It definitely isn't heart racing, it's the opposite I get. I used to have a sudden brief heart beat slow down at random moments. Years ago I looked it up, found loads of people online had same thing. It had a special name, was considered harmless, just annoying. But now it's changed, more like shakes with slightly pounding heart but no change in number of heart beats. Which Now I can definitely tie it to caffeine & alcohol.
So I think it now counts as a kind of palpitation, because of the pounding feeling of the individual beats, right?
I suppose I will go double check with GP, though I expect it to be wasted errand at best. Even if they send me for tests they won't find anything. Or GP will be unalarmed, shrug if I say it's an occasional slow down & just tell me to experiment to figure out how to manage it. Or simply instruct me to stop all caffeine & alcohol (fair enough, but boo hoo).
Any experience or expertise still appreciated. Forms of caffeine sensitivity are rampant in my family so this all comes as no surprise, but still annoying.