Reflux surgery, Nissen and such, will not cure tachycardia (racing heart).
You really must see a cardiologist about the heart symptoms, but yes, they can be related to esophagus and stomach problems.
If you get rapid heart rate after EVERYTHING you eat it's probably a physical irritation. If you can pinpoint certain foods, from keeping a food log, you could have specific food intolerances/sensitivities. That's what mostly triggersmy tachycardia.
Look up cardio-esophageal reflex (not reflUx). It's also called linked angina. There are several research papers on this, but your cardiologist and gastro doc probably haven't heard of it, and may not even consider it.
Mine got bad enough that it triggered a heart attack. After eating some cereal that triggered reflux I got tachycardia. This caused a coronary artery vasospasm which caused a plaque rupture, causing blockage of the artery - a heart attack. There are recent research articles on this also.
IF, repeat IF, that's your problem, you may need to be on blood thinners or antiarrhythmia drugs. I keep atenolol in my pocket, chew it plus an aspirin when I get new attacks, do Valsalva maneuvers to break the arrhythmia. I've also lost weight and am keeping my cholesterol under better control. I recently had an attack lasting 5 hours, went to ER where I had to have the rhythm converted. It wasn't really such a good idea to wait that long.
I've had the surgery, but only because I was in a wreck that pushed my stomach into my chest. Before that I had the condition under fairly good control by avoiding my food triggers. Once you understand the CAUSE of your condition you probably won't panic so much. I didn't panic even when I had the heart attack, just walked into the house chewed up an aspirin and dialed 911.