Incident anaemia in older adults with heart failure: rate, aetiology, and association with outcomes

Impact of age on characteristics, performance measures and outcomes of inpatients for heart failure in Beijing, China

AIMS

This study aims to provide representative information on heart failure (HF) patients in China, especially older adults aged ≥75 years. We aim to clarify the age-related discrepancies in performance measures and the modifying effect of age on the impact of HF patients' characteristics on clinical outcomes.

METHODS AND RESULTS

All HF patients admitted into five tertiary and four secondary hospitals of the Capital Medical University were divided into two groups according to age: 1419 (53.3%) were <75 years, and 1244 (46.7%) were ≥75 years. Older HF patients were more likely to be women, with higher left ventricular ejection fraction, with co-morbidities including chronic obstructive pulmonary disease/asthma, anaemia, chronic kidney disease, stroke/transient ischemic attack (TIA), atrial fibrillation/atrial flutter, hypertension, and coronary artery disease, while obesity, diabetes mellitus, hypercholesterolaemia and valvular heart disease were more prevalent among younger HF patients. Left ventricular ejection fraction assessment was performed in a similar proportion of patients in the younger and older groups (81.7% vs. 80.5%, P = 0.426), while B-type natriuretic peptide/N terminal pro brain natriuretic peptide was tested in a lower proportion in the younger group (84.8% vs. 89%, P = 0.001). At discharge, HF with reduced ejection fraction patients were less likely to receive beta-blockers, angiotensin-converting enzyme inhibitors/angiotensin II receptor blockers, or combined beta-blockers and angiotensin-converting enzyme inhibitors/angiotensin II receptor blockers therapy in the older group (49.74% vs. 63.2%, P = 0.002; 52.9% vs. 64.7%, P = 0.006; and 28.57% vs. 45.5%, P < 0.001, respectively) but were equally likely to receive mineralocorticoid receptor antagonists in the two age groups (80.8% vs. 84.1%, P = 0.322). Older patients with HF had higher risk of in-hospital and 1 year mortality (2.7% vs. 1.3%, P = 0.011; 21.7% vs. 12.5%; P < 0.001, respectively). Higher body mass index was associated with better outcomes in both age groups. New York Heart Association functional class IV and estimated glomerular filtration rate < 60 mL/min/1.73 m2 were independent predictors of 1 year mortality. The associations between patients' characteristics and risk of mortality were not modified by age.

CONCLUSIONS

HF patients aged ≥75 years had distinct clinical profiles, received worse in-hospital therapies and experienced higher in-hospital and 1 year mortality.

Iron Deficiency in Heart Failure: A Scientific Statement from the Heart Failure Society of America

Iron deficiency is present in approximately 50% of patients with symptomatic heart failure and is independently associated with worse functional capacity, lower quality of, life and increased mortality. The purpose of this document is to summarize current knowledge of how iron deficiency is defined in heart failure and its epidemiology and pathophysiology, as well as pharmacological considerations for repletion strategies. This document also summarizes the rapidly expanding array of clinical trial evidence informing when, how, and in whom to consider iron repletion.

Safety and Efficacy of Intravenous Ferric Derisomaltose Compared to Iron Sucrose for Iron Deficiency Anemia in Patients with Chronic Kidney Disease With and Without Heart Failure

Ferric derisomaltose (FDI) is an intravenous (IV) high-dose iron formulation approved in the US for the treatment of iron deficiency anemia in adults who are intolerant of/have had an unsatisfactory response to oral iron, or who have non-dialysis-dependent chronic kidney disease (NDD-CKD). FERWON-NEPHRO was a randomized, open-label, multicenter clinical trial evaluating the safety and efficacy of a single infusion of FDI 1,000 mg versus up to 5 doses of iron sucrose (IS) 200 mg (recommended cumulative dose, 1,000 mg) over 8 weeks in patients with NDD-CKD and iron deficiency anemia. Of 1,525 patients included in the safety analysis, 244 (16%) had a history of heart failure (HF). Overall, the rate of serious or severe hypersensitivity reactions was low and did not differ between treatment groups. Cardiovascular adverse events (AEs) were reported for 9.4% of patients who had HF and 4.2% who did not. Time to first cardiovascular AE was longer following administration of FDI compared with IS (hazard ratio: 0.59 [95% CI: 0.37, 0.92]; p=0.0185), a difference that was similar in patients with or without HF (p=0.908 for interaction). Patients achieved a faster hematological response (assessed by changes in hemoglobin and ferritin concentrations, and increase in transferrin saturation) with FDI versus IS. In conclusion, in patients with NDD-CKD, a single infusion of FDI was safe, well tolerated, and was associated with fewer cardiovascular AEs and a faster hematological response, compared to multiple doses of IS. These effects were similar for patients with and without HF.

Influence of the degree of anaemia on the prognosis of older adults with heart failure (SPAN-HF study)

OBJECTIVE

To assess whether a sustained optimal haemoglobin value in the 3 months after admission for heart failure (HF) decompensation reduces morbidity and mortality during the 12 months after admission for acute HF.

