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Fuertes-Kenneally L, Manresa-Rocamora A, Blasco-Peris C, Ribeiro F, Sempere-Ruiz N, Sarabia JM, Climent-Paya V. Effects and Optimal Dose of Exercise on Endothelial Function in Patients with Heart Failure: A Systematic Review and Meta-Analysis. SPORTS MEDICINE - OPEN 2023; 9:8. [PMID: 36739344 PMCID: PMC9899305 DOI: 10.1186/s40798-023-00553-z] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 06/20/2022] [Accepted: 01/17/2023] [Indexed: 02/05/2023]
Abstract
BACKGROUND Exercise-based cardiac rehabilitation (CR) is considered an effective treatment for enhancing endothelial function in patients with heart failure (HF). However, recent studies have been published and the optimal "dose" of exercise required to increase the benefits of exercise-based CR programmes on endothelial function is still unknown. OBJECTIVES (a) To estimate the effect of exercise-based CR on endothelial function, assessed by flow-mediated dilation (FMD), in patients with HF; (b) to determine whether high-intensity interval training (HIIT) is better than moderate-intensity training (MIT) for improving FMD; and (c) to investigate the influence of exercise modality (i.e. resistance exercise vs. aerobic exercise and combined exercise vs. aerobic exercise) on the improvement of endothelial function. METHODS Electronic searches were carried out in PubMed, Embase, and Scopus up to February 2022. Random-effects models of between-group mean differences were estimated. Heterogeneity analyses were performed by means of the chi-square test and I2 index. Subgroup analyses and meta-regressions were used to test the influence of potential moderator variables on the effect of exercise. RESULTS We found a FMD increase of 3.09% (95% confidence interval [CI] = 2.01, 4.17) in favour of aerobic-based CR programmes compared with control groups in patients with HF and reduced ejection fraction (HFrEF). However, the results of included studies were inconsistent (p < .001; I2 = 95.2%). Higher FMD improvement was found in studies which were randomised, reported radial FMD, or performed higher number of training sessions a week. Moreover, HIIT enhanced FMD to a greater extent than MIT (2.35% [95% CI = 0.49, 4.22]) in patients with HFrEF. Insufficient data prevented pooled analyses for the effect of exercise in patients with HF and preserved ejection fraction and the influence of exercise modality on the improvement of endothelial function. CONCLUSION Aerobic-based CR is a non-pharmacological treatment for enhancing endothelial function in patients with HFrEF. However, higher training frequency and HIIT induce greater adaptation of endothelial function in these patients, which should betaken into consideration when designing exercise-based CR programmes. Trial registration The protocol was prospectively registered on the PROSPERO database (CRD42022304687).
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Affiliation(s)
- Laura Fuertes-Kenneally
- grid.513062.30000 0004 8516 8274Institute for Health and Biomedical Research of Alicante (ISABIAL), 03010 Alicante, Spain ,Cardiology Department, Alicante General University Hospital (HGUA), 03010 Alicante, Spain
| | - Agustín Manresa-Rocamora
- grid.513062.30000 0004 8516 8274Institute for Health and Biomedical Research of Alicante (ISABIAL), 03010 Alicante, Spain ,grid.26811.3c0000 0001 0586 4893Department of Sport Sciences, Sports Research Centre, Miguel Hernández University of Elche, 03202 Elche, Spain
| | - Carles Blasco-Peris
- grid.513062.30000 0004 8516 8274Institute for Health and Biomedical Research of Alicante (ISABIAL), 03010 Alicante, Spain ,grid.5338.d0000 0001 2173 938XDepartment of Physical Education and Sport, University of Valencia, 46010 Valencia, Spain
| | - Fernando Ribeiro
- grid.7311.40000000123236065Institute of Biomedicine‑iBiMED and School of Health Sciences, University of Aveiro, 3810-193 Aveiro, Portugal
| | - Noemí Sempere-Ruiz
- grid.513062.30000 0004 8516 8274Institute for Health and Biomedical Research of Alicante (ISABIAL), 03010 Alicante, Spain ,grid.26811.3c0000 0001 0586 4893Department of Sport Sciences, Sports Research Centre, Miguel Hernández University of Elche, 03202 Elche, Spain
| | - José Manuel Sarabia
- grid.513062.30000 0004 8516 8274Institute for Health and Biomedical Research of Alicante (ISABIAL), 03010 Alicante, Spain ,grid.26811.3c0000 0001 0586 4893Department of Sport Sciences, Sports Research Centre, Miguel Hernández University of Elche, 03202 Elche, Spain
| | - Vicente Climent-Paya
- grid.513062.30000 0004 8516 8274Institute for Health and Biomedical Research of Alicante (ISABIAL), 03010 Alicante, Spain ,Cardiology Department, Alicante General University Hospital (HGUA), 03010 Alicante, Spain
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2
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Wouters P, Schoots T, Niemeijer V, Spee RF, Kemps H. Does recovery from submaximal exercise predict response to cardiac resynchronisation therapy? Open Heart 2022; 9:openhrt-2022-002047. [PMID: 36376007 PMCID: PMC9664270 DOI: 10.1136/openhrt-2022-002047] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/27/2022] [Accepted: 10/19/2022] [Indexed: 11/16/2022] Open
