When would you consider AV nodal ablation in CRT-non-responders with persistent atrial fibrillation?   

AV node ablation is the most definitive method for rate control. In this scenario where the patient already has CRT and is a nonresponder, what I do next depends on age of the patient, how symptomatic the patient is, whether the rates are elevated causing the CRT pacing percentage to be suboptimal a...