Update: My friend sent an article saying that even a tiny weight loss could stop A/Fib. Another possibility is that Cardioversion started working. Also, I was prescribed Eliquis & Metaprolol, so maybe that started working; who knows? Again, I didn't try losing weight; it just happened, so perhaps something else is happening. I'll be 82 next month, and I'm thrilled to be alive, but I'm shocked, too!