Abstract
Background Exercise parameters are not routinely incorporated in decision making for cardiac resynchronisation therapy (CRT). Submaximal exercise parameters better reflect daily functional capacity of heart failure patients than parameters measured at maximal exertion, and may therefore better predict response to CRT. We compared various exercise parameters, and sought to establish which best predict CRT response. Methods In 31 patients with chronic heart failure (61% male; age 68±7 years), submaximal and maximal cycling testing was performed before and 3 months after CRT. Submaximal oxygen onset (τVO2 onset) and recovery kinetics (τVO2 recovery), peak oxygen uptake (VO2 peak) and oxygen uptake efficiency slope (OUES) where measured. Response was defined as ≥15% relative reduction in end-systolic volume. Results After controlling for age, New York Heart Association and VO2 peak, fast submaximal VO2 kinetics were significantly associated with response to CRT, measured either during onset or recovery of submaximal exercise (area under the curve, AUC=0.719 for both; p<0.05). By contrast, VO2 peak (AUC=0.632; p=0.199) and OUES (AUC=0.577; p=0.469) were not associated with response. Among patients with fast onset and recovery kinetics, below 60 s, a significantly higher percentage of responders was observed (91% and 92% vs 43% and 40%, respectively). Conclusions Impaired VO2 kinetics may serve as an objective marker of submaximal exercise capacity that is age-independently associated with non-response following CRT, whereas maximal exercise parameters are not. Assessment of VO2 kinetics is feasible and easy to perform, but larger studies should confirm their clinical utility.
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Affiliation(s)
- Philippe Wouters
- Department of Cardiology, Máxima Medisch Centrum, Eindhoven, The Netherlands .,Department of Cardiology, University Medical Centre, Utrecht, The Netherlands
| | - Thijs Schoots
- Department of Cardiology, Máxima Medisch Centrum, Eindhoven, The Netherlands.,Technical University of Eindhoven, Eindhoven, The Netherlands
| | - Victor Niemeijer
- Department of Sports Medicine, Elkerliek Hospital, Helmond, The Netherlands
| | - Ruud F Spee
- Department of Cardiology, Máxima Medisch Centrum, Eindhoven, The Netherlands
| | - Hareld Kemps
- Department of Cardiology, Máxima Medisch Centrum, Eindhoven, The Netherlands.,Technical University of Eindhoven, Eindhoven, The Netherlands
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3
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Chen J, Gu S, Song Y, Ji X, Zeng W, Wang X, Wang Y, Feng Q. The impact of cardiomotor rehabilitation on endothelial function in elderly patients with chronic heart failure. BMC Cardiovasc Disord 2021; 21:524. [PMID: 34724901 PMCID: PMC8561974 DOI: 10.1186/s12872-021-02327-5] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/09/2020] [Accepted: 09/27/2021] [Indexed: 12/19/2022] Open
Abstract
Background To explore the effects of cardiac exercise rehabilitation on peripheral blood endothelial progenitor cells (EPC) in elderly patients with chronic heart failure. Methods 80 elderly patients with chronic heart failure were selected from March 2017 to March 2019 and randomly divided into two groups (N = 40). The control group was treated routinely and walked freely for 30–60 min every day. The patients in the exercise rehabilitation group developed a cardiac exercise rehabilitation plan. Then, cardiac function and peripheral blood B-natriuretic peptide (BNP) levels in the two groups were compared. The cell viability, proliferation, apoptosis, and invasion ability of EPCs were detected. The levels of the PI3K/AKT pathway and eNOS and VEGF were compared. Results There were no significant differences in all indexes between the two groups before treatment (P > 0.05), and both improved significantly after treatment (P < 0.05). After treatment, LVEF and LVFS in the exercise rehabilitation group were significantly higher than those in the control group (P < 0.05), and LVEDD and LVESD were significantly lower than those in the control group (P < 0.05). The BNP level in the exercise rehabilitation group was significantly lower than that in the control group (P < 0.05). The cell viability, proliferation, invasion ability of EPC, and the levels of PI3K, AKT, eNOS, and VEGF mRNA and protein in the exercise rehabilitation group were significantly higher than those in the control group. Apoptosis rate was significantly lower than those in the control group (P < 0.05). Conclusions Visceral exercise rehabilitation can improve cardiac ejection and myocardial function in elderly patients with chronic heart failure, and can promote the vitality, proliferation, and invasion of peripheral blood EPC, and promote the expression of eNOS and VEGF by upregulating the PI3K/AKT pathway to promote angiogenesis and endothelial function. Supplementary Information The online version contains supplementary material available at 10.1186/s12872-021-02327-5.
