5 hours, I'd be unable to speak for just a minute or so, and I heard the nurse call this 'instant seizures'. With one attack only, I am wondering if this is partly why I was fast-tracked for an ablation (which I have cancelled as I couldn't get to meet with the EP beforehand with my questions). Anyone know if these were TIAs? Thanks.