...like some of the others have told you, I've had a left sinus arrhythmia that
results in missed beats for my entire adult life. I'm 65, and so long as I stay in
reasonable physical condition, they are minimal.

It's not a big deal for me, and would be foolish for me to worry about it.

There are a lot of causes for arrhythmias, some less benign, so if it's intermittent and
does not repeat during an EKG, they have a monitor thingy you can borrow and wear for
a week, and when you feel it happening, you punch a button and it records you.

I forget the name, but your doctor's office will know it.