Mild cognitive impairment in patients with acute heart failure does not limit the effectiveness of early phase II cardiac rehabilitation

Effect of cognitive impairment at admission on activities of daily living at discharge in older patients with heart failure

Nonaka Y, Fujii R, Tanaka S, Tabira K. Effect of cognitive impairment at admission on activities of daily living at discharge in older patients with heart failure. Jpn J Compr Rehabil Sci 2023; 14: 78‒83.

Objective

Hasegawa's Dementia Scale-Revised (HDS-R) is widely used as a screening test for cognitive function in older adults. In this study, we examined the effect of cognitive impairment (CI) at admission on activities of daily living (ADL) at discharge in older patients with heart failure (HF).

Methods

This retrospective observational study included 394 patients hospitalized for acute decompensated HF between April 2016 and December 2022. Data on age, sex, body mass index, length of hospital stay, initiation of rehabilitation, New York Heart Association (NYHA) class, Charlson Comorbidity Index, medication, brain natriuretic peptide levels, left ventricular ejection fraction, renal function, hemoglobin level, serum albumin level, Geriatric Nutritional Risk Index (GNRI), Barthel Index (BI), and HDS-R score were analyzed using the χ2 test, unpaired t test, Mann-Whitney U test, and multiple linear regression.

Results

Among 394 patients, 102 who met the final inclusion criteria were included in the study. Based on previous studies, patients were divided into a high BI group (N = 44) and a low BI group (N = 58). Multiple linear regression analysis showed that CI at admission independently affected BI at discharge even after adjusting for confounding effects of age, NYHA class, GNRI, and BI at admission.

Conclusions

Our study showed that the presence or absence of CI may influence ADL improvement in rehabilitation interventions aimed at improving ADL in older patients with HF.

Effects of Exercise Training on Cognitive Function in Individuals With Heart Failure: A Meta-Analysis

OBJECTIVE

Cognitive function is critical for disease self-management; however, it is poorer in individuals with heart failure (HF) than in age-matched people who are healthy. Aging and disease progression collectively threaten the cognitive function of individuals with HF. Exercise has been shown to improve the mobility and mortality risk factors of this population, but the effects of exercise on the cognitive function of individuals with HF are unclear. This meta-analysis aimed to examine these potential effects.

METHODS

A systematic literature search was conducted in PubMed, MEDLINE, CINAHL, Cochrane Library, Physiotherapy Evidence Database, and ClinicalKey on literature published until January 2022. Studies examining the effects of exercise training on cognitive function in individuals with HF were included. Characteristics of participants and details of interventions were extracted. Effects of exercise training on global cognitive function, attention, and executive function were analyzed using the Comprehensive Meta-Analysis software.

RESULTS

Six studies were included. Individuals with chronic HF were examined in most studies. The average ejection fraction of participants was 23 to 46%. Aerobic exercise was used in most studies. All included studies had exercise frequency of 2 to 3 times per week and a duration of 30 to 60 minutes per session for 12 to 18 weeks. Compared with the control group, exercise training benefited the global cognitive function of individuals with HF and cognitive impairments (standardized mean difference = 0.44; 95% CI = 0.01-0.87). The attention of individuals with HF improved after exercise training compared with that before the intervention.

CONCLUSION

Exercise may improve cognitive function in individuals with HF and cognitive impairments. However, due to large heterogeneity in the study design, more studies are needed to support clinical application.

IMPACT

These findings should raise clinicians' awareness about the role of exercise on the cognitive function of individuals with HF, in addition to benefits in physical domains.

Prognostic implications of six-minute walking distance in patients with heart failure with preserved ejection fraction

BACKGROUND

The incremental prognostic value of the six-minute walking test over conventional risk factors has not been evaluated in an adequate number of patients with heart failure with preserved ejection fraction (HFpEF). Therefore, we aimed to examine its prognostic significance using data from the FRAGILE-HF study.

METHODS AND RESULTS

A total of 513 older patients who were hospitalized for worsening heart failure were examined. Patients were classified according to the tertiles of six-minute walking distance (6MWD): T1 (<166 m), T2 (166-285 m), and T3 (≥285 m). During the 2-year follow-up period after discharge, 90 all-cause deaths occurred. Kaplan-Meier curves showed that the T1 group had significantly higher event rates than the other groups (log-rank p = 0.007). Cox proportional hazard analysis revealed that the T1 group was independently associated with lower survival, even after adjusting for conventional risk factors (T3: hazard ratio 1.79, 95% confidence interval 1.02-3.14, p = 0.042). The addition of the 6MWD to the conventional prognostic model showed a statistically significant incremental prognostic value (net reclassification improvement 0.27, 95% confidence interval 0.04-0.49; p = 0.019).

CONCLUSIONS

The 6MWD is associated with survival in patients with HFpEF and has an incremental prognostic value over conventional well-validated risk factors.