title: Pulmonary vein isolation for the treatment of atrial fibrillation in patients with impaired systolic function.
abstract: OBJECTIVE
  We aimed to determine the safety and efficacy of pulmonary vein isolation (PVI) in atrial fibrillation (AF) patients with impaired left ventricular (LV) systolic function.
  
  
  BACKGROUND
  To date, PVI has been performed primarily in patients with normal LV function. Yet, many AF patients have impaired LV systolic function. The outcomes of PVI in patients with impaired LV systolic function are unknown.
  
  
  METHODS
  We included 377 consecutive patients undergoing PVI between December 2000 and January 2003. Ninety-four patients had impaired LV function (ejection fraction [EF] <40%), and they comprised the study group. The control group was the remaining 283 patients who had a normal EF. End points included AF recurrence and changes in EF and quality of life (QoL).
  
  
  RESULTS
  Mean EF was 36% in our study group, compared with 54% in controls. After initial PVI, 73% of patients with impaired EF and 87% of patients with normal EF were free of AF recurrence at 14 +/- 6 months (p = 0.03). In the study group, there was a nonsignificant increase in EF of 4.6% and significant improvement in QoL. Complication rates were low and included a 1% risk of pulmonary vein stenosis.
  
  
  CONCLUSIONS
  Although the AF recurrence rate after initial PVI in impaired EF patients was higher than in normal EF subjects, nearly three-fourths of patients with impaired EF remained AF-free. Although our sample size was nonrandomized, our results suggest PVI may be a feasible therapeutic option in AF patients with impaired EF. Randomized studies with more patients and longer follow-up are warranted.
authors.affiliation: Center for Atrial Fibrillation, Department of Cardiovascular Medicine, Cleveland Clinic Foundation, 9500 Euclid Avenue, Cleveland, OH 44195, USA.
authors.forename: Michael S
authors.initials: MS
authors.lastname: Chen
authors.forename: Nassir F
authors.initials: NF
authors.lastname: Marrouche
authors.forename: Yaariv
authors.initials: Y
authors.lastname: Khaykin
authors.forename: A Marc
authors.initials: AM
authors.lastname: Gillinov
authors.forename: Oussama
authors.initials: O
authors.lastname: Wazni
authors.forename: David O
authors.initials: DO
authors.lastname: Martin
authors.forename: Antonio
authors.initials: A
authors.lastname: Rossillo
authors.forename: Atul
authors.initials: A
authors.lastname: Verma
authors.forename: Jennifer
authors.initials: J
authors.lastname: Cummings
authors.forename: Demet
authors.initials: D
authors.lastname: Erciyes
authors.forename: Eduardo
authors.initials: E
authors.lastname: Saad
authors.forename: Mandeep
authors.initials: M
authors.lastname: Bhargava
authors.forename: Dianna
authors.initials: D
authors.lastname: Bash
authors.forename: Robert
authors.initials: R
authors.lastname: Schweikert
authors.forename: David
authors.initials: D
authors.lastname: Burkhardt
authors.forename: Michelle
authors.initials: M
authors.lastname: Williams-Andrews
authors.forename: Alejandro
authors.initials: A
authors.lastname: Perez-Lugones
authors.forename: Ahmad
authors.initials: A
authors.lastname: Abdul-Karim
authors.forename: Walid
authors.initials: W
authors.lastname: Saliba
authors.forename: Andrea
authors.initials: A
authors.lastname: Natale
mesh_terms: D001281:Atrial Fibrillation / Q000150:complications / Q000503:physiopathology / Q000601:surgery*; D006348:Cardiac Surgical Procedures / Q000379:methods; D017115:Catheter Ablation / Q000379:methods*; D015716:Electrocardiography, Ambulatory; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D011183:Postoperative Complications; D011667:Pulmonary Veins / Q000473:pathology / Q000601:surgery*; D011788:Quality of Life; D012189:Retrospective Studies; D016896:Treatment Outcome; D014463:Ultrasonography; D018487:Ventricular Dysfunction, Left / Q000150:complications* / Q000000981:diagnostic imaging / Q000503:physiopathology