Thank you so much for the thoughts and I too hope you get your answers soon! I was prescribed Xanax but unfortunately it made all of my symptoms worse. Since my heart rate either stays the same or actually goes down during the worst of the attacks, it doesn’t appear to be anxiety so it makes some sense the Xanax wouldn’t help. I don’t react well to most medications and never request anything, but am going to ask for an antidepressant to see if that can help some. I have some doubts…. My primary is also baffled. But I’m lucky to have a wonderful wife who keeps pushing when I am ready to just give up, and she’s kept putting pressure on the docs. It was a real gut punch when Mayo rejected our doctor’s referral as we had put so much hope in them getting to the bottom of this but maybe the local docs can find something soon and all will be well. Good luck and I hope you find your answers. I understand how incredibly difficult it can be to deal with a life altering illness without any answers or treatment on the horizon, but I truly hope they can get you going in the right direction and back to good health!