Utilidad de la interleukina-6 y de la proteína C reactiva ultrasensible como marcadores pronósticos en pacientes ambulatorios con insuficiencia cardíaca y fracción de eyección reducida

Purpose: The aim of this study was to assess whether interleukin-6 (IL-6) and high-sensitivity C-reactive protein (hsCRP)associated with B-type natriuretic peptide (BNP) are independent markers of adverse events in outpatients with heart failureand reduced ejection fraction (HFrEF).Methods: Patients older than 65 years of age with HFrEF who were followed-up on an outpatient basis were prospectivelyincluded. Baseline BNP, IL-6 and hsCRP levels were assessed. Patients with HF after recent myocardial infarction (7.2 pg/ml) were independent predictors of the primary endpoint [HR 2.60 (95% CI1.14-5.9), p=0.02 and HR 2.49 (95% CI 1.08-5.7), p=0.03, respectively], but not hsCRP >6.9 mg/l, p=0.2. IL-6 presented anarea under the ROC curve (AUC) of 0.70, BNP 0.73 and hsPCR 0.63, without significant differences between them.Conclusions: BNP and IL-6 were independent markers of the composite endpoint, but not CRP. The discrimination ability ofIL-6 and BNP was moderate. Objetivo. Evaluar si la Interleukina-6 (IL-6) y la Porteína C Reactiva ultrasensible (PCRus) asociadas al Péptido Natriurético tipo B (BNP) son marcadores independientes de eventos en pacientes ambulatorios con Insuficiencia cardíaca con fracción de eyección reducida (IC-FEr).Materiales y MétodosSe incluyeron en forma prospectiva pacientes mayores de 65 años con IC-FEr que se siguen en forma ambulatoria. Se realizó medición basal de BNP, IL-6 y PCR-us. Se excluyeron los pacientes con IC post infarto de miocardio reciente (< 6 meses), con internación reciente (442) y la IL