Hi Pam - Once I developed Afib long ago, my experience was that dental anesthesia that contained epinephrine did cause ectopics and sometimes, Afib. After that, if I needed numbing, I always requested w/o the epi. It's on my chart.
No problems after that, but I also rarely have dental issues that require anesthesia.
LaniB's suggestion to try L-theanine or GABA is what I use if I'm facing something that is likely to be stressful and I always find it helpful.
Jackie