Gave myself temporary afib with pot, wore an Apple Watch for five years to confirm a hard stop resolved the afib (it eventually did after a few months with no changes in dietary/activity and I continued monitoring for five years), sold the Apple Watch. Turns out my adhd’s addiction resistance has the unfortunate downside of being able to OD on pot without noticing it. Glad to see science caught up. No confounding factors like nicotine et al, no recurrence since.