I agree with twinbee. I have had 4 electro cardioversion, assume that's what we're talking about. Some lasted as long as 18 months, none longer. The last one lasted only 2 weeks, so we are thinking about what next, seems electro cardios don't work for me any longer. Still, I did get long periods of relief using that treatment repeatedly.
If it were me I would want to try cardioversion again. I've had several cardioversions done. In January I had an ablation done and am enjoying NSR ever since.