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Affiliation(s)
- Juming Chen
- Department of General Practice, The First Affiliated Hospital of Hainan Medical University, Haikou City, 570102, Hainan Province, China
| | - Shenhong Gu
- Department of General Practice, The First Affiliated Hospital of Hainan Medical University, Haikou City, 570102, Hainan Province, China.
| | - Yanling Song
- Department of General Practice, The First Affiliated Hospital of Hainan Medical University, Haikou City, 570102, Hainan Province, China
| | - Xinbo Ji
- Department of General Practice, The First Affiliated Hospital of Hainan Medical University, Haikou City, 570102, Hainan Province, China
| | - Wangyuan Zeng
- Department of General Practice, The First Affiliated Hospital of Hainan Medical University, Haikou City, 570102, Hainan Province, China
| | - Xiaoxi Wang
- Department of General Practice, The First Affiliated Hospital of Hainan Medical University, Haikou City, 570102, Hainan Province, China
| | - Yachun Wang
- Department of General Practice, The First Affiliated Hospital of Hainan Medical University, Haikou City, 570102, Hainan Province, China
| | - Qingfeng Feng
- Graduate School, Hainan Medical University, China Medical University, Haikou City, 571199, Hainan Province, China
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Cardiorespiratory Fitness Mediates Cognitive Performance in Chronic Heart Failure Patients and Heart Transplant Recipients. INTERNATIONAL JOURNAL OF ENVIRONMENTAL RESEARCH AND PUBLIC HEALTH 2020; 17:ijerph17228591. [PMID: 33228046 PMCID: PMC7699401 DOI: 10.3390/ijerph17228591] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 10/02/2020] [Revised: 11/11/2020] [Accepted: 11/13/2020] [Indexed: 12/19/2022]
Abstract
We compared cognitive profiles in chronic heart failure patients (HF), heart transplant recipients (HT) and healthy controls (HC) and examined the relationship between cardiorespiratory fitness (V˙O2peak), peak cardiac output (COpeak) and cognitive performance. Stable HT patients (n = 11), HF patients (n = 11) and HC (n = 13) (61.5 ± 8.5 years) were recruited. Four cognitive composite scores targeting different cognitive functions were computed from neuropsychological tests: working memory, processing speed, executive functions and verbal memory. Processing speed and executive function scores were higher, which indicates lower performances in HF and HT compared to HC (p < 0.05). V˙O2peak and first ventilatory threshold (VT1) were lower in HF and HT vs. HC (p < 0.01). COpeak was lower in HF vs. HT and HC (p < 0.01). Processing speed, executive function and verbal memory performances were correlated with V˙O2peak, VT1 and peak cardiac hemodynamics (p < 0.05). Mediation analyses showed that V˙O2peak and VT1 mediated the relationship between group and processing speed and executive function performances in HF and HT. COpeak fully mediated executive function and processing speed performances in HF only. V˙O2peak and COpeak were related to cognitive performance in the entire sample. In addition, V˙O2peak and VT1 fully mediated the relationship between group and executive function and processing speed performances.
