Iron deficiency defined as depleted iron stores accompanied by unmet cellular iron requirements identifies patients at the highest risk of death after an episode of acute heart failure.
Eur Heart J
; 35(36): 2468-76, 2014 Sep 21.
Article
en En
| MEDLINE
| ID: mdl-24927731
ABSTRACT
AIM:
Acute heart failure (AHF) critically deranges haemodynamic and metabolic homoeostasis. Iron is a key micronutrient for homoeostasis maintenance. We hypothesized that iron deficiency (ID) defined as depleted iron stores accompanied by unmet cellular iron requirements would in this setting predict the poor outcome. METHODS ANDRESULTS:
Among 165 AHF patients (age 65 ± 12 years, 81% men, 31% de novo HF), for ID diagnosis we prospectively applied low serum hepcidin reflecting depleted iron stores (<14.5 ng/mL, the 5th percentile in healthy peers), and high-serum soluble transferrin receptor (sTfR) reflecting unmet cellular iron requirements (≥1.59 mg/L, the 95th percentile in healthy peers). Concomitance of low hepcidin and high sTfR (the most profound ID) was found in 37%, isolated either high sTfR or low hepcidin was found in 29 and 9% of patients, and 25% of subjects demonstrated preserved iron status. Patients with low hepcidin and high sTfR had peripheral oedema, high NT-proBNP, high uric acid, low haemoglobin (P < 0.05), and 5% in-hospital mortality (0% in remaining patients). During the 12-month follow-up, 33 (20%) patients died. Those with low hepcidin and high sTfR had the highest 12-month mortality [(41% (95% CI 29-53%)] when compared with those with isolated high sTfR [15% (5-25%)], isolated low hepcidin [7% (0-19%)] and preserved iron status (0%) (P < 0.001). Analogous mortality patterns were seen separately in anaemics and non-anaemics.CONCLUSION:
Iron deficiency defined as depleted body iron stores and unmet cellular iron requirements is common in AHF, and identifies those with the poor outcome. Its correction may be an attractive therapeutic approach.Palabras clave
Texto completo:
1
Bases de datos:
MEDLINE
Asunto principal:
Deficiencias de Hierro
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Insuficiencia Cardíaca
Tipo de estudio:
Clinical_trials
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Etiology_studies
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Observational_studies
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Prevalence_studies
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Prognostic_studies
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Risk_factors_studies
Límite:
Aged
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Female
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Humans
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Male
País/Región como asunto:
Europa
Idioma:
En
Revista:
Eur Heart J
Año:
2014
Tipo del documento:
Article
País de afiliación:
Polonia