title: Pulmonary vein stenosis: still the Achilles heel of ablation for atrial fibrillation?
authors.forename: Helmut
authors.initials: H
authors.lastname: Pürerfellner
mesh_terms: D001281:Atrial Fibrillation / Q000601:surgery*; D017115:Catheter Ablation / Q000009:adverse effects*; D003251:Constriction, Pathologic / Q000209:etiology; D006801:Humans; D011667:Pulmonary Veins