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5
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Takada S, Sabe H, Kinugawa S. Abnormalities of Skeletal Muscle, Adipocyte Tissue, and Lipid Metabolism in Heart Failure: Practical Therapeutic Targets. Front Cardiovasc Med 2020; 7:79. [PMID: 32478098 PMCID: PMC7235191 DOI: 10.3389/fcvm.2020.00079] [Citation(s) in RCA: 16] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/27/2020] [Accepted: 04/15/2020] [Indexed: 12/21/2022] Open
Abstract
Chronic diseases, including heart failure (HF), are often accompanied with skeletal muscle abnormalities in both quality and quantity, which are the major cause of impairment of the activities of daily living and quality of life. We have shown that skeletal muscle abnormalities are a hallmark of HF, in which metabolic pathways involving phosphocreatine and fatty acids are largely affected. Not only in HF, but the dysfunction of fatty acid metabolism may also occur in many chronic diseases, such as arteriosclerosis, as well as through insufficient physical exercise. Decreased fatty acid catabolism affects adenosine triphosphate (ATP) production in mitochondria, via decreased activity of the tricarboxylic acid cycle; and may cause abnormal accumulation of adipose tissue accompanied with hyperoxidation and ectopic lipid deposition. Such impairments of lipid metabolism are in turn detrimental to skeletal muscle, which is hence a chicken-and-egg problem between skeletal muscle and HF. In this review, we first discuss skeletal muscle abnormalities in HF, including sarcopenia; particularly their association with lipid metabolism and adipose tissue. On the other hand, the precise mechanisms involved in metabolic reprogramming and dysfunction are beginning to be understood, and an imbalance of daily nutritional intake of individuals has been found to be a causative factor for the development and worsening of HF. Physical exercise has long been known to be beneficial for the prevention and even treatment of HF. Again, the molecular mechanisms by which exercise promotes skeletal muscle as well as cardiac muscle functions are being clarified by recent studies. We propose that it is now the time to develop more “natural” methods to prevent and treat HF, rather than merely relying on drugs and medical interventions. Further analysis of the basic design of and molecular mechanisms involved in the human body, particularly the inextricable association between physical exercise and the integrity and functional plasticity of skeletal and cardiac muscles is required.
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Affiliation(s)
- Shingo Takada
- Faculty of Lifelong Sport, Department of Sports Education, Hokusho University, Ebetsu, Japan.,Department of Molecular Biology, Hokkaido University Graduate School of Medicine, Sapporo, Japan
| | - Hisataka Sabe
- Department of Molecular Biology, Hokkaido University Graduate School of Medicine, Sapporo, Japan
| | - Shintaro Kinugawa
- Department of Cardiovascular Medicine, Hokkaido University Graduate School of Medicine, Sapporo, Japan
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6
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Collins SÉ, Phillips DB, McMurtry MS, Bryan TL, Paterson DI, Wong E, Ezekowitz JA, Forhan MA, Stickland MK. The Effect of Carotid Chemoreceptor Inhibition on Exercise Tolerance in Chronic Heart Failure. Front Physiol 2020; 11:195. [PMID: 32226392 PMCID: PMC7080702 DOI: 10.3389/fphys.2020.00195] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/23/2019] [Accepted: 02/20/2020] [Indexed: 12/14/2022] Open
Abstract
Purpose Chronic heart failure (CHF) is characterized by heightened sympathetic nervous activity, carotid chemoreceptor (CC) sensitivity, marked exercise intolerance and an exaggerated ventilatory response to exercise. The purpose of this study was to determine the effect of CC inhibition on exercise cardiovascular and ventilatory function, and exercise tolerance in health and CHF. Methods Twelve clinically stable, optimally treated patients with CHF (mean ejection fraction: 43 ± 2.5%) and 12 age- and sex-matched healthy controls were recruited. Participants completed two time-to-symptom-limitation (TLIM) constant load cycling exercise tests at 75% peak power output with either intravenous saline or low-dose dopamine (2 μg⋅kg–1⋅min–1; order randomized). Ventilation was measured using expired gas data and operating lung volume data were determined during exercise by inspiratory capacity maneuvers. Cardiac output was estimated using impedance cardiography, and vascular conductance was calculated as cardiac output/mean arterial pressure. Results There was no change in TLIM in either group with dopamine (CHF: saline 13.1 ± 2.4 vs. dopamine 13.5 ± 1.6 min, p = 0.78; Control: saline 10.3 ± 1.2 vs. dopamine 11.5 ± 1.3 min, p = 0.16). In CHF patients, dopamine increased cardiac output (p = 0.03), vascular conductance (p = 0.01) and oxygen delivery (p = 0.04) at TLIM, while ventilatory parameters were unaffected (p = 0.76). In controls, dopamine improved vascular conductance at TLIM (p = 0.03), but no other effects were observed. Conclusion Our findings suggest that the CC contributes to cardiovascular regulation during full-body exercise in patients with CHF, however, CC inhibition does not improve exercise tolerance.
