title: Transseptal catheterization for ablation in the left heart: what to do when the door is locked up tight?
authors.forename: Roberto
authors.initials: R
authors.lastname: De Ponti
mesh_terms: D001145:Arrhythmias, Cardiac / Q000000981:diagnostic imaging / Q000601:surgery*; D054087:Atrial Septum / Q000000981:diagnostic imaging / Q000601:surgery; D017115:Catheter Ablation / Q000379:methods*; D017548:Echocardiography, Transesophageal; D022062:Electrophysiologic Techniques, Cardiac; D006325:Heart Atria / Q000000981:diagnostic imaging / Q000601:surgery*; D006801:Humans