Not sure if your condition is similar to what I went through. I was trying to quit Omeprazole, which is "impossible" as many have said, but I finally managed to stop taking Omeprazole. As a result, I was getting heartburns (ofc), pulsating body and heart (feels like it's racing but it's just a lot of heavy thumping) and I felt like my blood pressure was getting high as I was getting a little woozy.

I've been taking probiotics for a while then out of the blue, I saw the prebiotics (Saccharomyces Boulardii) bottle sitting in my refrigerator. I was like, yeah fk it, let's give that a try. After a week, my heartburn went away, the racing/pulsating sensation went away and my blood pressure felt back to normal as I wasn't feeling woozy anymore.

It could be a GI issue for you, not a heart issue. When I have heartburn, my heart beats fast. Obviously I need a change in my diet, but I got it managed with both probiotics and prebiotics.

Additionally, you can try u/JohnTitor17's Vit C and Lysine protocol, that worked well for me, which got everything under control, which is why I tried quitting omeprazole soon after my BP stabilized to a great degree.