Atrial Fibrillation - what to do?

I am a 51 year old 345lb. male with AF. My first occurrence was about two years ago. Electrical Cardioversion restored me to a normal rythym.

In April of this year the condition returned. This time the Electrical Cardioversion failed. Now I am stuck on 200mg Toprol, .25mcg Digoxin, Micardis HCT 80/25 and of course Warafin 5mg.

Is there any hope in future attempts at Electrical Cardioversion, or should I just opt for Radio Frequency Ablation?

Has anyone benefited from Electrical Cardioversion after prior attempts have failed?

Any advice would be appreciated.

Thanks,

James
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