The general advice given to me and to all patients is that an arrhythmia rate higher than 100 BPM for more than 24 hours is a time to consider seeking urgent help. Most go to the local ER because you don't need an appointment and you'll be triaged to be seen earlier than other patients, except for those in real duress with bleeding.

I also get out of breath with little activity and have my pluse going from 50 BPM to 125+ BPM. All this with having 6, yes 6, ablations in 27 days at 2 different hospitals.