I have afib and have been cardioverted once ~4 years ago. Own a kardia ekg and a regular blood pressure cuff. Coffee increases my pulse, but the waveform remains normal. Alcohol is the real killer, a very small amount like a beer will immediately show in ekg waveform abnormalities. Enough to get a buzz and it's a warzone let alone actually drunk. It's also surprising how long it lasts even into the hungover and no longer drunk zone. I'm not a doctor, but I would personally recommend to cut out all drinking with an occurrence of afib and yes, this is conjecture, but any sort of heart condition. I'm also not being sponsored by kardia and am creeped out by it storing my data presumably on the cloud.

I definitely get a skipped beat arrhythmia when I’m hung over. Noticed it in my 30s. 15 years of amphetamine use prob didn’t help. Thankfully I only drink when I’m single, so I’ve had a nice break.

Weird story: I bought a Kardia when I was having mystery arrhythmia. At its worst, a half cup of coffee would trigger it, but at that point I suspect the anxiety of getting it was also a trigger.

It was caused by a minoxidil+finasteride spray I was applying to my head for a year. It slowly got worse over time so it took me way too long to suspect it.