I am having some weird new Heart symptoms. I have had pvcs and pacs as well as inappropriate sinus tach. I've learned to accept that these aren't harmful, and I'm not afraid of them anymore. Now I'm having spells in which it feels as though my pulse gets very faint and beats very fast for a few seconds and then returns to a normal rhythm. It's almost as if my heart is clenching down. Super scary! I'be had multiple ekgs and an echo which all came back normal.