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Martens P, Ives L, Nguyen C, Kwon D, Hanna M, Tang WHW. The Impact of Iron Deficiency on Disease Severity and Myocardial Function in Cardiac Amyloidosis. AMERICAN JOURNAL OF MEDICINE OPEN 2024; 11:100063. [PMID: 39034938 PMCID: PMC11256277 DOI: 10.1016/j.ajmo.2023.100063] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 05/22/2023] [Accepted: 12/09/2023] [Indexed: 07/23/2024]
Abstract
Background Reduced cardiac energy is a hallmark feature of heart failure and is common in cardiac amyloidosis (CA) and can be aggravated by the presence of iron deficiency. Methods Retrospective analysis of a single tertiary care center CA registry. Prevalence of iron deficiency was determined based on two definitions: (1) Classic definition, ferritin < 100 µg/L irrespective of transferin saturation (TSAT) or ferritin between 100 and 300 µg/L with a TSAT < 20%, and (2) TSAT-based definition, TSAT < 20%. Results Out of a total of 393 CA patients who had a full set of iron indices (44% light chain [AL]-CA, 50% transthyretin [ATTR]-CA, remainder other or unspecified CA subtype), 56% had iron deficiency according to the classic definition and 58% according to the TSAT definition, with similar prevalence in AL-CA vs ATTR-CA (p = .135). Per both definitions 58% had anemia. Only the TSAT-based definition was associated with worse functional status (p = .039) and worse cardiac function. CA patients with a TSAT < 20% illustrated features of more pronounced right ventricular (RV) failure including lower TAPSE on echocardiography, lower RV ejection fraction and RV stroke volume index on CMR, increased right-sided filling pressures, lower pulmonary artery pulsatility index, and higher RAP/PCWP ratio by right heart catheterization. Neither the classic nor the TSAT-based definition was associated with a higher risk of all-cause mortality after covariate adjustment. Conclusion Iron deficiency is common in cardiac amyloidosis and, when identified with a TSAT < 20%, is associated with worse functional status and more pronounced RV disease, but not with a higher risk of all-cause mortality.
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Affiliation(s)
- Pieter Martens
- Department of Cardiovascular Medicine, Heart, Vascular and Thoracic Institute, Cleveland Clinic, Cleveland, Ohio, USA
- Ziekenhuis Oost Limburg, Genk, Belgium
| | - Lauren Ives
- Department of Cardiovascular Medicine, Heart, Vascular and Thoracic Institute, Cleveland Clinic, Cleveland, Ohio, USA
| | - Christopher Nguyen
- Department of Cardiovascular Medicine, Heart, Vascular and Thoracic Institute, Cleveland Clinic, Cleveland, Ohio, USA
| | - Deborah Kwon
- Department of Cardiovascular Medicine, Heart, Vascular and Thoracic Institute, Cleveland Clinic, Cleveland, Ohio, USA
| | - Mazen Hanna
- Department of Cardiovascular Medicine, Heart, Vascular and Thoracic Institute, Cleveland Clinic, Cleveland, Ohio, USA
| | - W. H. Wilson Tang
- Department of Cardiovascular Medicine, Heart, Vascular and Thoracic Institute, Cleveland Clinic, Cleveland, Ohio, USA
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Ohori K, Yano T, Katano S, Nagaoka R, Numazawa R, Yamano K, Fujisawa Y, Kouzu H, Nagano N, Fujito T, Nishikawa R, Ohwada W, Sato T, Furuhashi M. Relationship between serum iron level and physical function in heart failure patients is lost by presence of diabetes. ESC Heart Fail 2024; 11:513-523. [PMID: 38088258 PMCID: PMC10804160 DOI: 10.1002/ehf2.14610] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/07/2023] [Revised: 10/24/2023] [Accepted: 11/16/2023] [Indexed: 01/24/2024] Open
Abstract
AIMS Iron deficiency (ID) is common in patients with heart failure (HF) and is reportedly associated with exercise intolerance and impaired quality of life. Iron supplementation therapy in HF patients with ID improves exercise capacity. Conversely, protective roles of iron depletion in the development of diabetes mellitus (DM) and its complications have been proposed. This study aimed to determine the impact of ID on physical function in HF patients with and without DM. METHODS AND RESULTS We enrolled consecutive patients who were admitted to our institute for HF diagnosis and management. The short physical performance battery (SPPB) was used to evaluate physical function, and low physical function was defined as an SPPB score of <10 points as individuals with SPPB scores of <10 points are most likely to be classified as frail and are at high risk for disability and future adverse events, including death. ID was defined as serum ferritin < 100 or 100-299 ng/mL when transferrin saturation (TSAT) was <20% according to the HF guidelines. Among the 562 HF patients (72 ± 14 years old; 56% male), 329 patients (58%) and 191 patients (34%) had ID and low physical function, respectively. Multivariate logistic regression analysis showed that TSAT as a continuous variable, but not ID, was a predictor of low physical function (odds ratio: 0.980, P = 