Cognition and Frailty in Patients With Heart Failure: A Systematic Review of the Association Between Frailty and Cognitive Impairment

The association between cognitive frailty and the risk of fall occurrence in older adults: a meta-analysis of cohort studies

Background

Cognitive frailty increases the risk of fall occurrence. However, previous studies have shown inconsistent correlations between cognitive frailty and the risk of fall occurrence.

Objective

To systematically review studies and explore the association between cognitive frailty and the risk of fall occurrence.

Methods

Databases were systematically searched. Meta-analysis was performed using RevMan 5.4 software after evaluation of the quality of the included studies by 2 researchers.

Results

A total of five studies including 16,962 patients were included. The results of Meta-analysis showed that the cognitive frailty group increased the risk of occurrence of falls in older adults [OR = 1.38, 95% CI (1.09, 1.73), p = 0.006]. Subgroup analyses showed that cognitive frailty in older adults increased the risk of fall occurrence using different cognitive frailty assessment tools, study participants from the community, different regions, and different sample sizes.

Conclusion

The results of this study suggest that cognitive frailty in older adults is an independent risk factor for the occurrence of falls, and it is recommended that caregivers strengthen the assessment of cognitive aspects of older adults admitted to the hospital.

Frailty in chronic heart failure: a multidimensional assessment of older patients undergoing cardiac rehabilitation

BACKGROUND

Chronic heart failure (CHF) is often associated with cognitive, psychological, and functional disorders. In addition, since patients suffering from this condition are often older adults, the presence of frailty could worsen the clinical situation.

METHODS

The present multicentric observational study aimed to investigate, through a multidimensional evaluation, the associations between clinical, functional, cognitive, psychological, and frailty variables of older (age ≥65) CHF inpatients undergoing cardiac rehabilitation and to identify the eventual independent predictors of the frailty status.

RESULTS

The study included 85 patients (mean age 73.88±5.84). The disease severity of the sample was moderate (left ventricular ejection fraction = 41.79±15.40). Among the patients, 32.94% had cognitive impairment, 12.94% and 14.11% reported moderate to severe anxious or depressive symptoms, respectively, and 34.12% were classified as frail (Clinical Frailty Scale [CFS] score ≥5). The CFS score showed a negative correlation with cognitive status (Addenbrooke's Cognitive Examination III [ACE III] [r=-0.48, P≤0.0001] and Frontal Assessment Battery [FAB] [r=-0.33, P=0.0001]) and functional status (Short Physical Performance Battery [SPPB] [r=-0.55, P≤0.0001] and Barthel Index [r=-0.52, P≤0.0001]), while showing a positive correlation with comorbidities (Cumulative Illness Rating Scale [CIRS] [r=0.40, P≤0.0001]). The stepwise regression analysis revealed that ACE III, SPPB, and CIRS were independent predictors of frailty status (CFS).

CONCLUSIONS

Frailty is an important variable that should be considered since it is linked with most of the variables that play a role in the management and outcomes of older CHF patients and, thus, its evaluation should be integrated into the usual assessment in cardiac rehabilitation.

Clinical and Psychological Factors Associated with Frailty in Patients with Heart Failure

Background/Objectives: Heart failure (HF) is a significant public health issue with high morbidity and mortality rates. This study aims to investigate the interrelationships between frailty, cognitive impairment, and depression in older adults with HF, specifically focusing on how the physical and neuropsychiatric dimensions of frailty contribute to cognitive decline. Methods: This study included 250 patients aged 60 years or older, diagnosed with HF and hospitalized for acute decompensated HF. The patients were assessed using standardized protocols for frailty, cognitive function, and depression. The frailty was evaluated using Fried's phenotype criteria, cognitive function with MMSE and MoCA, and depression and anxiety with HADS and PHQ-9. Statistical analyses included univariable and multivariable linear regression to identify the predictors of frailty. Results: Of the 250 patients, 151 (60.4%) were identified as frail. The frail patients were older (mean age 73.58 ± 6.80 years) compared to the non-frail patients (mean age 70.39 ± 6.16 years, p = 0.0002). Significant differences were observed in the NYHA class, length of the hospital stay, and prevalence of diabetes mellitus. The frail patients had worse cognitive (MMSE: 27.39 ± 2.12 vs. 28.13 ± 1.72, p = 0.004; MoCA: 24.68 ± 3.65 vs. 25.64 ± 3.98, p = 0.050) and psychological outcomes (higher prevalence of marked depression based on HADS categories: 8.61% vs. 1.01%, p = 0.021; and PHQ-9 categories: severe depression: 2.65% vs. 1.01%, p < 0.001). Conclusions: Age, C-reactive protein (CRP) levels, and anxiety were identified as independent predictors of frailty in the patients with heart failure. Depression, cognitive dysfunction, and the length of the hospital stay showed significant differences between the frail and non-frail patients in the group comparisons but were not independent predictors.

