i've had reflux and heart issues for more than a year, and had all the heart tests done. all are normal.
I get irregular beats and sometimes fast beats (100+ per min).

i don't know if it correlates with my reflux or not. It does seem worse when I'm stressed but happens even when not stressed. i was on Toprol for a while and PPIs but stopped all meds when my side effects were worse than my symptoms. I just believe that meds don't help you with what is wrong but treat the symptoms --like sweeping it under the rug.

So I live with it. And pray I don't have a heart attack when it's really bad.

p.s. i also notice it early in the morning. that's when my heart is beating irregular.
I have given up drinking coffee every day and hoping that helps. we'll see.
good luck to you.