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Affiliation(s)
- Sophie É Collins
- Division of Pulmonary Medicine, Faculty of Medicine and Dentistry, University of Alberta, Edmonton, AB, Canada.,Faculty of Rehabilitation Medicine, University of Alberta, Edmonton, AB, Canada
| | - Devin B Phillips
- Division of Pulmonary Medicine, Faculty of Medicine and Dentistry, University of Alberta, Edmonton, AB, Canada.,Faculty of Kinesiology, Sport, and Recreation, University of Alberta, Edmonton, AB, Canada
| | - M Sean McMurtry
- Division of Cardiology, Faculty of Medicine and Dentistry, University of Alberta, Edmonton, AB, Canada
| | - Tracey L Bryan
- Division of Pulmonary Medicine, Faculty of Medicine and Dentistry, University of Alberta, Edmonton, AB, Canada
| | - D Ian Paterson
- Division of Cardiology, Faculty of Medicine and Dentistry, University of Alberta, Edmonton, AB, Canada
| | - Eric Wong
- Division of Pulmonary Medicine, Faculty of Medicine and Dentistry, University of Alberta, Edmonton, AB, Canada
| | - Justin A Ezekowitz
- Division of Cardiology, Faculty of Medicine and Dentistry, University of Alberta, Edmonton, AB, Canada
| | - Mary A Forhan
- Faculty of Rehabilitation Medicine, University of Alberta, Edmonton, AB, Canada
| | - Michael K Stickland
- Division of Pulmonary Medicine, Faculty of Medicine and Dentistry, University of Alberta, Edmonton, AB, Canada.,G.F. MacDonald Centre for Lung Health, Covenant Health, Edmonton, AB, Canada
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7
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Shoemaker MJ, Dias KJ, Lefebvre KM, Heick JD, Collins SM. Physical Therapist Clinical Practice Guideline for the Management of Individuals With Heart Failure. Phys Ther 2020; 100:14-43. [PMID: 31972027 DOI: 10.1093/ptj/pzz127] [Citation(s) in RCA: 31] [Impact Index Per Article: 7.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/13/2019] [Revised: 04/15/2019] [Accepted: 06/10/2019] [Indexed: 12/12/2022]
Abstract
The American Physical Therapy Association (APTA), in conjunction with the Cardiovascular and Pulmonary Section of APTA, have commissioned the development of this clinical practice guideline to assist physical therapists in their clinical decision making when managing patients with heart failure. Physical therapists treat patients with varying degrees of impairments and limitations in activity and participation associated with heart failure pathology across the continuum of care. This document will guide physical therapist practice in the examination and treatment of patients with a known diagnosis of heart failure. The development of this clinical practice guideline followed a structured process and resulted in 9 key action statements to guide physical therapist practice. The level and quality of available evidence were graded based on specific criteria to determine the strength of each action statement. Clinical algorithms were developed to guide the physical therapist in appropriate clinical decision making. Physical therapists are encouraged to work collaboratively with other members of the health care team in implementing these action statements to improve the activity, participation, and quality of life in individuals with heart failure and reduce the incidence of heart failure-related re-admissions.