0.024). Subgroup analysis showed that a significant association between low TSAT and low physical function was lost in HF patients with DM (P for interaction < 0.001). A spline dose-response curve for the relationship between TSAT and risk of low physical function with adjustments for covariates associated with low physical function in non-DM patients was almost linear with an increase in the risk of low physical function as the TSAT increased, but such a relationship was not found in the analyses of DM patients. A lack of close TSAT-SPPB relationship in HF patients with DM was confirmed also in a propensity-score-matched cohort. CONCLUSIONS TSAT as a continuous variable, but not ID, was independently associated with physical function in HF patients, and a significant association was lost in patients with HF and DM, suggesting a limited impact of iron supplementation therapy in HF patients with DM.
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Affiliation(s)
- Katsuhiko Ohori
- Department of Cardiovascular, Renal and Metabolic MedicineSapporo Medical University School of MedicineSapporoJapan
- Department of CardiologyHokkaido Cardiovascular HospitalSapporoJapan
| | - Toshiyuki Yano
- Department of Cardiovascular, Renal and Metabolic MedicineSapporo Medical University School of MedicineSapporoJapan
| | - Satoshi Katano
- Division of RehabilitationSapporo Medical University HospitalSapporoJapan
| | - Ryohei Nagaoka
- Division of RehabilitationSapporo Medical University HospitalSapporoJapan
| | - Ryo Numazawa
- Division of RehabilitationSapporo Medical University HospitalSapporoJapan
- Graduate School of MedicineSapporo Medical UniversitySapporoJapan
| | - Kotaro Yamano
- Division of RehabilitationSapporo Medical University HospitalSapporoJapan
| | - Yusuke Fujisawa
- Division of RehabilitationSapporo Medical University HospitalSapporoJapan
| | - Hidemichi Kouzu
- Department of Cardiovascular, Renal and Metabolic MedicineSapporo Medical University School of MedicineSapporoJapan
| | - Nobutaka Nagano
- Department of Cardiovascular, Renal and Metabolic MedicineSapporo Medical University School of MedicineSapporoJapan
| | - Takefumi Fujito
- Department of Cardiovascular, Renal and Metabolic MedicineSapporo Medical University School of MedicineSapporoJapan
| | - Ryo Nishikawa
- Department of Cardiovascular, Renal and Metabolic MedicineSapporo Medical University School of MedicineSapporoJapan
| | - Wataru Ohwada
- Department of Cardiovascular, Renal and Metabolic MedicineSapporo Medical University School of MedicineSapporoJapan
| | - Tatsuya Sato
- Department of Cellular Physiology and Signal TransductionSapporo Medical University School of MedicineSapporoJapan
| | - Masato Furuhashi
- Department of Cardiovascular, Renal and Metabolic MedicineSapporo Medical University School of MedicineSapporoJapan
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Shabeer H, Samore N, Ahsan S, Gondal MUR, Shah BUD, Ashraf A, Faraz M, Malik J. Safety and Efficacy of Ferric Carboxymaltose in Heart Failure With Preserved Ejection Fraction and Iron Deficiency. Curr Probl Cardiol 2024; 49:102125. [PMID: 37806645 DOI: 10.1016/j.cpcardiol.2023.102125] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/24/2023] [Accepted: 09/30/2023] [Indexed: 10/10/2023]
Abstract
Heart Failure with Preserved Ejection Fraction (HFpEF) is a prevalent cardiovascular condition characterized by a complex pathophysiology and limited therapeutic options. Coinciding iron deficiency often compounds the clinical picture, contributing to symptom burden and adverse outcomes. The review underscores the urgency for effective treatments in light of its increasing incidence and considerable healthcare burden. It highlights the clinical significance of addressing iron deficiency in HFpEF patients. FCM emerges as a promising therapeutic modality, demonstrating the ability to rapidly restore iron stores and enhance patients' quality of life while reducing hospitalization rates and mortality. The review thoroughly elucidates the impact of iron deficiency on HFpEF symptoms and outcomes, elucidating how FCM effectively mitigates these challenges. Detailed discussions encompass FCM's mechanism of action, pharmacokinetics, and safety profile. Notably, FCM's adaptability to diverse patient profiles and clinical settings is emphasized, reinforcing its clinical utility. Clinical evidence, including study designs, patient cohorts, and key findings, affirms FCM's potential as a valuable therapeutic option. Real-world data analysis further underscores FCM's practicality and safety beyond controlled clinical trials. The review concludes by addressing future research directions and critical research gaps, accentuating the need for mechanistic insights, long-term outcome studies, and refined patient selection criteria. As FCM increasingly integrates into clinical practice, it offers promise in revolutionizing HFpEF management, addressing an unmet need in this intricate cardiovascular condition.
