title: [Characteristics of heart failure with preserved ejection fraction: results of the Chilean national registry of heart failure, ICARO].
abstract: BACKGROUND
  Heart failure (HF) with preserved ejection fraction (EF) is a condition of growing interest due to its high prevalence and difficult management.
  
  
  OBJECTIVE
  To evaluate the clinical profile of patients hospitalized with HF and preserved EF in Chilean hospitals.
  
  
  METHODS
  Prospective registry of 15 centers. Among 649 patients hospitalized in functional class III and IV, an echocardiogram was performed to 353. Preserved EF was defined quantitatively as an EF >50%.
  
  
  RESULTS
  Out the 353 patients, 45% presented an EF >50%. Mean age in patients with EF >50 and -50% was 66+/-13 and 67+/-13 years, respectively. Among patients with HF and EF >50%, the proportion of women was higher (73.7 and 36.3%, p <0.001), the proportion of patients with a history of hypertension (76.8 and 65.5%, p <0.05) and the presence of atrial fibrillation was also higher (62.3 and 47.8%, p <0.01) and a history of myocardial infarction was lower (17.1 and 29.5%, p <0.05). The diastolic diameter of the left ventricle was significantly lower in HF with preserved EF (51.0+10 and 63.5+10 mm respectively, p <0.001). No differences in the length of hospital stay and mortality were observed between HF with depressed and preserved EF. Female gender was an independent predictor for the presence of HF with preserved EF (Odds ratio: 2.62; confidence intervals: 1.1-6.1).
  
  
  CONCLUSIONS
  HF and preserved EF is common among hospitalized patients, particularly in women and subjects with a history of hypertension and atrial fibrillation. Hospitalization length and mortality were similar in patients with either preserved or depressed EF.
authors.affiliation: Registro Nacional de Insuficiencia Cardíaca, Departamento de Estudios Multicéntricos, Sociedad Chilena de Cardiología y Cirugía Cardiovascular, Santiago, Chile. jvukasovic@med.uchile.cl
authors.forename: José Luis
authors.initials: JL
authors.lastname: Vukasovic R
authors.forename: Pablo
authors.initials: P
authors.lastname: Castro G
authors.forename: Luis
authors.initials: L
authors.lastname: Sepúlveda M
authors.forename: Carolina
authors.initials: C
authors.lastname: Nazzal N
authors.forename: Eduardo
authors.initials: E
authors.lastname: Garcés F
authors.forename: Roberto
authors.initials: R
authors.lastname: Concepción Ch
authors.forename: Juan Ramón
authors.initials: JR
authors.lastname: Soto S
authors.forename: Patricio
authors.initials: P
authors.lastname: Yovaniniz L
authors.forename: Marcela
authors.initials: M
authors.lastname: Ferrada K
authors.forename: Gabriel
authors.initials: G
authors.lastname: Cavada Ch
mesh_terms: D000368:Aged; D000369:Aged, 80 and over; D002677:Chile / Q000453:epidemiology; D015150:Echocardiography, Doppler; D004812:Epidemiologic Methods; D005260:Female; D006333:Heart Failure / Q000453:epidemiology / Q000209:etiology / Q000503:physiopathology; D006760:Hospitalization; D006801:Humans; D006973:Hypertension / Q000150:complications / Q000453:epidemiology / Q000503:physiopathology; D008297:Male; D008875:Middle Aged; D017678:Sex Distribution; D013318:Stroke Volume / Q000502:physiology