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Affiliation(s)
- Michael J Shoemaker
- Department of Physical Therapy, Grand Valley State University, 301 Michigan NE, Suite 200, Grand Rapids, MI 49503 (USA). Dr Shoemaker is a board-certified clinical specialist in geriatric physical therapy
| | - Konrad J Dias
- Physical Therapy Program, Maryville University of St Louis, St Louis, Missouri. Dr Dias is a board-certified clinical specialist in cardiovascular and pulmonary physical therapy
| | - Kristin M Lefebvre
- Department of Physical Therapy, Concordia University St Paul, St Paul, Minnesota. Dr Lefebvre is a board-certified clinical specialist in cardiovascular and pulmonary physical therapy
| | - John D Heick
- Department of Physical Therapy, Northern Arizona University, Flagstaff, Arizona. Dr Heick is a board-certified clinical specialist in orthopaedic physical therapy, neurologic physical therapy, and sports physical therapy
| | - Sean M Collins
- Physical Therapy Program, Plymouth State University, Plymouth, New Hampshire
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8
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Alem MM. Endothelial Dysfunction in Chronic Heart Failure: Assessment, Findings, Significance, and Potential Therapeutic Targets. Int J Mol Sci 2019; 20:E3198. [PMID: 31261886 PMCID: PMC6651535 DOI: 10.3390/ijms20133198] [Citation(s) in RCA: 59] [Impact Index Per Article: 11.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/19/2019] [Revised: 06/13/2019] [Accepted: 06/25/2019] [Indexed: 12/11/2022] Open
Abstract
Chronic heart failure (CHF) is a complex syndrome that results from structural and functional disturbances that affect the ability of the heart to supply oxygen to tissues. It largely affects and reduces the patient's quality of life, socio-economic status, and imposes great costs on health care systems worldwide. Endothelial dysfunction (ED) is a newly discovered phenomenon that contributes greatly to the pathophysiology of numerous cardiovascular conditions and commonly co-exists with chronic heart failure. However, the literature lacks clarity as to which heart failure patients might be affected, its significance in CHF patients, and its reversibility with pharmacological and non-pharmacological means. This review will emphasize all these points and summarize them for future researchers interested in vascular pathophysiology in this particular patient population. It will help to direct future studies for better characterization of these two phenomena for the potential discovery of therapeutic targets that might reduce future morbidity and mortality in this "at risk" population.
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Affiliation(s)
- Manal M Alem
- Department of Pharmacology, College of Clinical Pharmacy, Imam Abdulrahman Bin Faisal University, Dammam 31441, Saudi Arabia.
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9
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Matsumura N, Takahara S, Maayah ZH, Parajuli N, Byrne NJ, Shoieb SM, Soltys CLM, Beker DL, Masson G, El-Kadi AO, Dyck JR. Resveratrol improves cardiac function and exercise performance in MI-induced heart failure through the inhibition of cardiotoxic HETE metabolites. J Mol Cell Cardiol 2018; 125:162-173. [DOI: 10.1016/j.yjmcc.2018.10.023] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/27/2018] [Revised: 10/24/2018] [Accepted: 10/26/2018] [Indexed: 12/18/2022]
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10
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Fujiyoshi K, Yamaoka-Tojo M, Minami Y, Kutsuna T, Obara S, Kakizaki R, Nemoto T, Hashimoto T, Namba S, Shimohama T, Tojo T, Ako J. Endothelial Dysfunction Is Associated with Cognitive Impairment of Elderly Cardiovascular Disease Patients. Int Heart J 2018; 59:1034-1040. [DOI: 10.1536/ihj.17-610] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
Affiliation(s)
| | - Minako Yamaoka-Tojo
- Department of Rehabilitation, Kitasato University School of Allied Health Sciences
| | - Yoshiyasu Minami
- Department of Cardiovascular Medicine, Kitasato University School of Medicine
| | - Toshiki Kutsuna
- Department of Cardiac Rehabilitation, Kitasato University East Hospital
| | - Shinichi Obara
- Department of Cardiac Rehabilitation, Kitasato University East Hospital
| | | | | | | | - Sayaka Namba
- Department of Cardiovascular Medicine, Kitasato University School of Medicine
| | - Takao Shimohama
- Department of Cardiovascular Medicine, Kitasato University School of Medicine
| | - Taiki Tojo
- Department of Cardiovascular Medicine, Kitasato University School of Medicine
| | - Junya Ako
- Department of Cardiovascular Medicine, Kitasato University School of Medicine
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Cornelis J, Myers J, Heidbuchel H, Vrints C, Beckers P. Exercise Training in Heart Failure Patients With Persistent Atrial Fibrillation: a Practical Approach. Card Fail Rev 2018; 4:107-111. [PMID: 30206486 PMCID: PMC6125706 DOI: 10.15420/cfr.2018.19.2] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/30/2018] [Accepted: 07/06/2018] [Indexed: 12/25/2022] Open
Abstract
Persistent AF is present in at least 20 % of patients with chronic heart failure (CHF) and is related to a poor prognosis and more severe cardiac arrhythmias. CHF and AF share a common pathophysiology and can exacerbate one another. Exercise programmes for people with CHF have been shown to improve aerobic capacity, prognosis and quality of life. Given that patients with both CHF and AF show greater impairment in exercise performance, exercise training programmes have the potential to be highly beneficial. Optimal clinical evaluation using a cardiopulmonary exercise test should be performed before starting a training programme. Heart rate should be calculated over a longer period of time In patients with CHF and AF than those in sinus rhythm. The use of telemetry is advised to measure HR accurately during training. If telemetry is not available, patients can be safely trained based on the concomitant workload. An aerobic exercise training programme of moderate to high intensity, whether or not combined with strength training, is advised in patients with CHF and AF. Optimal training modalities and their intensity require further investigation.
