title: Continuous flow left ventricular assist device improves functional capacity and quality of life of advanced heart failure patients.
abstract: OBJECTIVE
  This study sought to assess the impact of continuous flow left ventricular assist devices (LVADs) on functional capacity and heart failure-related quality of life.
  
  
  BACKGROUND
  Newer continuous-flow LVAD are smaller and quieter than pulsatile-flow LVADs.
  
  
  METHODS
  Data from advanced heart failure patients enrolled in the HeartMate II LVAD (Thoratec Corporation, Pleasanton, California) bridge to transplantation (BTT) (n = 281) and destination therapy (DT) (n = 374) trials were analyzed. Functional status (New York Heart Association [NYHA] functional class, 6-min walk distance, patient activity scores), and quality of life (Minnesota Living With Heart Failure [MLWHF] and Kansas City Cardiomyopathy Questionnaires [KCCQ]) were collected before and after LVAD implantation.
  
  
  RESULTS
  Compared with baseline, LVAD patients demonstrated early and sustained improvements in functional status and quality of life. Most patients had NYHA functional class IV symptoms at baseline. Following implant, 82% (BTT) and 80% (DT) of patients at 6 months and 79% (DT) at 24 months improved to NYHA functional class I or II. Mean 6-min walk distance in DT patients was 204 m in patients able to ambulate at baseline, which improved to 350 and 360 m at 6 and 24 months. There were also significant and sustained improvements from baseline in both BTT and DT patients in median MLWHF scores (by 40 and 42 U in DT patients, or 52% and 55%, at 6 and 24 months, respectively), and KCCQ overall summary scores (by 39 and 41 U, or 170% and 178%).
  
  
  CONCLUSIONS
  Use of a continuous flow LVAD in advanced heart failure patients results in clinically relevant improvements in functional capacity and heart failure-related quality of life.
authors.affiliation: Duke University Medical Center, Durham, NC 27710, USA. joseph.rogers@duke.edu
authors.forename: Joseph G
authors.initials: JG
authors.lastname: Rogers
authors.forename: Keith D
authors.initials: KD
authors.lastname: Aaronson
authors.forename: Andrew J
authors.initials: AJ
authors.lastname: Boyle
authors.forename: Stuart D
authors.initials: SD
authors.lastname: Russell
authors.forename: Carmelo A
authors.initials: CA
authors.lastname: Milano
authors.forename: Francis D
authors.initials: FD
authors.lastname: Pagani
authors.forename: Brooks S
authors.initials: BS
authors.lastname: Edwards
authors.forename: Soon
authors.initials: S
authors.lastname: Park
authors.forename: Ranjit
authors.initials: R
authors.lastname: John
authors.forename: John V
authors.initials: JV
authors.lastname: Conte
authors.forename: David J
authors.initials: DJ
authors.lastname: Farrar
authors.forename: Mark S
authors.initials: MS
authors.lastname: Slaughter
mesh_terms: D004867:Equipment Design; D005260:Female; D006333:Heart Failure / Q000503:physiopathology / Q000628:therapy*; D006352:Heart Ventricles; D006353:Heart-Assist Devices; D006801:Humans; D008297:Male; D008875:Middle Aged; D011788:Quality of Life; D011795:Surveys and Questionnaires; D016138:Walking / Q000502:physiology