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      Effects of intravenous iron therapy in iron-deficient patients with systolic heart failure: a meta-analysis of randomized controlled trials.

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          The aim of this study was to assess the net clinical and prognostic effects of intravenous (i.v.) iron therapy in patients with systolic heart failure (HF) and iron deficiency (ID).

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          Most cited references 24

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          Heart failure: preventing disease and death worldwide

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            Anemia and mortality in heart failure patients a systematic review and meta-analysis.

            The aim of this study was to assess the effect of anemia on mortality in chronic heart failure (CHF). Anemia is frequently observed in patients with CHF, and evidence suggests that anemia might be associated with an increased mortality. A systematic literature search in MEDLINE (through November 2007) for English language articles was performed. In addition, a manual search was performed. We included cohort studies and retrospective secondary analyses of randomized controlled trials whose primary objective was to analyze the association between anemia and mortality in CHF. Of a total of 1,327 initial studies, we included 34 studies, comprising 153,180 patients. Information on study design, patient characteristics, outcome, and potential confounders were extracted. Anemia was defined by criteria used in the original articles. Of the 153,180 CHF patients, 37.2% were anemic. After a minimal follow-up of 6 months, 46.8% of anemic patients died compared with 29.5% of nonanemic patients. Crude mortality risk of anemia was odds ratio 1.96 (95% confidence interval: 1.74 to 2.21, p < 0.001). Lower baseline hemoglobin values were associated with increased crude mortality rates (r = -0.396, p = 0.025). Adjusted hazard ratios showed an increased adjusted risk for anemia (hazard ratio 1.46 [95% confidence interval: 1.26 to 1.69, p < 0.001]). Subgroup analysis showed no significant difference between mortality risk of anemia in diastolic or systolic CHF. Anemia is associated with an increased risk of mortality in both systolic and diastolic CHF. Anemia should, therefore, be considered as a useful prognosticator, and therapeutic strategies aimed to increase hemoglobin levels in CHF should be investigated.
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              Effect of intravenous iron sucrose on exercise tolerance in anemic and nonanemic patients with symptomatic chronic heart failure and iron deficiency FERRIC-HF: a randomized, controlled, observer-blinded trial.

              We tested the hypothesis that intravenous iron improves exercise tolerance in anemic and nonanemic patients with symptomatic chronic heart failure (CHF) and iron deficiency. Anemia is common in heart failure. Iron metabolism is disturbed, and administration of iron might improve both symptoms and exercise tolerance. We randomized 35 patients with CHF (age 64 +/- 13 years, peak oxygen consumption [pVO2] 14.0 +/- 2.7 ml/kg/min) to 16 weeks of intravenous iron (200 mg weekly until ferritin >500 ng/ml, 200 mg monthly thereafter) or no treatment in a 2:1 ratio. Ferritin was required to be <100 ng/ml or ferritin 100 to 300 ng/ml with transferrin saturation <20%. Patients were stratified according to hemoglobin levels (<12.5 g/dl [anemic group] vs. 12.5 to 14.5 g/dl [nonanemic group]). The observer-blinded primary end point was the change in absolute pVO2. The difference (95% confidence interval [CI]) in the mean changes from baseline to end of study between the iron and control groups was 273 (151 to 396) ng/ml for ferritin (p < 0.0001), 0.1 (-0.8 to 0.9) g/dl for hemoglobin (p = 0.9), 96 (-12 to 205) ml/min for absolute pVO2 (p = 0.08), 2.2 (0.5 to 4.0) ml/kg/min for pVO2/kg (p = 0.01), 60 (-6 to 126) s for treadmill exercise duration (p = 0.08), -0.6 (-0.9 to -0.2) for New York Heart Association (NYHA) functional class (p = 0.007), and 1.7 (0.7 to 2.6) for patient global assessment (p = 0.002). In anemic patients (n = 18), the difference (95% CI) was 204 (31 to 378) ml/min for absolute pVO2 (p = 0.02), and 3.9 (1.1 to 6.8) ml/kg/min for pVO2/kg (p = 0.01). In nonanemic patients, NYHA functional class improved (p = 0.06). Adverse events were similar. Intravenous iron loading improved exercise capacity and symptoms in patients with CHF and evidence of abnormal iron metabolism. Benefits were more evident in anemic patients. (Effect of Intravenous Ferrous Sucrose on Exercise Capacity in Chronic Heart Failure;; NCT00125996).

                Author and article information

                Eur. J. Heart Fail.
                European journal of heart failure
                Jul 2016
                : 18
                : 7
                [1 ] Laboratory for Applied Research on Cardiovascular System, Department of Heart Diseases, Wroclaw Medical University, Wroclaw, Poland.
                [2 ] Cardiology Department, Centre for Heart Diseases, Military Hospital, Wroclaw, Poland.
                [3 ] Biostatistics Group, Department of Genetics, Wroclaw University of Environmental and Life Sciences, Wroclaw, Poland.
                [4 ] Division of Innovative Clinical Trials, Department of Cardiology & Pulmonology, University Medicine Göttingen (UMG), Göttingen, Germany.
                [5 ] Department of Cardiology, Virchow Klinikum, Charite - Universitätsmedizin, Berlin, Germany.
                [6 ] Center for Stroke Research Berlin, Charite - Universitätsmedizin, Berlin, Germany.
                [7 ] Heart Failure Unit, Department of Cardiology, Athens University Hospital Attikon, Athens, Greece.
                [8 ] Department of Heart Diseases, Wroclaw Medical University, Wroclaw, Poland.
                © 2016 The Authors. European Journal of Heart Failure © 2016 European Society of Cardiology.


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