@makial This is common, so it's not off the wall....if you follow. The pacemaker will help to keep your left ventricle from trying to keep pace with the atrium above it, on the other side of the mitral valve. The upper atrium is beating erratically. The ventricle is picking up the same signal, and has what is called as 'rapid ventricular rate' or 'rapid ventricular response' depending on the team looking after you. However, a pacemaker doesn't always stop the fibrillation. You need to be clear about yes or no from the next meeting with your EP.

The two ablations failed because the EP was being conservative and didn't want to ablate more tissue surfaces inside your left atrium....I think......I hope. If he was not very skilled, that also may account for those very unfortunate failures....and believe me, I feel for you.

You would be wise, I think, and I advise, to seek a highly experienced EP some distance from you who specializes in complex cases of arrhythmia. There are many dozens of excellent EPs in the USA who do this more complex surgery. One is Dr. Andrea Natale at Texas Cardia Arrhythmia Institute in Austin, TX. Another is Dr. Pasquale Santangeli at Cleveland Clinic. Or, Luigi Di Biase, MD, PhD
Albert Einstein College of Medicine at Montefiore Hospital
New York.