title: [Impaired coronary flow reserve in patients with non-ischemic heart failure].
abstract: OBJECTIVE
  Coronary flow reserve (CFR) is impaired not only in ischemic heart disease, but also in cardiac diseases that may or may not course with heart failure. The aim of the present study was to determine if the severity of heart failure can influence CFR impairment.
  
  
  METHODS
  Forty patients with non-ischemic heart disease and heart failure were studied 41 times. Four groups were established: 1. 10 patients in functional class III-IV; 2. 10 patients in functional class II not taking beta-blockers; 3. 11 patients in class II treated with carvedilol, and 4. 10 patients in class I. These patients had a history of heart failure and systolic dysfunction. Myocardial blood flow (MBF) was measured with positron emission tomography (PET) and N-13 ammonia at rest (r) and during adenosine triphosphate (ATP) infusion.
  
  
  RESULTS
  MBF and CFR were significantly higher in group 4 (1.95 0.58 and 2.40 0.95 ml/min/g) than in group 1 (1.02 0.52 and 1.46 0.48 ml/min/g). CFR tended to be higher in groups 2 (1.73 0.72), and 3 (1.89 0.75) vs group 1. No significant correlation was found between CFR and the following variables: age, systolic blood pressure, ventricular mass index, ventricular volume indexes, and ejection fraction.
  
  
  CONCLUSIONS
  Coronary microvascular function is impaired in non-ischemic heart failure, and the impairment is related to functional class, regardless of the underlying responsible heart disease.
authors.affiliation: Departamento de Cardiología. Clínica Universitaria de Navarra. Facultad de Medicina. Universidad de Navarra. Pamplona, Spain. icoma@unav.es
authors.forename: Isabel
authors.initials: I
authors.lastname: Coma-Canella
authors.forename: María José
authors.initials: MJ
authors.lastname: García-Velloso
authors.forename: Alfonso
authors.initials: A
authors.lastname: Macías
authors.forename: Luis
authors.initials: L
authors.lastname: Villar
authors.forename: Juan
authors.initials: J
authors.lastname: Cosín-Sales
authors.forename: Josep M
authors.initials: JM
authors.lastname: Martí-Climent
authors.forename: Miguel
authors.initials: M
authors.lastname: Artaiz
mesh_terms: D000368:Aged; D003326:Coronary Circulation / Q000502:physiology; D005260:Female; D006321:Heart / Q000000981:diagnostic imaging / Q000503:physiopathology*; D006333:Heart Failure / Q000000981:diagnostic imaging / Q000503:physiopathology*; D006439:Hemodynamics / Q000502:physiology; D006801:Humans; D008297:Male; D008875:Middle Aged; D014055:Tomography, Emission-Computed
vernacular_title: Disminución de la reserva de fluno coronario en pacientes co insuficiencia cardíaca no isquémica.