CLINICAL RESEARCH
Intravenous Iron Alone for the Treatment of Anemia in Patients With Chronic Heart Failure
Aidan P. Bolger, BSc, MRCP*,*,
Frederick R. Bartlett, MBBS ,
Helen S. Penston, SRN,
Justin O'Leary, BSc, DMU*,
Noel Pollock, MBBS,
Raffi Kaprielian, MD, MRCP and
Callum M. Chapman, MRCP
* Department of Clinical Cardiology, The Heart Hospital, London, United Kingdom
Clinical Heart Failure Service, West Middlesex University Hospital, Isleworth, United Kingdom
Manuscript received April 10, 2006;
revised manuscript received July 7, 2006,
accepted July 10, 2006.
* Reprint requests and correspondence: Dr. Aidan P. Bolger, Department of Adult Cardiology, The Heart Hospital, 16-18 Westmoreland Street, London W1G 8PH, United Kingdom (Email: aidan{at}bolgers.org).
OBJECTIVES: This study was undertaken to assess the hematologic, clinical, and biochemical response to intravenous iron in patients with chronic heart failure (CHF) and anemia.
BACKGROUND: Anemia is common in patients with CHF and is associated with higher morbidity and mortality. The combination of erythropoietin (EPO) and iron increases hemoglobin (Hb) and improves symptoms and exercise capacity in anemic CHF patients. It is not known whether intravenous iron alone is an effective treatment for anemia associated with CHF.
METHODS: Sixteen anemic patients (Hb  12 g/dl) with stable CHF (age 68.3 ± 11.5 years, 12 men, 9 participants New York Heart Association [NYHA] functional class II and the remainder class III, left ventricular ejection fraction 26 ± 13%) received a maximum of 1 g of iron sucrose by bolus intravenous injections over a 12-day treatment phase in an outpatient setting. Mean follow-up was 92 ± 6 days.
RESULTS: Hemoglobin rose from 11.2 ± 0.7 to 12.6 ± 1.2 g/dl (p = 0.0007), Minnesota Living with Heart Failure (MLHF) score fell (denoting improvement) from 33 ± 19 to 19 ± 14 (p = 0.02), 6-min walk distance increased from 242 ± 78 m to 286 ± 72 m (p = 0.01), and all patients recorded NYHA class II at study end (p < 0.02). Changes in MLHF score and 6-min walk distance related closely to changes in Hb (r = 0.76, p = 0.002; r = 0.56, p = 0.03, respectively). Of all baseline measurements, only iron and transferrin saturation correlated with increases in Hb (r = 0.60, p = 0.02; r = 0.60, p = 0.01, respectively). There were no adverse events relating to drug administration or during follow-up.
CONCLUSIONS: Intravenous iron sucrose, when used without concomitant EPO, is a simple and safe therapy that increases Hb, reduces symptoms, and improves exercise capacity in anemic patients with CHF. Further assessment of its efficacy should be made in a multicenter, randomized, placebo-controlled trial.
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Abbreviations and Acronyms
| | CHF = chronic heart failure | | EPO = erythropoietin | | Hb = hemoglobin | | GI = gastrointestinal | | MLHF = Minnesota Living with Heart Failure | | NYHA = New York Heart Association | | 6MW = 6-min walk |
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