Cardiac Contributions to Brain Health: A Scientific Statement From the American Heart Association

The burden of neurologic diseases, including stroke and dementia, is expected to grow substantially in the coming decades. Thus, achieving optimal brain health has been identified as a public health priority and a major challenge. Cardiovascular diseases are the leading cause of death and disability in the United States and around the world. Emerging evidence shows that the heart and the brain, once considered unrelated organ systems, are interdependent and linked through shared risk factors. More recently, studies designed to unravel the intricate pathogenic mechanisms underpinning this association show that people with various cardiac conditions may have covert brain microstructural changes and cognitive impairment. These findings have given rise to the idea that by addressing cardiovascular health earlier in life, it may be possible to reduce the risk of stroke and deter the onset or progression of cognitive impairment later in life. Previous scientific statements have addressed the association between cardiac diseases and stroke. This scientific statement discusses the pathogenic mechanisms that link 3 prevalent cardiac diseases of adults (heart failure, atrial fibrillation, and coronary heart disease) to cognitive impairment.

Synergistic effects of cognitive frailty and comorbidities on disability: a community-based longitudinal study

OBJECTIVE

In this study, we aimed to assess the synergistic effects of cognitive frailty (CF) and comorbidity on disability among older adults.

METHODS

Out of the 1318 participants from the Malaysian Towards Useful Aging (TUA) study, only 400 were included in the five-year follow-up analysis. A comprehensive interview-based questionnaire covering socio-demographic information, health status, biochemical indices, cognitive and physical function, and psychosocial factors was administered. Binary logistic regression analysis was employed to estimate the independent and combined odd ratios (ORs). Measures such as the relative excess risk due to interaction (RERI), the attributable proportion of risk due to the interaction, and the synergy index were used to assess the interaction between CF and comorbidity.

RESULTS

Participants with CF (24.1%) were more likely to report disability compared to those without CF (10.3%). Synergistic effects impacting disability were observed between CF and osteoarthritis (OA) (OR: 6.675, 95% CI: 1.057-42.158; RERI: 1.501, 95% CI: 1.400-1.570), CF and heart diseases (HD) (OR: 3.480, 95% CI: 1.378-8.786; RERI: 0.875, 95% CI: 0.831-0.919), CF and depressive symptoms (OR: 3.443, 95% CI: 1.065-11.126; RERI: 0.806, 95% CI: 0.753-0.859), and between CF and diabetes mellitus (DM) (OR: 2.904, 95% Confidence Interval (CI): 1.487-5.671; RERI: 0.607, 95% CI: 0.577-0.637).

CONCLUSION

These findings highlight the synergism between the co-existence of CF and comorbidity, including OA, HD, DM, and depressive symptoms, on disability in older adults. Screening, assessing, and managing comorbidities, especially OA, HD, DM and depressive symptoms, when managing older adults with CF are crucial for reducing the risk of or preventing the development of disability.

Frailty index and risk of delirium in hospitalized patients: a two-sample Mendelian randomization study

Objective

Observational studies suggest that the frailty index (FI) is closely related to delirium, but the relationship between them is still uncertain due to the influence of various confounding factors. Therefore, two-sample Mendelian randomization (MR) was used to explore the causal relationship between the FI and delirium risk.

Methods

This study obtained pooled statistics for the FI and delirium from two of the most extensive genome-wide association studies. To make the results more robust and reliable, supplementary analyses were performed using several robust analytical methods (inverse-variance weighting, MR-Egger regression, and weighted median). In addition, this study used the MR-Egger intercept test, Cochran's Q test, funnel plots and the leave-one-out method to evaluate the pleiotropy and heterogeneity among the abovementioned genetic variation instrumental variables.

