Some thoughts. I had pretty bad arythmia and ended up in ICU twice in 2021 for a total of 14 days. Now its totally under control and here is what I did:
1) Eat very well, reducing carbs, sugar and eliminate Caffeine
2) Reduce alcohol consumption to a minimum
3) Increase Omega 3 and fibre intake to the maximum level
4) 10km of strenuous exercise EVERY single day before dawn to maintain heart rate ~95-110 bpm for 90 minutes
5) Vitamin E (400mg), C(1000mg) , D(4000IU) and 400mg Magnesium per day
6) Berberine 1500mg per day 500 every 8 hours!
7) Ensure that you consume 4500mg K and ~1200mg Na per day
8) Ensure that you drink sufficient water
9) Monitor your food intake etc with Cronometer!
Be-aware of your posture. Poor posture will cause abdominal compression and pressure on teh vagus nerve which can cause heart irregularities. Ensure that you do not have sleep aponea and if you do (exhausted during the day, waking with a very dry mouth, falling asleep at inappropriate times, difficulty waking up for getting out of bed, require a sleep in the afternoon)... resolve it. Most Sleep aponea is postural and NEVER sleep on your back.