I found this site last October 2018 after getting an emergency PM for sick sinus syndrome bradycardia, but this is the first time I’ve posted. I’m so frustrated and worried because I’m having severe palpitations that feel like my heart is literally moving sideways. This is followed by dizziness, near fainting, choking feeling, and/or pins and needles. Sometimes it happens over and over for hours. My greatest fear is that I may black out while driving. I had and echo today and they checked my PM, and the cardiologist said there is nothing. Nothing in echo and nothing recorded on PM. How can this be? It has to be SOMETHING! I told her that I’m having the same symptoms that I had just before getting the PM. She said it is stress and anxiety related (which I agree with) but the symptoms are REAL. I don’t know what to do at this point. Thank you in advance for any advice.