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Exercise-based cardiac rehabilitation in patients with reduced left ventricular ejection fraction: The Cardiac Rehabilitation Outcome Study in Heart Failure (CROS-HF): A systematic review and meta-analysis.

ABSTRACT: BACKGROUND:In heart failure with reduced left ventricular ejection fraction (HFrEF) patients the effects of exercise-based cardiac rehabilitation on top of state-of-the-art pharmacological and device therapy on mortality, hospitalization, exercise capacity and quality-of-life are not well established. DESIGN:The design of this study involved a structured review and meta-analysis. METHODS:Evaluation of randomised controlled trials of exercise-based cardiac rehabilitation in HFrEF-patients with left ventricular ejection fraction ?40% of any aetiology with a follow-up of ?6 months published in 1999 or later. RESULTS:Out of 12,229 abstracts, 25 randomised controlled trials including 4481 HFrEF-patients were included in the final evaluation. Heterogeneity in study population, study design and exercise-based cardiac rehabilitation-intervention was evident. No significant difference in the effect of exercise-based cardiac rehabilitation on mortality compared to control-group was found (hazard ratio 0.75, 95% confidence interval 0.39-1.41, four studies; 12-months follow-up: relative risk 1.29, 95% confidence interval 0.66-2.49, eight studies; six-months follow-up: relative risk 0.91, 95% confidence interval 0.26-3.16, seven studies). In addition there was no significant difference between the groups with respect to 'hospitalization-for-any-reason' (12-months follow-up: relative risk 0.79, 95% confidence interval 0.41-1.53, four studies), or 'hospitalization-due-to-heart-failure' (12-months follow-up: relative risk 0.59, 95% confidence interval 0.12-2.91, four studies; six-months follow-up: relative risk 0.84, 95% confidence interval 0.07-9.71, three studies). All studies show improvement of exercise capacity. Participation in exercise-based cardiac rehabilitation significantly improved quality-of-life as evaluated with the Kansas City Cardiomyopathy Questionnaire: (six-months follow-up: mean difference 1.94, 95% confidence interval 0.35-3.56, two studies), but no significant results emerged for quality-of-life measured by the Minnesota Living with Heart Failure Questionnaire (nine-months or more follow-up: mean difference -4.19, 95% confidence interval -10.51-2.12, seven studies; six-months follow-up: mean difference -5.97, 95% confidence interval -16.17-4.23, four studies). CONCLUSION:No association between exercise-based cardiac rehabilitation and mortality or hospitalisation could be observed in HFrEF patients but exercise-based cardiac rehabilitation is likely to improve exercise capacity and quality of life.

SUBMITTER: Bjarnason-Wehrens B

PROVIDER: S-EPMC7272131 | biostudies-literature | 2020 Jun

REPOSITORIES: biostudies-literature

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Exercise-based cardiac rehabilitation in patients with reduced left ventricular ejection fraction: The Cardiac Rehabilitation Outcome Study in Heart Failure (CROS-HF): A systematic review and meta-analysis.

Bjarnason-Wehrens Birna B Nebel R R Jensen K K Hackbusch M M Grilli M M Gielen S S Schwaab B B Rauch B B

European journal of preventive cardiology 20190608 9

<h4>Background</h4>In heart failure with reduced left ventricular ejection fraction (HFrEF) patients the effects of exercise-based cardiac rehabilitation on top of state-of-the-art pharmacological and device therapy on mortality, hospitalization, exercise capacity and quality-of-life are not well established.<h4>Design</h4>The design of this study involved a structured review and meta-analysis.<h4>Methods</h4>Evaluation of randomised controlled trials of exercise-based cardiac rehabilitation in ...[more]