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Affiliation(s)
- Hassan Shabeer
- Department of Cardiovascular Medicine, Armed Forces Institute of Cardiology, Rawalpindi, Pakistan
| | - Naseer Samore
- Department of Cardiovascular Medicine, Armed Forces Institute of Cardiology, Rawalpindi, Pakistan
| | - Salman Ahsan
- Department of Medicine, Shifa College of Medicine, Islamabad, Pakistan
| | | | - Badar U Din Shah
- Department of Medicine, Pakistan Institute of Medical Sciences, Islamabad, Pakistan
| | - Amna Ashraf
- Department of Medicine, Millitary Hospital, Rawalpindi, Pakistan
| | - Maria Faraz
- Department of Cardiovascular Medicine, Cardiovascular Analytics Group, Islamabad, Pakistan.
| | - Jahanzeb Malik
- Department of Cardiovascular Medicine, Cardiovascular Analytics Group, Islamabad, Pakistan
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Walter S, Mertens C, Muckenthaler MU, Ott C. Cardiac iron metabolism during aging - Role of inflammation and proteolysis. Mech Ageing Dev 2023; 215:111869. [PMID: 37678569 DOI: 10.1016/j.mad.2023.111869] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/26/2023] [Revised: 09/01/2023] [Accepted: 09/03/2023] [Indexed: 09/09/2023]
Abstract
Iron is the most abundant trace element in the human body. Since iron can switch between its 2-valent and 3-valent form it is essential in various physiological processes such as energy production, proliferation or DNA synthesis. Especially high metabolic organs such as the heart rely on iron-associated iron-sulfur and heme proteins. However, due to switches in iron oxidation state, iron overload exhibits high toxicity through formation of reactive oxygen species, underlining the importance of balanced iron levels. Growing evidence demonstrates disturbance of this balance during aging. While age-associated cardiovascular diseases are often related to iron deficiency, in physiological aging cardiac iron accumulates. To understand these changes, we focused on inflammation and proteolysis, two hallmarks of aging, and their role in iron metabolism. Via the IL-6-hepcidin axis, inflammation and iron status are strongly connected often resulting in anemia accompanied by infiltration of macrophages. This tight connection between anemia and inflammation highlights the importance of the macrophage iron metabolism during inflammation. Age-related decrease in proteolytic activity additionally affects iron balance due to impaired degradation of iron metabolism proteins. Therefore, this review accentuates alterations in iron metabolism during aging with regards to inflammation and proteolysis to draw attention to their implications and associations.