Results

Frailty might increase the relative risk of delirium, as shown by IVW (OR = 1.849, 95% CI 0.027∼2.067, P = 0.044), weighted median (OR = 1.726, 95% CI -0.178∼2.664, P = 0.083), MR-Egger regression (OR = 1.768, 95% CI -3.08∼6.171, P = 0.525) and leave-one-out sensitivity analysis (P = 0.058). Although the WME method and MR-Egger regression analysis showed no statistically significant causal relationship between the FI and the risk of delirium, the direction of the causal effect was consistent with the IVW method.

Conclusion

There is a notable correlation between a higher FI and an elevated risk of delirium. This indicates that healthcare providers should take proactive measures to prevent delirium in hospitalized patients with a higher FI.

Pain and Heart Failure During Transport by Emergency Medical Services and Its Associated Outcomes: Hospitalization, Mortality, and Length of Stay

BACKGROUND

Over 22% of patients with heart failure (HF) are transported by emergency medical services (EMSs) for a primary complaint of pain. The relationship between a primary complaint of pain on hospitalization status, mortality, or length of stay following transport by EMS is understudied.

OBJECTIVES

The objective of this study was to determine whether a primary complaint of pain during EMS transport predicted hospitalization status, mortality, or inpatient length of stay.

METHODS

In this retrospective longitudinal cohort study, data were analyzed from electronic health records of 3539 patients with HF. Descriptive statistics and multivariate logistic and linear regression analyses were used to achieve study objectives.

RESULTS

Demographics were mean age 64.83 years (standard deviation [SD] = 14.58); gender 57.3% women, 42.7% men; self-reported race 56.2% black, 43.2% white, and 0.7% other. Of 3539 patients, 2346 (66.3%) were hospitalized, 149 (4.2%) died, and the mean length of stay was 6.02 (SD = 7.55) days. A primary complaint of pain did not predict increased odds of in-hospital mortality but did predict 39% lower odds of hospitalization (p < .001), and 26.7% shorter length of stay (p < .001). Chest pain predicted 49% lower odds of hospitalization (p < .001) and 34.1% (p < .001) shorter length of stay, whereas generalized pain predicted 45% lower odds of hospitalization (p = .044) following post-hoc analysis.

CONCLUSIONS

A primary complaint of chest pain predicted lower odds of hospitalization and shorter length of stay, possibly due to established treatment regimens. Additional research is needed to examine chronic pain rather than a primary complaint of pain.

Role of Cognitive Frailty in Older Adults With Cardiovascular Disease

As the older adult population expands, an increasing number of patients affected by geriatric syndromes are seen by cardiovascular clinicians. One such syndrome that has been associated with poor outcomes is cognitive frailty: the simultaneous presence of cognitive impairment, without evidence of dementia, and physical frailty, which results in decreased cognitive reserve. Driven by common pathophysiologic underpinnings (eg, inflammation and neurohormonal dysregulation), cardiovascular disease, cognitive impairment, and frailty also share the following risk factors: hypertension, diabetes, obesity, sedentary behavior, and tobacco use. Cardiovascular disease has been associated with the onset and progression of cognitive frailty, which may be reversible in early stages, making it essential for clinicians to diagnose the condition in a timely manner and prescribe appropriate interventions. Additional research is required to elucidate the mechanisms underlying the development of cognitive frailty, establish preventive and therapeutic strategies to address the needs of older patients with cardiovascular disease at risk for cognitive frailty, and ultimately facilitate targeted intervention studies.