PMID: 31177833

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Project description:Background Trastuzumab is life-extending therapy for breast cancer patients overexpressing the human epidermal growth factor receptor 2 ( HER 2+), but has known cardiotoxic risk. We sought to determine if trastuzumab can be administered to patients with reduced baseline cardiac function at no higher cardiotoxicity risk than in those with normal cardiac function at baseline. Methods and Results We performed a retrospective study of women treated with trastuzumab for human epidermal growth factor receptor 2 breast cancer at Mayo Clinic Rochester between January 1, 2000 and August 31, 2015 with pre- and on-therapy echocardiograms available for review. A left ventricular ejection fraction (LVEF) <53% was considered abnormal, and a ≥10% decline in LVEF as evidence of cardiotoxicity based on the criteria of the American Society of Echocardiography. A total of 428 women were identified; 408 had a normal cardiac function ( LVEF 63.4±5%) and 20 had an impaired cardiac function ( LVEF 45.4±7%) before trastuzumab. Seven women (35%) with reduced LVEF at baseline had a ≥10% reduction in LVEF , compared with 179 (43.9%) of those with normal LVEF before trastuzumab initiation ( P= NS ). Symptomatic heart failure developed more often in patients with reduced versus normal baseline LVEF (25% versus 4.2%, P<0.05). After adjusting for patient age and breast cancer disease stage, survival rates over 5 years from time of diagnosis were found to be lower for patients with reduced baseline LVEF compared with patients with normal baseline LVEF ( P<0.001); the adjusted proportion of patients surviving at 5 years for those with low LVEF at baseline was 79% and for those with normal LVEF was 93%. Conclusions Women undergoing trastuzumab therapy for breast cancer with impaired baseline cardiac function experience no higher risk of LVEF decline, but more frequently develop symptomatic heart failure. While trastuzumab could be considered, these patients should be co-managed by a cardiologist.

Project description:AIMS:Neuregulin1-? (NRG1-?) is released from microvascular endothelial cells in response to inflammation with compensatory cardioprotective effects. Circulating NRG1-? is elevated in heart failure (HF) with reduced ejection fraction (HFrEF) but not studied in HF with preserved EF (HFpEF). METHODS AND RESULTS:Circulating NRG1-? was quantified in 86 stable patients with HFpEF (EF ?45% and N-terminal pro-brain natriuretic peptide >300 ng/L), in 86 patients with HFrEF prior to and after left ventricular assist device (LVAD) and/or heart transplantation (HTx) and in 21 healthy controls. Association between NRG1-? and the composite outcome of all-cause mortality/HF hospitalization in HFpEF and all-cause mortality/HTx/LVAD implantation in HFrEF with and without ischaemia assessed as macrovascular coronary artery disease was assessed. In HFpEF, median (25th-75th percentile) NRG1-? was 6.5 (2.1-11.3) ng/mL; in HFrEF, 3.6 (2.1-7.6) ng/mL (P = 0.035); after LVAD, 1.7 (0.9-3.6) ng/mL; after HTx 2.1 (1.4-3.6) ng/mL (overall P < 0.001); and in controls, 29.0 (23.1-34.3) ng/mL (P = 0.001). In HFrEF, higher NRG1-? was associated with worse outcomes (hazard ratio per log increase 1.45, 95% confidence interval 1.04-2.03, P = 0.029), regardless of ischaemia. In HFpEF, the association of NRG1-? with outcomes was modified by ischaemia (log-rank P = 0.020; Pinteraction = 0.553) such that only in ischaemic patients, higher NRG1-? was related to worse outcomes. In contrast, in patients without ischaemia, higher NRG1-? trended towards better outcomes (hazard ratio 0.71, 95% confidence interval 0.48-1.05, P = 0.085). CONCLUSIONS:Neuregulin1-? was reduced in HFpEF and further reduced in HFrEF. The opposing relationships of NRG1-? with outcomes in non-ischaemic HFpEF compared with HFrEF and ischaemic HFpEF may indicate compensatory increases of cardioprotective NRG1-? from microvascular endothelial dysfunction in the former (non-ischaemic HFpEF), but this compensatory mechanism is overwhelmed by the presence of ischaemia in the latter (HFrEF and ischaemic HFpEF).

Dataset Information

Exercise-based cardiac rehabilitation in patients with reduced left ventricular ejection fraction: The Cardiac Rehabilitation Outcome Study in Heart Failure (CROS-HF): A systematic review and meta-analysis.

Publications

Exercise-based cardiac rehabilitation in patients with reduced left ventricular ejection fraction: The Cardiac Rehabilitation Outcome Study in Heart Failure (CROS-HF): A systematic review and meta-analysis.

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