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Intravenous iron supplementation improves energy metabolism of exercising skeletal muscles without effect on either oxidative stress or inflammation in male patients with heart failure with reduced ejection fraction.
- Source :
-
Cardiology journal [Cardiol J] 2024; Vol. 31 (2), pp. 300-308. Date of Electronic Publication: 2023 Oct 19. - Publication Year :
- 2024
-
Abstract
- Background: Skeletal muscle dysfunction is a feature of heart failure (HF). Iron deficiency (ID) is prevalent in patients with HF associated with exercise intolerance and poor quality of life. Intravenous iron in iron deficient patients with HF has attenuated HF symptoms, however the pathomechanisms remain unclear. The aim of study was to assess whether intravenous iron supplementation as compared to placebo improves energy metabolism of skeletal muscles in patients with HF.<br />Methods: Men with heart failure with reduced ejection fraction (HFrEF) and ID were randomised in 1:1 ratio to either intravenous ferric carboxymaltose (IV FCM) or placebo. In vivo reduction of lactates by exercising skeletal muscles of forearm was analyzed. A change in lactate production between week 0 and 24 was considered as a primary endpoint of the study.<br />Results: There were two study arms: the placebo and the IV FCM (12 and 11 male patients with HFrEF). At baseline, there were no differences between these two study arms. IV FCM therapy as compared to placebo reduced the exertional production of lactates in exercising skeletal muscles. These effects were accompanied by a significant increase in both serum ferritin and transferrin saturation in the IV FCM arm which was not demonstrated in the placebo arm.<br />Conclusions: Intravenous iron supplementation in iron deficient men with HFrEF improves the functioning of skeletal muscles via an improvement in energy metabolism in exercising skeletal muscles, limiting the contribution of anaerobic reactions generating ATP as reflected by a lower in vivo lactate production in exercising muscles in patients with repleted iron stores.
- Subjects :
- Humans
Male
Middle Aged
Double-Blind Method
Aged
Treatment Outcome
Ventricular Function, Left drug effects
Administration, Intravenous
Inflammation physiopathology
Inflammation metabolism
Exercise Tolerance drug effects
Infusions, Intravenous
Biomarkers blood
Exercise physiology
Heart Failure physiopathology
Heart Failure drug therapy
Heart Failure metabolism
Energy Metabolism drug effects
Muscle, Skeletal metabolism
Stroke Volume drug effects
Maltose analogs & derivatives
Maltose administration & dosage
Oxidative Stress drug effects
Ferric Compounds administration & dosage
Subjects
Details
- Language :
- English
- ISSN :
- 1898-018X
- Volume :
- 31
- Issue :
- 2
- Database :
- MEDLINE
- Journal :
- Cardiology journal
- Publication Type :
- Academic Journal
- Accession number :
- 37853824
- Full Text :
- https://doi.org/10.5603/cj.97253