I've always believed that IST is not really treatable, perhaps a bit of bisoprolol, or, maybe it will eventually go away - not much in the way of serious help anyway. I read on the internet that bloodroot may help with palpitations. Has anyone tried this? Has anyone had any treatments that have made a difference? I can walk 10 paces and then my pulse has shot up to 130 - 140 bpm, and I'm fighting for breath. I'm not living, I'm just existing. My wonderful GP believes I'm malingering and that it's all in my head. She refuses to acknowledge that I DO NOT WANT to waste my retirement in bed - I've got many things to do and places to go. And cannot.