I've had something similar for a while, seems to be getting worse though. I've had a holter/echo, everything was fine apparently. My heart just beats unevenly all the time. It will speed up for a beat or two, then beat weak, then harder, then normal, then weak, hard, normal etc. It's extremely annoying. My resting heart rate is also low, usually 48-55. I'm the opposite of an athlete. I can't find anyone on the internet with anything similar, which is strange.
Definitely not dying from PACs. I'm sure someone else could explain it in more detail but it's basically an extra beat that originates in the atrium and causes an extremely rapid double beat, that can feel like a flutter, then usually a pause. I'm pretty sure it's impossible for anything bad to happen from a PAC.
You might not even be getting PACs, it'd have to be caught on a monitor to know for sure. PACs are not a big deal at all though.
Feel free to PM me if you ever get to the bottom of your random beats, or if you hear anything from your doctor about it. I'm pretty baffled by mine.
So what exatly is a PAC? and are we dying or what hah?
In addition what ithood said, binge drinking probably doesn't help either and make sure you get enough potassium rich foods.
Just my humble opinion, as a 48 year old man who also lived with anxiety and panic attacks, is that you should identify and treat the root cause. You are obsessing on symptoms. Where you are looking is where you will go. So what do you think the root cause is? ....if you said anxiety, then bingo. Just my humble opinion. Well perhaps not so humble. :-).