title: Ablation for persistent atrial fibrillation: do we know who to turn away?
authors.forename: David D
authors.initials: DD
authors.lastname: Spragg
authors.forename: Hugh
authors.initials: H
authors.lastname: Calkins
mesh_terms: D001281:Atrial Fibrillation / Q000601:surgery*; D017115:Catheter Ablation; D006325:Heart Atria / Q000000981:diagnostic imaging; D006801:Humans; D018579:Patient Selection; D011183:Postoperative Complications; D011237:Predictive Value of Tests; D055502:Secondary Prevention; D014463:Ultrasonography