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Affiliation(s)
- Sophia Walter
- German Institute of Human Nutrition Potsdam-Rehbruecke, Department of Molecular Toxicology, Nuthetal, Germany; TraceAge-DFG Research Unit on Interactions of Essential Trace Elements in Healthy and Diseased Elderly, Potsdam-Berlin-Jena, Wuppertal, Germany; DZHK (German Center for Cardiovascular Research), partner site Berlin, Berlin, Germany
| | - Christina Mertens
- Center for Translational Biomedical Iron Research, Department of Pediatric Oncology, Immunology, and Hematology, University of Heidelberg, Heidelberg, Germany; DZHK (German Center for Cardiovascular Research), Heidelberg, Mannheim, Germany
| | - Martina U Muckenthaler
- Center for Translational Biomedical Iron Research, Department of Pediatric Oncology, Immunology, and Hematology, University of Heidelberg, Heidelberg, Germany; DZHK (German Center for Cardiovascular Research), Heidelberg, Mannheim, Germany; Molecular Medicine Partnership Unit, Heidelberg, Germany; Translational Lung Research Center Heidelberg (TLRC), German Center for Lung Research (DZL), Heidelberg, Germany
| | - Christiane Ott
- German Institute of Human Nutrition Potsdam-Rehbruecke, Department of Molecular Toxicology, Nuthetal, Germany; TraceAge-DFG Research Unit on Interactions of Essential Trace Elements in Healthy and Diseased Elderly, Potsdam-Berlin-Jena, Wuppertal, Germany; DZHK (German Center for Cardiovascular Research), partner site Berlin, Berlin, Germany.
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Hamed M, Elseidy SA, Ahmed A, Thakker R, Mansoor H, Khalili H, Mohsen A, Mamas MA, Banerjee S, Kumbhani DJ, Elgendy IY, Elbadawi A. Intravenous iron therapy among patients with heart failure and iron deficiency: An updated meta-analysis of randomized controlled trials. Heliyon 2023; 9:e17245. [PMID: 37383191 PMCID: PMC10293724 DOI: 10.1016/j.heliyon.2023.e17245] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/12/2023] [Revised: 06/10/2023] [Accepted: 06/12/2023] [Indexed: 06/30/2023] Open
Abstract
Background Randomized clinical trials (RCTs) evaluating the role of intravenous (IV) iron administration in patients with heart failure (HF) and iron deficiency (ID) have yielded inconsistent results. Methods Electronic search of MEDLINE, EMBASE and OVID databases was performed until November 2022 for RCTs that evaluated the role of IV iron administration in patients with HF and ID. The main study outcomes were the composite of HF hospitalization or cardiovascular mortality, and individual outcome of HF hospitalization. Summary estimates were evaluated using random effects model. Results The final analysis included 12 RCTs with 3,492 patients (1,831 patients in the IV iron group and 1,661 patients in the control group). The mean follow-up was 8.3 months. IV iron was associated with a lower incidence in the composite of HF hospitalization or cardiovascular mortality (31.9% vs. 45.3%; relative risk [RR] 0.72; 95% confidence interval [CI] 0.59-0.88) and individual outcome of HF hospitalization (28.4% vs. 42.2; RR 0.69; 95% CI 0.57-0.85). There was no significant difference between both groups in cardiovascular mortality (RR 0.88; 95% CI 0.75-1.04) and all-cause mortality (RR 0.95; 95% CI 0.83-1.09). IV iron was associated with lower New York Heart Association class and higher left ventricular ejection fraction (LVEF). Meta-regression analyses showed no effect modification for the main outcomes based on age, hemoglobin level, ferritin level or LVEF. Conclusion Among patients with HF and ID, IV iron administration was associated with reduction in the composite of HF hospitalization or cardiovascular mortality and driven by a reduction in HF hospitalization.