A new opportunity for patient selection and optimization: Systematic review of cognitive frailty in patients undergoing left ventricular assist device implantation

The prognostic implication of cognitive frailty assessment in patients undergoing left ventricular assist device (LVAD) implantation remains unclear. We conducted a systematic review to evaluate assessment strategies and their significance for patients undergoing LVAD implantation. A comprehensive search of PubMed, Embase, and the Cumulative Index to Nursing and Allied Health Literature from inception until September 2022 and a review of meeting proceedings were performed following Preferred Reporting Items for Systematic Reviews and Meta-Analyses guidelines. Studies that investigated the prognostic value of cognitive frailty or any related cognition-based assessment in patients undergoing LVAD implantation were included. Study characteristics, patient demographics, and type of cognitive assessment were extracted. Primary outcomes included length of stay, readmissions, and all-cause mortality. Of 664 records retrieved, 12 (4 prospective, 8 retrospective) involving 16 737 subjects (mean age, 56.9 years; 78.3% men) met inclusion criteria; 67% of studies used the Montreal Cognitive Assessment to assess cognitive frailty. Outcomes reported were highly variable, with 42% reporting readmission, 33% reporting LOS, and 83% reporting mortality data; only two studies provided data on all three. Cognitive frailty was associated with prolonged length of stay in 75% of studies reporting this outcome. Only 40% and 60% of studies that reported readmissions and mortality outcomes, respectively, suggested a predictive association. Pre-LVAD cognitive frailty is likely associated with worse outcomes postimplant. However, the heterogenous reporting of outcomes data and lack of consistent definitions in the literature limit its prognostic value. Additional research on markers for cognitive frailty and improved standards of reporting may allow for future analyses and enhance preoperative risk assessment and patient care. Geriatr Gerontol Int 2024; 24: 204-210.

One-year trajectories of self-care behaviours and unplanned hospital readmissions among patients with heart failure: A prospective longitudinal study

AIM AND OBJECTIVES

This study aimed to identify the associations between longitudinal trajectories of self-care behaviours and unplanned hospital readmissions in patients with heart failure.

BACKGROUND

Adherence to self-care behaviours is crucial to prevent hospital readmissions; however, self-care behaviours remain unsatisfactory among patients with heart failure. Studies of long-term trajectories of self-care behaviours and their influence on hospital readmissions are limited in this population.

DESIGN

A prospective, longitudinal observational study.

METHODS

Among 137 participants with heart failure (mean age 67.36 years, 62% men), we analysed the 1-year follow-up data to determine the association between 1-year trajectories of self-care behaviours and hospital readmissions using Kaplan-Meier analysis and multivariable Cox regression, adjusted for confounding variables.

RESULTS

Self-care behaviour trajectories of heart failure patients were classified as 'high-stable' (58.4%) or 'low-sustained' (41.6%). The cumulative rate of readmissions for the low-sustained class was higher than that of the high-stable class for all periods. Factors influencing readmissions included anaemia, cognitive function, frailty and self-care behaviours trajectories. The low-sustained class had a 2.77 times higher risk of readmissions within 1 year than that in the high-stable class.

CONCLUSIONS

Longitudinal self-care behaviours pattern trajectories of heart failure patients were stratified as high-stable and low-sustained. Routine follow-up assessment of patients' self-care behavioural patterns, including anaemia and frailty, and cognitive function can minimise unplanned hospital readmissions.

RELEVANCE TO CLINICAL PRACTICE

Identification of trajectory patterns of self-care behaviours over time and provision of timely and individualised care can reduce readmissions for heart failure patients. Healthcare professionals should recognise the significance of developing tailored strategies incorporating longitudinal self-care behavioural patterns in heart failure patients.

REPORTING METHOD

The study has been reported in accordance with the STROBE checklist (Appendix S1).

PATIENT OR PUBLIC CONTRIBUTION

Patients have completed a self-reported questionnaire after providing informed consent.

Hierarchical Development of Physical Frailty and Cognitive Impairment and Their Association With Incident Cardiovascular Disease

BACKGROUND

Frailty and cognitive impairment (CI) are geriatric conditions that lead to poor health outcomes among older adults with cardiovascular disease. The association between their temporal patterns of development and cardiovascular risk is unknown.

OBJECTIVES

This study aims to examine the 5-year cardiovascular outcomes by the pattern of development of frailty and CI in older adults without a history of coronary artery disease.

METHODS

We used the National Health and Aging Trends Study, linked to Medicare data. Frailty was measured using the physical frailty phenotype. CI was measured using the AD8 Dementia Screening Interview, measured cognitive performance, or self-report by patient or caregiver for a diagnosis given by a physician. The primary outcome was incident major adverse cardiovascular event at 5 years.

