I have a similar problem but control it with Calcium channel blockers since I have mild high blood pressure.

Given my blood pressure issue (which is basically part of my family genetic makeup) , I need to be on meds no matter what, hence I did not have the ablation done.

My neighbor tried Beta Blockers and it seriously messed up his riding, he has since switched to Calcium channel blockers and is back riding again.

I have been on them about 9 months now and can hit 175 MHR again (51 years old) without fear of redlining my heart rate. No side affects and feel great.

Good luck.