Proven isolation of the pulmonary vein antrum with or without left atrial posterior wall isolation in patients with persistent atrial fibrillation

Rong Bai, Luigi Di Biase, Prasant Mohanty, Chintan Trivedi, Antonio Dello Russo, Sakis Themistoclakis, Michela Casella, Pietro Santarelli, Gaetano Fassini, Pasquale Santangeli, Sanghamitra Mohanty, Antonio Rossillo, Gemma Pelargonio, Rodney Horton, Javier Sanchez, Joseph Gallinghouse, J. David Burkhardt, Chang-Sheng Ma, Claudio Tondo, Andrea Natale

Risultato della ricerca: Contributo in rivistaArticolo in rivista

90 Citazioni (Scopus)


Background It is unclear whether isolation of the left atrial posterior wall (LAPW) offers additional benefits over pulmonary vein antrum isolation (PVAI) alone in patients with persistent atrial fibrillation (AF). Objective We sought to determine the impact of PVAI and LAPW isolation (PVAI+LAPW) versus PVAI alone on the outcome of ablation of persistent AF. Methods During the first procedure, PVAI was performed in 20 patients (group 1), whereas in 32 patients (group 2), PVAI was extended to the left atrial (LA) septum and coronary sinus (CS), and isolation of the LAPW was targeted (ePVAI+LAPW). Isolation of the superior vena cava was achieved in both groups. All patients, regardless of arrhythmia recurrence, underwent a second procedure 3 months after the first procedure. In patients with reconnection of pulmonary veins or LAPW, reisolation was performed, and a third procedure was performed 3 months later to verify isolation. Patients entered follow-up only after PVAI (group 1) or PVAI+LAPW (group 2) isolation was proven. Results At the 1-, 2-, and 3-year follow-up examinations, the rates of freedom from atrial tachyarrhythmia without use of an antiarrhythmic drug were 20%, 15%, and 10% in group 1 and 65%, 50%, and 40% in group 2, respectively (log-rank P <.001). The median recurrence-free survival time was 8.5 months (interquartile range 6.5-11.0) in group 1 and 28.0 months (interquartile range 8.5-32.0) in group 2. Conclusion Proven isolation of the LAPW provides additional benefits over PVAI alone in the treatment of persistent AF and improves procedural outcome at follow-up. However, the ablation strategy of ePVAI+LAPW is still associated with a significant high incidence of very late recurrence of atrial tachyarrhythmia. Clinical Trial Registration "Outcome of Atrial Fibrillation Ablation After Permanent Pulmonary Vein Antrum Isolation With or Without Proven Left Atrial Posterior Wall Isolation" (LIBERATION). Identifier: NCT01660100.
Lingua originaleEnglish
pagine (da-a)132-140
Numero di pagine9
RivistaHeart Rhythm
Stato di pubblicazionePubblicato - 2016


  • Aged
  • Atrial Fibrillation
  • Atrial fibrillation
  • Catheter Ablation
  • Catheter ablation
  • Echocardiography, Transesophageal
  • Electrocardiography, Ambulatory
  • Female
  • Follow-Up Studies
  • Heart Atria
  • Humans
  • Left atrial posterior wall
  • Male
  • Middle Aged
  • Postoperative Complications
  • Pulmonary Veins
  • Pulmonary vein antrum isolation
  • Secondary Prevention
  • Treatment Outcome


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