RESULTS

Of a total 2,189 study participants aged 65 and older, 38.5% were male. In this study population, 154 (7%) participants developed frailty first, 829 (38%) developed CI first, and 195 (9%) participants developed both simultaneously (frail-CI group). Those who developed frailty and CI simultaneously were older, more likely to be female, and had multiple chronic conditions. The frail-CI group had the highest risk of major adverse cardiovascular event (hazard ratio [HR]: 1.81; 95% CI: 1.47-2.23) followed by frail first (HR: 1.46; 95% CI: 1.17-1.81) and CI first (HR: 1.31; 95% CI: 1.15-1.50). Frailty first was associated with the greater risk of stroke (HR: 1.49; 95% CI: 1.06-2.09) compared to the intact group.

CONCLUSIONS

The simultaneous development of frailty and CI is associated with an increased risk of adverse cardiovascular outcomes including death compared with the development of each syndrome alone. Diagnostics to detect frailty and CI are critical in assessment of cardiovascular risk in the older population.

Prevalence of cognitive frailty among older adults in China: a systematic review and meta-analysis

OBJECTIVE

This study aimed to investigate the prevalence of cognitive frailty among older adults in China.

DESIGN

Systematic review and meta-analysis.

METHODS

We searched the Cochrane Library, PubMed, Web of Science, Embase, China National Knowledge Infrastructure(CNKI), Wanfang, Chinese Biomedical Literature and Weipu (VIP) databases to collect information on the epidemiology of cognitive frailty among older adults in China. The study period was from the establishment of the database to March 2022. Two researchers independently screened the literature, extracted the data and assessed the risk of bias in the included studies. All statistical analyses were performed using Stata V.15.0.

RESULTS

We screened 522 records, of which 28 met the inclusion criteria. The results of the meta-analysis showed that the prevalence of cognitive frailty among older adults in China was 15%(95%CI (0.13%,0.17%)). The prevalence of cognitive frailty was higher in hospitals and nursing homes than in communities. Moreover, the prevalence of cognitive frailty was higher in women than in men. Furthermore, the prevalence rates of cognitive frailty in North China Hospital, older adults aged≥80 years, and illiterate individuals were 25%, 29%, and 55%, respectively.

CONCLUSIONS

In conclusion, in China, the prevalence of cognitive frailty is higher among older adults, is higher in women than in men, is higher in hospitals and nursing homes than in communities, and is higher in North China than other regions. Moreover, the higher the educational level, the lower the prevalence of cognitive frailty. Multimodal interventions for cognitive frailty, including increased exercise, nutritional support, increased socialisation opportunities and multifactorial strategies, may be effective in preventing cognitive frailty. These findings have important implications for adjusting healthcare and social care systems.

PROSPERO REGISTRATION NUMBER

CRD42023390486.

The concurrent impact of mild cognitive impairment and frailty syndrome in heart failure

Pathological processes associated with ageing increase the risk of cognitive deficits and dementia. Frailty syndrome, also known as weakness or reserve depletion syndrome, may significantly accelerate these pathological processes in the elderly population. Frailty syndrome is characterized by decreased physiological function and neuropsychiatric symptoms, including cognitive decline and depressive states. In people with cardiovascular disease, the risk of frailty is 3 times higher. Frailty syndrome is particularly prevalent in severe heart failure, which increases the risk of mortality, increases hospital readmission, and reduces patients' quality of life. In addition, co-occurrence of cognitive impairment and frailty syndrome significantly increases the risk of dementia and other adverse outcomes, including mortality, in the heart failure population.

Structural Relationships Between Cognitive Function, Depressive Symptoms, Self-Care Confidence, and Maintenance in Patients With Heart Failure

Introduction

In order to promote self-care maintenance behavior in patients with heart failure (HF), it is necessary to identify the direct and indirect effects of major latent variables.

Objective

This study aimed to identify structural relationships between different domains of cognitive function, depression and self-care confidence, and self-care maintenance.

Methods

This descriptive study involved a secondary analysis using data of 201 patients with HF from two observational studies in three hospitals in Korea. The structural equation model using AMOS version 24.0 was constructed to assess the relationships among the variables. The Seoul Neuropsychological Screening Battery was used to assess global cognition, immediate/delayed memory, and executive function, and the Self-Care of HF Index v.6.2. was used for self-care confidence and maintenance.

