title: Efficacy, safety, and outcomes of catheter ablation of atrial fibrillation in patients with heart failure with preserved ejection fraction.
abstract: OBJECTIVE
  This study sought to investigate the efficacy and safety of catheter ablation for atrial fibrillation (AF) in patients with heart failure with preserved ejection fraction (HFPEF).
  
  
  BACKGROUND
  AF is a precipitating factor for clinical deterioration of HFPEF.
  
  
  METHODS
  Catheter ablation for AF was performed in a consecutive 74 patients with compensated HFPEF (left ventricular [LV] ejection fraction >50%). AF-free probability after catheter ablation and factors relating to maintenance of sinus rhythm were investigated. LV strain and strain rate were assessed by echocardiography at baseline and over 12 months after ablation.
  
  
  RESULTS
  During a 34 ± 16-month follow-up period, single- and multiple-procedure drug-free success rates were 27% (n = 20) and 45% (n = 33), respectively. Multiple procedures and pharmaceutically assisted success rate was 73% (n = 54). No major complications occurred during follow-up. Multivariate Cox regression analyses revealed that AF type (other than long-standing persistent AF) and lack of hypertension were independently associated with maintenance of sinus rhythm (hazard ratio [HR]: 1.81, 95% confidence interval [CI]: 1.03 to 3.17, p = 0.04; HR: 0.49, 95% CI: 0.24 to 0.96, p = 0.04, respectively). LV systolic indices (LV ejection fraction, LV strain/strain rate at systole) and diastolic indices (E/E', ratio of LV strain rate at diastole with early transmitral flow) were improved only in patients maintaining sinus rhythm at follow-up.
  
  
  CONCLUSIONS
  Our results suggest that AF can be effectively and safely treated with a composite of repeat procedures and pharmaceuticals in patients with HFPEF. However, the current study was a single-arm analysis; therefore, larger randomized control studies are needed to verify the benefit of AF ablation in this cohort.
authors.affiliation: Cardiovascular Division, Faculty of Medicine, University of Tsukuba, Tsukuba, Japan.
authors.forename: Tomoko
authors.initials: T
authors.lastname: Machino-Ohtsuka
authors.forename: Yoshihiro
authors.initials: Y
authors.lastname: Seo
authors.forename: Tomoko
authors.initials: T
authors.lastname: Ishizu
authors.forename: Akinori
authors.initials: A
authors.lastname: Sugano
authors.forename: Akiko
authors.initials: A
authors.lastname: Atsumi
authors.forename: Masayoshi
authors.initials: M
authors.lastname: Yamamoto
authors.forename: Ryo
authors.initials: R
authors.lastname: Kawamura
authors.forename: Takeshi
authors.initials: T
authors.lastname: Machino
authors.forename: Kenji
authors.initials: K
authors.lastname: Kuroki
authors.forename: Hiro
authors.initials: H
authors.lastname: Yamasaki
authors.forename: Miyako
authors.initials: M
authors.lastname: Igarashi
authors.forename: Yukio
authors.initials: Y
authors.lastname: Sekiguchi
authors.forename: Kazutaka
authors.initials: K
authors.lastname: Aonuma
mesh_terms: D000368:Aged; D001281:Atrial Fibrillation / Q000150:complications / Q000601:surgery*; D017115:Catheter Ablation; D004452:Echocardiography; D005260:Female; D006333:Heart Failure / Q000150:complications* / Q000000981:diagnostic imaging; D006801:Humans; D008297:Male; D008875:Middle Aged; D015203:Reproducibility of Results; D013318:Stroke Volume; D016896:Treatment Outcome
keywords: 2DSTE; AF; CA; CI; HFPEF; HR; LA; LV; LVEF; SI(SYS); SR; SR(E); SR(IVR); SR(SYS); atrial fibrillation; catheter ablation; confidence interval; echocardiography; hazard ratio; heart failure; heart failure with preserved ejection fraction; left atrial/left atrium; left ventricular ejection fraction; left ventricular/left ventricle; longitudinal left ventricular peak strain at systole; longitudinal left ventricular peak strain rate at early diastole; longitudinal left ventricular peak strain rate at systole; longitudinal left ventricular peak strain rate during isovolumetric relaxation period; sinus rhythm; two-dimensional speckle tracking echocardiography