title: Letter by Knaapen et al regarding article, "hemodynamic effects of long-term cardiac resynchronization therapy: analysis by pressure-volume loops".
authors.forename: Paul
authors.initials: P
authors.lastname: Knaapen
authors.forename: Cornelis P
authors.initials: CP
authors.lastname: Allaart
authors.forename: Carel C
authors.initials: CC
authors.lastname: de Cock
authors.forename: Jean G F
authors.initials: JG
authors.lastname: Bronzwaer
mesh_terms: D006333:Heart Failure / Q000628:therapy*; D006339:Heart Rate; D006439:Hemodynamics / Q000502:physiology*; D006801:Humans; D013318:Stroke Volume