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Affiliation(s)
- Mohamed Hamed
- Department of Internal Medicine, Florida Atlantic University, Boca Raton, FL, USA
| | - Sheref A. Elseidy
- Department of Internal Medicine, Rochester General Hospital, Rochester, NY, USA
| | - Asmaa Ahmed
- Department of Internal Medicine, Rochester General Hospital, Rochester, NY, USA
| | - Ravi Thakker
- Division of Cardiology, University of Texas Medical Branch, Galveston, TX, USA
| | - Hend Mansoor
- Department of Pharmacy, University of Kentucky, Lexington, KY, USA
| | - Houman Khalili
- Division of Cardiology, Memorial Healthcare System, Hollywood, FL, USA
| | - Amr Mohsen
- Division of Cardiology, Loma Linda University, Loma Linda, CA, USA
| | - Mamas A. Mamas
- Keele Cardiovascular Research Group, Keele University, Keele, UK
| | - Subhash Banerjee
- Division of Cardiology, Baylor University Medical Center, Dallas, TX, USA
| | - Dharam J. Kumbhani
- Division of Cardiology, University of Texas Southwestern Medical Center, Dallas, TX, USA
| | - Islam Y. Elgendy
- Division of Cardiovascular Medicine, Gill Heart Institute, University of Kentucky, Lexington, KY, USA
| | - Ayman Elbadawi
- Division of Cardiology, University of Texas Southwestern Medical Center, Dallas, TX, USA
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Dhaliwal S, Kalogeropoulos AP. Markers of Iron Metabolism and Outcomes in Patients with Heart Failure: A Systematic Review. Int J Mol Sci 2023; 24:ijms24065645. [PMID: 36982717 PMCID: PMC10059277 DOI: 10.3390/ijms24065645] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/23/2023] [Revised: 03/08/2023] [Accepted: 03/10/2023] [Indexed: 03/18/2023] Open
Abstract
Iron deficiency (ID) in conjunction with heart failure (HF) poses a challenge for clinicians and is associated with worse HF outcomes. Treatment of ID with IV iron supplementation for patients with HF has demonstrated benefits in quality of life (QoL) and HF-related hospitalizations. The aim of this systematic review was to summarize the evidence linking iron metabolism biomarkers with outcomes in patients with HF to assist in the optimal use of these biomarkers for patient selection. A systematic review of observational studies in English from 2010 to 2022 was conducted using PubMed, with keywords of “Heart Failure” and respective iron metabolism biomarkers (“Ferritin”, “Hepcidin”, “TSAT”, “Serum Iron”, and “Soluble Transferrin Receptor”). Studies pertaining to HF patients, with available quantitative data on serum iron metabolism biomarkers, and report of specific outcomes (mortality, hospitalization rates, functional capacity, QoL, and cardiovascular events) were included, irrespective of left ventricular ejection fraction (LVEF) or other HF characteristics. Clinical trials of iron supplementation and anemia treatment were removed. This systematic review was conducive to formal assessment of risk of bias via Newcastle-Ottawa Scale. Results were synthesized based on their respective adverse outcomes and iron metabolism biomarker(s). Initial and updated searches identified 508 unique titles once duplicates were removed. The final analysis included 26 studies: 58% focused on reduced LVEF; age range was 53–79 years; males composed 41–100% of the reported population. Statistically significant associations of ID were observed with all-cause mortality, HF hospitalization rates, functional capacity, and QoL. Increased risk for cerebrovascular events and acute renal injury have also been reported, but these findings were not consistent. Varying definitions of ID were utilized among the studies; however, most studies employed the current European Society of Cardiology criteria: serum ferritin < 100 ng/mL or the combination of ferritin between 100–299 ng/mL and transferrin saturation (TSAT) < 20%. Despite several iron metabolism biomarkers demonstrating strong association with several outcomes, TSAT better predicted all-cause mortality, as well as long-term risk for HF hospitalizations. Low ferritin was associated with short-term risk for HF hospitalizations, worsening functional capacity, poor QoL, and development of acute renal injury in acute HF. Elevated soluble transferrin receptor (sTfR) levels were associated with worse functional capacity and QoL. Finally, low serum iron was significantly associated with increased risk for cardiovascular events. Considering the lack of consistency among the iron metabolism biomarkers for association with adverse outcomes, it is important to incorporate additional biomarker data, beyond ferritin and TSAT, when assessing for ID in HF patients. These inconsistent associations question how best to define ID to ensure proper treatment. Further research, potentially tailored to specific HF phenotypes, is required to optimize patient selection for iron supplementation therapy and appropriate targets for iron stores replenishment.
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Kalogeropoulos AP, Lewis GD. Benefits of intravenous iron supplementation in patients with heart failure: mounting evidence and open questions. Eur J Heart Fail 2023; 25:538-540. [PMID: 36722375 DOI: 10.1002/ejhf.2787] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/20/2023] [Accepted: 01/24/2023] [Indexed: 02/02/2023] Open
Affiliation(s)
- Andreas P Kalogeropoulos
- Division of Cardiology, Department of Medicine, Renaissance School of Medicine, Stony Brook University, Stony Brook, NY, USA
| | - Gregory D Lewis
- Division of Cardiology, Department of Medicine, Massachusetts General Hospital, Boston, MA, USA
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