When I was in middle school I was diagnosed with supra ventricular tachycardia. Here recently I have been experiencing more frequent attacks or episodes. Something new has been happening and I am not sure if is related to the supra ventricular. My heart feels like it is getting bigger, and tight, my face gets beat red and it feels like it is swelling up. Kind of like someone has put a kink some where and all of my blood is rushing and filling in my face. It is also a little harder to breath. When this happens I have not been doing anything, I have been either standing still or sitting.