I have the palps, tachycardia, nearly always triggered by something I ate or drank or meds. When I get a reflux reaction it often triggers my heart - yes, via the vagus nerve. I've also had my colon trigger the heart into tachycardia when I had an abscess. The colon is connected by the vagus too.
I've worn all sorts of monitors, had lots of ECGs, nothing ever recorded except when I had a 5 hour episode and went to ER for cardioversion.
My food trigger is sulfite, but others have different triggers. I went to an experienced allergist who had seen this before and had me keep a food journal and do challenge testing.
I've posted about
this many times. Please use the search engine at the top of the page and enter keywords like food journal or challenge testing. You can also find articles that explain the reaction if you google "cardio-esophageal relfex" (not reflux) or "linked angina."
This reaction is nothing to be poo-pooed, although my gastroenterologist and cardiologist had never heard of it. I originally started searching for the cause after my reflex triggered a heart attack. I had high cholesterol and clogged arteries, but that doesn't negate the fact that there was a trigger event causing my coronary arteries to spasm. The testing I went through showed that the heart attack was not the typical clot.
Another symptom I have had is chest pain on eating or drinking anything, when my stomach has been in my chest. It can feel like a heart attack, which I had experienced. My original chest in stomach was caused by an accident where the seat belt pushed my stomach, causing a paraesophageal hiatal hernia. Since the repair I had a vomiting episode and now have the feeling back. It is not seen on any test in which I have to have my stomach empty, but is seen on CT when I am allowed to eat. I believe it's a slider now.