I had catheter ablation for both a fib and a flutter five years ago. I’m now 68.. sVT’s are quite common after ablations. I still get some today but realistically, according to my wife, who is a specialist and ran the AFib clinic here in Vancouver at VGH she said there is a probability of getting a fib again as the heart always finds new pathways and not always the ones you want regardless I’m on my peloton bike every single day. I’m pushing my heart rate to the max at times and haven’t managed to get into any regular rhythm other than SVTs, which are fairly harmless but unnerving and I’m sure you’ll agree after having had flutter, it’s incredibly unnerving but harmless unless it goes on for days good luck Frontier X has been instrumental and measuring my rhythms, and I also use a Kardia device which are inexpensive and allow you to narrow it down whenever you feel like you rather rhythm but typically it’s just a faster rate than you might be used to and your nervous. One last bit of advice if you drink alcohol and I no longer do it’s the single biggest trigger for irregular heart rates most people don’t want to admit to it, but I guarantee it. It’ll put you in the ER for a conversion pretty quickly.