AV Node Ablation Pros and Cons

I am scheduled for AVNode Ablation early March. Has anyone had one?
I have had 2 cardiac ablations and am on sotalol and metoprolol. I have had no afib for 9 months but continue to have intermittent episodes of tachycardia at rates in the 120's and 130's. I already have a pacemaker - since 12/22 for bradycardia probably caused by amioderone which also elevated my liver enzymes.
This is a "last resort" procedure and I am concerned that I will continue to have symptoms of afib (which AV Node ablation does not cure).
I am an almost 83 female and am otherwise in good health except for arthritis. Another question: Will having this procedure make for complications in the event I have a knee replacement.
All thoughts and experiences much appreciated!
Dalewhit