Results

Self-care maintenance was affected by memory function with a significant direct effect (β=.43, p = .006), as well as self-care confidence (β=.70, p < .001). Memory function and global function indirectly affected self-care maintenance through self-care confidence (β = -.37, p = .002; β = .14, p = .030). Depressive symptoms also had an indirect effect through self-care confidence on self-care maintenance (β = -.21, p = .005).

Conclusion

This study confirmed that it is important to increase self-care confidence through supportive care and to maintain memory function for maintaining self-care in the chronic course of HF patients. In particular, this study suggests that it is necessary to perform periodic memory check-ups for chronic HF patients on an outpatient basis, and counseling and education are needed to improve memory and increase confidence in self-care.

Cognitive Dysfunction in Heart Failure: Pathophysiology and Implications for Patient Management

PURPOSE OF REVIEW

There is increasing recognition of the prevalence and impact of cognitive dysfunction (CD) in heart failure (HF) patients. This contemporary review appraises the evidence for epidemiological association, direct pathophysiological links and emerging pharmacological and non-pharmacological interventions. Furthermore, we present evidence for care models that aim to mitigate the morbidity and poor quality of life associated with these dual processes and propose future work to improve outcomes.

RECENT FINDINGS

CD disproportionately affects heart failure patients, even accounting for known comorbid risk factors, and this may extend to subclinical left ventricular dysfunction. Neuroimaging studies now provide evidence of anatomical and functional differences which support previously postulated mechanisms of reduced cerebral blood flow, micro-embolism and systemic inflammation. Interventions such as multidisciplinary ambulatory HF care, education and memory training improve HF outcomes perhaps to a greater degree in those with comorbid CD. Additionally, optimisation of standard heart failure care (cardiac rehabilitation, pharmacological and device therapy) may lead to additional cognitive benefits. Epidemiological, neuroimaging and intervention studies provide evidence for the causal association between HF and CD, although evidence for Alzheimer's dementia is less certain. Specific reporting of cognitive outcomes in HF trials and evaluation of targeted interventions is required to further guide care provision.

Neural Dysconnectivity in the Hippocampus Correlates With White Matter Lesions and Cognitive Measures in Patients With Coronary Artery Disease

Purpose

Recent neuroimaging reports have shown the microstructural changes in coronary artery disease (CAD) and its correlation with cognitive dysfunction while little is known about the functional characteristics of CAD. We hypothesize that functional characteristics may give clues to underlying pathology in CAD and its link with cognitive dysfunction. Degree centrality (DC), a graph-based assessment of network organization was performed to explore the neural connectivity changes in CAD patients compared with healthy controls and their correlation with cognitive measures.

Methods

Thirty CAD patients and 36 healthy controls were included in our study. All participants underwent functional magnetic resonance imaging (fMRI) of the brain. We performed DC analysis to identify voxels that showed changes in whole-brain functional connectivity with other voxels. DC was measured by the fMRI graph method and comparisons between the two groups were done. All participants underwent neuropsychological assessment (Montreal Cognitive Assessment, MoCA and Mini-Mental State Examination, MMSE).

Results

Our data analysis included 30 CAD patients (59.90 ± 7.53 years) and 36 HCs (61.61 ± 6.19 years). CAD patients showed a greater prevalence of white matter lesions using the Fazekas score than healthy controls (P &lt; 0.001). Importantly, CAD patients showed significantly lower (P &lt; 0.001) MoCA and MMSE scores compared with healthy controls. CAD patients showed significantly decreased DC value (P &lt; 0.001) in the right hippocampus (hippocampus_R), right lingual gyrus (lingual_R), and significantly increased DC value (P &lt; 0.001) in the left middle frontal gyrus (Frontal_Mid_L) when compared with healthy controls respectively. DC value in the hippocampus_R significantly correlated (P &lt; 0.00) with MMSE and MoCA scores in CAD patients. Fazekas scores in CAD patients showed a significant correlation (P &lt; 0.001) with the DC value in the hippocampus_R.

Conclusion

These findings suggest that reduced cerebral neural connectivity in CAD may contribute to their cognitive impairment and white matter microstructural damage.