The below article may be of interest. Point is improved procedures are being developed. If link does not work I can copy and paste though article is fairly long. EP's from across the globe attended this conference.
statesman.com/story/news/he...
ADMire Ablation technique is a new procedure being tested in the US with expected FDA approval in 2024. (excerpts)
The AdmIRE system emits a pulse that is a millisecond long and is tuned to the specific makeup of cardiac tissue. "Really the major benefit is the collateral damage. We can prevent it," Natale said.
This technique also doesn't cause inflammation, which is seen in standard ablation techniques, he said.
Natale started the June 2 procedure by using a catheter to get the lasso up to the heart and then using the lasso to map the heart. The system studies which areas needed to be ablated based on the density of the area. He's also able to watch the rhythms of the heart as it responds to the ablation.
The first time the lasso emits the pulse, the heart's irregular rhythm vanishes, but they do the pulse three times to make sure it does not return to that area.
Natale predicts that as this new technology is used, doctors will figure out how many times they need to ablate the same area. It's possible three is not needed, but this is the clinical trial protocol and what was determined from previous preclinical testing on animals.
Ablation
Question concerning a second ablation
PVCs, PAF and ablation 
Ablation it is then...
