Your question is a good one without a lot of definitive answers. Basically you just have to start eliminating things one by one (caffeine, alcohol, artificial sweeteners, etc.) and see if it makes a difference or not. I've done all of these and still have not found the trigger yet. If it makes you feel better, I've been having 1000+ per day lately. :-)
easy for the doctors to say even if it's true but you MUST remain calm. i am going to be 68 and have had them all my life, just not very often. now they are occuring much more frequently and my trigger was cough medicine from january when I had persistant cough. stopped taking it end of january yet flutters/palpatations persist, sometime stopping for several days and last night going on for hours which never happened before. point is I am still here and you can't become overwrought or it will make your condition worse. accept it's going to happen and it becomes more of an annoyance than scary, try deep breathing, deep diaphram cough, hold your breath and then press down hard while sitting even dunk your head in bowl with ice and water in it to shock you back to normal. best of luck to you and remain calm.
I can relate. I've had premature beats (PVCs and PACs) on and off for the past 6 years. They suck. I hate them and I feel every single PVC. They've recently gotten so bad that they've been keeping me up at night. All night.
My PVCs seem to be related to my stomach and vagus nerve (see Roemheld Syndrome or Gastric-Cardia). I get palpitations when my vagus nerve gets irritated (e.g. gas, squeezing my stomach, a tight tank top, bending over after eating, and sometimes even just gravity). For a while there I had a way of controlling them, but now that they're significantly worse and more frequent there's not much I can do to make them go away.
There's this doctor from York Cardiology who has a bunch of videos on YouTube. They pretty much explain everything. To my understanding the way it works is that your heart is prone to misfiring and your vagus nerve sends signals to override it. When the vagus nerve gets irritated it fails to override the misfiring and premature beats happen.
Adrenaline (e.g. stress) and sleep deprivation make the heart more irritable and more likely to beat too soon. Electrolyte imbalances and structural issues can also cause this.
PVC's have a dozen triggers and a Cardiologist won't have the means to chase them down. The 30-day halter was a great idea. Your heart is fine. You will need to experiment with evertying from caffine to the position you tend to sleep in to doing research on how to control the Vagus nerve (it can be done). This is on you but you CAN do this. Do the research online. I recommend the Vagus nerve stuff first. Here's a place to start: https://www.youtube.com/watch?v=8dtPN4xrY4U
My problem is adrenaline..
I’m 24 and I get PVCs every time my HR gets above 100. Doctors guess is adrenaline. Plus it’s doesnt help that I have severe anxiety. I take a beta blocker and will only get them occasionally. I still get them though whenever I exert myself too much and get my HR above 130ish