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Iron deficiency in worsening heart failure is associated with reduced estimated protein intake, fluid retention, inflammation, and antiplatelet use.

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posted on 2019-10-02, 12:47 authored by HH van der Wal, N Grote Beverborg, K Dickstein, SD Anker, CC Lang, LL Ng, DJ van Veldhuisen, AA Voors, P van der Meer
AIMS: Iron deficiency (ID) is common in heart failure (HF) patients and negatively impacts symptoms and prognosis. The aetiology of ID in HF is largely unknown. We studied determinants and the biomarker profile of ID in a large international HF cohort. METHODS AND RESULTS: We studied 2357 worsening HF patients from the BIOSTAT-CHF cohort. ID was defined as transferrin saturation <20%. Univariable and multivariable logistic regression models were constructed to identify determinants for ID. We measured 92 cardiovascular markers (Olink Cardiovascular III) to establish a biomarker profile of ID. The primary endpoint was the composite of all-cause mortality and first HF rehospitalization. Mean age (±standard deviation) of all patients was 69 ± 12.0 years, 26.1% were female and median N-terminal pro B-type natriuretic peptide levels (+interquartile range) were 4305 (2360-8329) ng/L. Iron deficiency was present in 1453 patients (61.6%), with highest prevalence in females (71.1% vs. 58.3%; P < 0.001). Independent determinants of ID were female sex, lower estimated protein intake, higher heart rate, presence of peripheral oedema and orthopnoea, chronic kidney disease, lower haemoglobin, higher C-reactive protein levels, lower serum albumin levels, and P2Y12 inhibitor use (all P < 0.05). None of these determinants were sex-specific. The biomarker profile of ID largely consisted of pro-inflammatory markers, including paraoxonase 3 (PON3) and tartrate-resistant acid phosphatase type 5. In multivariable Cox proportional hazard regression analyses, ID was associated to worse outcome, independently of predictors of ID (hazard ratio 1.25, 95% confidence interval 1.06-1.46; P = 0.007). CONCLUSION: Our data suggest that the aetiology of ID in worsening HF is complex, multifactorial and seems to consist of a combination of reduced iron uptake (malnutrition, fluid overload), impaired iron storage (inflammation, chronic kidney disease), and iron loss (antiplatelets).

Funding

The BIOSTAT-CHF study was supported by the European Commission (FP7-242209-BIOSTAT-CHF).

History

Citation

European Heart Journal, 2019, ehz680

Author affiliation

/Organisation/COLLEGE OF LIFE SCIENCES/School of Medicine/Department of Cardiovascular Sciences

Version

  • VoR (Version of Record)

Published in

European Heart Journal

Publisher

Oxford University Press (OUP) for European Society of Cardiology

eissn

1522-9645

Acceptance date

2019-09-10

Copyright date

2019

Available date

2019-10-02

Publisher version

https://academic.oup.com/eurheartj/advance-article/doi/10.1093/eurheartj/ehz680/5574384

Notes

Supplementary material is available at European Heart Journal online. https://academic.oup.com/eurheartj/article-lookup/doi/10.1093/eurheartj/ehz680#supplementary-data

Language

en

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