To make a long story short, I get tachycardia daily, usually after eating. It doesn't last too long, usually not more than 5 - 10 minutes, and I can mostly get it to stop with a valsalva pressure or by coughing. It's mostly after eating a little processed food, which contain sulfites (preservatives), to which I have found out I am sensitive. I had a heart attack 3 1/2 years ago when the tach triggered a coronary vasospasm which caused a plaque rupture.
The doc has put me on beta blockers and other heart medicines, and I don't tolerate any of them. So he just stared at me when I asked what to do about the tach episodes.
I was so disappointed that I cried all the way home.