PATIENTS AND METHOD

Retrospective study of the 1408 patients older than 65 years included in the RICA registry divided into 3 groups: no anaemia (group A), recovered anaemia (group B), and persistent anaemia (group C), according to haemoglobin levels on admission, and 3 months after discharge. Kaplan-Meier curves were constructed, comparing the groups using the log-rank test and a Cox regression model was performed to analyse survival.

RESULTS

578 (41.1%), 299 (21.2%) and 531 (37.7%) were included in groups A, B and C, respectively. We recorded a total of 768 deaths and readmissions. There were 23 (4%), 12 (4%) and 49 (9.2%), (p=.001) individuals who died due to HF and 154 (27%), 73 (24%) and 193 (36%) (P<.001) admissions for this pathology, respectively. Patients with persistent anaemia had a higher risk of death (RR 1.29, 95% CI 1.04-1.61, P=.024) or readmission (1.92, 95% CI 1.16-3, 19; P=.012) due to HF.

CONCLUSIONS

Persistent anaemia in the months after admission for HF increases morbidity and mortality in the subsequent year.

Iron deficiency and short-term adverse events in patients with decompensated heart failure

BACKGROUND

For patients with heart failure (HF), iron deficiency (ID) is a common therapeutic target. However, little is known about the utility of transferrin saturation (TSAT) or serum ferritin for risk stratification in decompensated HF (DHF) or the European Society of Cardiology's (ESC) current definition of ID (ferritin < 100 μg/L or TSAT < 20% if ferritin is 100-299 μg/L). We evaluated the association between these potential markers of ID and the risk of 30-day readmission for HF or death in patients with DHF.

METHODS

We retrospectively included 1701 patients from a multicenter registry of DHF. Serum ferritin and TSAT were evaluated 24-72 h after hospital admission, and multivariable Cox regression was used to assess their association with the composite endpoint.

RESULTS

Participants' median (quartiles) age was 76 (68-82) years, 43.8% were women, and 51.7% had a left ventricular ejection fraction > 50%. Medians for NT-proBNP, TSAT, and ferritin were 4067 pg/mL (1900-8764), 14.1% (9.0-20.3), and 103 ug/L (54-202), respectively. According to the current ESC definition, 1,246 (73.3%) patients had ID. By day 30, there were 177 (10.4%) events (95 deaths and 85 HF readmission). After multivariable adjustment, lower TSAT was associated with outcome (p = 0.009) but serum ferritin was not (HR 1.00; 95% confidence interval 0.99-1.00, p = 0.347).

CONCLUSIONS

Lower TSAT, but not ferritin, was associated with a higher risk of short-term events in patients with DHF. Further research is needed to confirm these findings and the utility of serum ferritin as a marker of ID in DHF.

New horizons in iron deficiency anaemia in older adults

Iron deficiency anaemia (IDA) is common in older adults and associated with a range of adverse outcomes. Differentiating iron deficiency from other causes of anaemia is important to ensure appropriate investigations and treatment. It is possible to make the diagnosis reliably using simple blood tests. Clinical evaluation and assessment are required to help determine the underlying cause and to initiate appropriate investigations. IDA in men and post-menopausal females is most commonly due to occult gastrointestinal blood loss until proven otherwise, although there is a spectrum of underlying causative pathologies. Investigation decisions should take account of the wishes of the patient and their competing comorbidities, individualising the approach. Management involves supplementation using oral or intravenous (IV) iron then consideration of treatment of the underlying cause of deficiency. Future research areas are outlined including the role of Hepcidin and serum soluble transferrin receptor measurement, quantitative faecal immunochemical testing, alternative dosing regimens and the potential role of IV iron preparations.

The Role of Older Age in Normocytic Anaemia in Type 2 Diabetes Mellitus

BACKGROUND

Older age has a significant association with anaemia. However, this has not been adequately investigated in the context of specific comorbidities such as Type 2 Diabetes Mellitus (T2DM).

OBJECTIVES

To investigate the role of age in Normocytic Anaemia (NCA) and the adverse outcomes of NCA in T2DM.

METHODS

Patients with NCA, either unexplained or related to Chronic Kidney Disease (CKD), were recruited from a diabetic clinic over six months. Anaemia was defined as a haemoglobin(Hb) < 130g/l for men and <120g/l for women. The relevant data were obtained by interviewing patients and review of medical records. Patients were followed for 12 months for pre-defined adverse outcomes.

RESULTS

Of the 354 patients assessed, 203 were included (mean age 63.12 ± 13.62 years, males 49.8%). The prevalence of NCA was 24% (49). Older age had a significant univariate association with NCA (p < 0.001) and this remained significant (adjusted Odds Ratio (OR) 1.24, 95% CI 1.16- 5.29) after adjusting for estimated Glomerular Filtration Rate (eGFR) < 60ml/min/1.73m2, albuminuria and other potential confounders. Adjusting for eGFR as a continuous variable also confirmed this significant association (OR1.15, 95% CI 1.10-7.01). In the subgroup of patients aged ≥ 75 years, only older age was significantly associated with NCA. The incidence of all-cause mortality and composite cardiovascular/cerebrovascular events was similar in the anaemic and nonanaemic groups.

CONCLUSION

NCA is common in T2DM and has a significant association with older age independent of CKD. The anaemia is mild in most patients and appears to have a benign course.