ECG - differences

I captured one from last year and one from last night. The differences are apparent. I need to do some more research on why the more current one is different. I’m hopeful that it’s a case where the Afib and pacemaker are battling. The PM when it detects Afib goes into a mode where it attempts to adjust for the Afib. It doesn’t correct the condition though. I hope it’s got nothing to do with the AV node being the problem. If they zap that with an ablation then I’m dependent upon the PM to sustain the beat. Perhaps the end of the road is near.