title: Left ventricular-based pacing in patients with chronic heart failure: comparison of acute hemodynamic benefits according to underlying heart disease.
abstract: BACKGROUND
  Acute left ventricular-based pacing has been shown to improve hemodynamics in patients with severe heart failure and left bundle branch block (LBBB). However, it is not known whether the cause of the underlying heart disease influences the potential effect of left ventricular-based pacing.
  
  
  OBJECTIVE
  The aim of this study was to determine whether beneficial hemodynamic effects of acute left ventricular-based pacing in severe chronic heart failure are dependent on underlying heart disease.
  
  
  METHODS
  After coronary angiography, patients with severe heart failure and LBBB were separated into two groups: dilated (25 patients; 20 male) and ischemic cardiomyopathy (21 patients; 20 male). Hemodynamic parameters were evaluated at baseline and during left ventricular-based pacing.
  
  
  RESULTS
  Improvement in hemodynamic parameters were similar in both groups, during acute left ventricular pacing (changes expressed in percentage): pulmonary capillary wedge pressure, -16+/-15% vs. -14+/-10%; V wave amplitude, -25+/-18% vs. -21+/-17%; and biventricular pacing, -15+/-15% vs. -11+/-11% and -23+/-18% vs. -16+/-18%, respectively.
  
  
  CONCLUSIONS
  Underlying heart disease does not influence the response to acute left ventricular-based pacing in patients with severe heart failure and LBBB. This finding provides support for including all patients with enlarged heart and heart failure in future studies evaluating left ventricular-based pacing.
authors.affiliation: Department of Cardiology, University Hospital of, Brest, France. jacques.mansourati@univ-brest.fr
authors.forename: J
authors.initials: J
authors.lastname: Mansourati
authors.forename: Y
authors.initials: Y
authors.lastname: Etienne
authors.forename: M
authors.initials: M
authors.lastname: Gilard
authors.forename: V
authors.initials: V
authors.lastname: Valls-Bertault
authors.forename: J
authors.initials: J
authors.lastname: Boschat
authors.forename: D G
authors.initials: DG
authors.lastname: Benditt
authors.forename: K G
authors.initials: KG
authors.lastname: Lurie
authors.forename: J J
authors.initials: JJ
authors.lastname: Blanc
mesh_terms: D000368:Aged; D002037:Bundle-Branch Block / Q000503:physiopathology; D002304:Cardiac Pacing, Artificial; D002311:Cardiomyopathy, Dilated / Q000503:physiopathology*; D005260:Female; D006333:Heart Failure / Q000503:physiopathology* / Q000628:therapy*; D006352:Heart Ventricles; D006439:Hemodynamics; D006801:Humans; D008297:Male; D008875:Middle Aged; D017202:Myocardial Ischemia / Q000503:physiopathology*; D016896:Treatment Outcome