After my last knee replacement (around 2017), I was diagnosed with A-Flutter & warned it could turn into A-Fib within a few years & it did. A-Flutter was cured with a single ablation (one wire or transmitter). I was told A-Fib can be caused by one or more of 64 wires or transmitters being faulty & very difficult to correct since it's hard to tell which wire to ablate. My cardiologist was not in favor of electrophysiology but I would recommend looking into it. I believe it addresses all wires & finds the faulty one/s & ablates them while leaving all others in tact.