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ENGLISH ABSTRACT
JOURNAL ARTICLE
[Clinical determinants and prognostic value of hemoglobin in hospitalized patients with systolic heart failure].
Revista Española de Cardiología 2007 June
INTRODUCTION AND OBJECTIVES: Anemia is a common finding in outpatients with heart failure (HF) and is associated with increased mortality. The aims of this study were to identify determinants of the hemoglobin level in a large group of hospitalized patients with systolic HF and to investigate the medium-term prognostic value of the hemoglobin level.
METHODS: The study included 460 consecutive patients (age 68.3 [12.3] years, 74% male) who were hospitalized with a diagnosis of HF and left ventricular systolic dysfunction (i.e., a left ventricular ejection fraction <45%). At hospital discharge, biochemical and hematological parameters were measured and clinical and echocardiographic variables were recorded. Patients were followed up for 16.8[9.7] months.
RESULTS: Anemia, as defined by World Health Organization criteria, was present in 189 (41.1%) patients. The following independent determinants of the hemoglobin level were identified: age (relative risk [RR]=1.035, 95% CI, 1.011-1.060; P=.004), female sex (RR=1.843, 95% CI, 1.083-3.135; P=.024), diabetes mellitus (RR=1.413, 95% CI, 1.087-1.838; P=.010), plasma urea level (RR=1.013, 95% CI, 1.005-1.022; P=.001), and loop diuretic use (RR=2.801, 95% CI, 1.463-5.364; P=.002). A decrease in hemoglobin level was associated with increased risks of death (RR per g/dL=1.232, 95% CI, 1.103-1.375; P<.001) and death or HF readmission (RR per g/dL=1.152, 95% CI, 1.058-1.255; P<.001), but not with readmission for non-fatal HF (RR per g/dL=1.081, 95% CI, 0.962-1.215; P=.265). Blood transfusion during hospitalization did not alter the increased risk of death (RR=2.19, 95% CI 1.40-3.41; P=.001).
CONCLUSIONS: In hospitalized patients with systolic HF, the hemoglobin level at hospital discharge was an independent predictor of death in the medium term, but not of readmission for non-fatal HF. The main determinants of the hemoglobin level were age, sex, renal function, diabetes, and the need for diuretics.
METHODS: The study included 460 consecutive patients (age 68.3 [12.3] years, 74% male) who were hospitalized with a diagnosis of HF and left ventricular systolic dysfunction (i.e., a left ventricular ejection fraction <45%). At hospital discharge, biochemical and hematological parameters were measured and clinical and echocardiographic variables were recorded. Patients were followed up for 16.8[9.7] months.
RESULTS: Anemia, as defined by World Health Organization criteria, was present in 189 (41.1%) patients. The following independent determinants of the hemoglobin level were identified: age (relative risk [RR]=1.035, 95% CI, 1.011-1.060; P=.004), female sex (RR=1.843, 95% CI, 1.083-3.135; P=.024), diabetes mellitus (RR=1.413, 95% CI, 1.087-1.838; P=.010), plasma urea level (RR=1.013, 95% CI, 1.005-1.022; P=.001), and loop diuretic use (RR=2.801, 95% CI, 1.463-5.364; P=.002). A decrease in hemoglobin level was associated with increased risks of death (RR per g/dL=1.232, 95% CI, 1.103-1.375; P<.001) and death or HF readmission (RR per g/dL=1.152, 95% CI, 1.058-1.255; P<.001), but not with readmission for non-fatal HF (RR per g/dL=1.081, 95% CI, 0.962-1.215; P=.265). Blood transfusion during hospitalization did not alter the increased risk of death (RR=2.19, 95% CI 1.40-3.41; P=.001).
CONCLUSIONS: In hospitalized patients with systolic HF, the hemoglobin level at hospital discharge was an independent predictor of death in the medium term, but not of readmission for non-fatal HF. The main determinants of the hemoglobin level were age, sex, renal function, diabetes, and the need for diuretics.
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