I am hoping someone has experienced something similar so to explain what is occurring, as my doctors are at a loss. I had my pm surgery on Sept 12, 2019. I’m 62 yr old female, with Brady-tachy. PM is set to 60 with rate response, I’m on no heart medications. About 2 monthe ago, I was at my low impact Zumba class when I experienced a tremendous, excruciating pain on the left side of my chest. Pain was so strong, that it took my breathe away. After a few minutes of rest and water, the pain subsided. I called my doctor and he scheduled a pm check, which turned up nothing. No event was recorded, pm was in perfect working order. I was given the clear to go back to Zumba, which I did. A few weeks later, it happened again, this time, not so intense, since I had been cautious because of the previous event. Again, I called the doctor, he then scheduled a stress test, which I passed with flying colors. Again, the doctor has no ideas and we continue to try to find some correlation with the exercising and the pain. Some of you suggested maybe it was related to sound vibration, nope, doesn’t seem to make a difference. It has only happened during this particular exercise class, and usually about 12 minutes into the class. I’m thinking it may be related to left arm movement. The pain seems to start about 1 inch to the right of the PM toward center of chest, and it is an intense pain that radiates in all directions until I stop moving. I’ve tried to ignore the pain, and work through it, since the doctors said my heart was fine, but the pain didn’t agree. After the event, there is no residual pain or tenderness. It only happens during this class. It only happens once during this class even though I continue exercising for another 30 minutes after it happens and It doesn’t happen every class. Does anyone have any ideas as what it could be?