@gregkogan AFAIK, Atrial flutter is typically results in tachycardia with rates in the 130-150 range; that's not a healthy for a heart if sustained. When I experienced it, the doctors who treated me stressed the importance of getting that rate down to normal without delay. They also said that flutter often progressed to A-fib, and gave me two options: cardioversion or ablation. I chose the ablation since it has a greater chance of correcting the condition long term than cardioversion does. Five years later I haven't regretted the decision. Good luck with yours..