I had problems with heartbeat being irregular etc for years. I read in a news column of a doctor that some people are EXTREMELY sensitive to caffeine. LONG story short, I quit the coffee and drinks with caffeine and rarely had even a minor problem for YEARS.
Now age 75 and live in Costa Rica, the past few months I started having problems again. It was real bad about a week ago. It occurred to me that I had been eating Haagen Daz COFFEE oce cream from the US. BINGO!
A SMALL amount affects me.
Instead of creepy medicines and procedures, STOP deinking ANYTHING with caffeine. Coffee, colas, Mountain Dew, chocolate. I LOVE all those things, but I HATE meds, docs and hospitals and horrible symptoms. DO IT. I would bet your heart problems go out the window.