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Affiliation(s)
- Justien Cornelis
- Department of Rehabilitation Sciences and Physiotherapy, University of AntwerpWilrijk, Belgium
| | - Jonathan Myers
- VA Palo Alto Health Care SystemPalo Alto, CA, USA
- Stanford UniversityStanford, CA, USA
| | - Hein Heidbuchel
- Department of Cardiology, Antwerp University HospitalEdegem, Belgium
- Department of Medicine, University of AntwerpWilrijk, Belgium
| | - Christiaan Vrints
- Department of Cardiology, Antwerp University HospitalEdegem, Belgium
- Department of Medicine, University of AntwerpWilrijk, Belgium
| | - Paul Beckers
- Department of Rehabilitation Sciences and Physiotherapy, University of AntwerpWilrijk, Belgium
- Department of Cardiology, Antwerp University HospitalEdegem, Belgium
- Department of Medicine, University of AntwerpWilrijk, Belgium
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12
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[Cardiac rehabilitation in heart failure]. Wien Med Wochenschr 2017; 168:23-30. [PMID: 28971286 DOI: 10.1007/s10354-017-0604-0] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/17/2017] [Accepted: 09/14/2017] [Indexed: 12/11/2022]
Abstract
Heart failure is a malignant disorder with increasing prevalence and a high socioeconomic impact. Sceletal muscle myopathy seems to play a key role in the development of exercise intolerance. Cardiac rehabilitation for heart failure mainly adresses training, namely moderate continuous endurance training or interval training in combination with resistance training, and is highly recommended in the current ESC-guidelines. Following a multimodal concept cardiac rehabilitation also implements optimisation of neurohumoral therapy, education and counselling to empower self-care as well as psychosocial support.
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13
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Wojtkowska I, Bonda TA, Wolszakiewicz J, Osak J, Tysarowski A, Seliga K, Siedlecki JA, Winnicka MM, Piotrowicz R, Stępińska J. Myocardial Expression of PPAR γ and Exercise Capacity in Patients after Coronary Artery Bypass Surgery. PPAR Res 2017; 2017:1924907. [PMID: 29093735 PMCID: PMC5637858 DOI: 10.1155/2017/1924907] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/30/2017] [Revised: 07/21/2017] [Accepted: 08/21/2017] [Indexed: 11/18/2022] Open
Abstract
Activation of PPARs may be involved in the development of heart failure (HF). We evaluated the relationship between expression of PPARγ in the myocardium during coronary artery bypass grafting (CABG) and exercise tolerance initially and during follow-up. 6-minute walking test was performed before CABG, after 1, 12, 24 months. Patients were divided into two groups (HF and non-HF) based on left ventricular ejection fraction and plasma proBNP level. After CABG, 67% of patients developed HF. The mean distance 1 month after CABG in HF was 397 ± 85 m versus 420 ± 93 m in non-HF. PPARγ mRNA expression was similar in both HF and non-HF groups. 6MWT distance 1 month after CABG was inversely correlated with PPARγ level only in HF group. Higher PPARγ expression was related to smaller LVEF change between 1 month and 1 year (R = 0.18, p < 0.05), especially in patients with HF. Higher initial levels of IL-6 in HF patients were correlated with longer distance in 6MWT one month after surgery and lower PPARγ expression. PPARγ expression is not related to LVEF before CABG and higher PPARγ expression in the myocardium of patients who are developing HF following CABG may have some protecting effect.
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Affiliation(s)
- Izabela Wojtkowska
- Institute of Cardiology, Intensive Cardiac Therapy Clinic, Alpejska St. 42, 04-628 Warsaw, Poland
| | - Tomasz A. Bonda
- Department of General and Experimental Pathology, Medical University of Bialystok, Mickiewicza St. 2c, 15-222 Bialystok, Poland
| | - Jadwiga Wolszakiewicz
- Institute of Cardiology, Department of Cardiac Rehabilitation and Noninvasive Electrocardiology, Alpejska St. 42, 04-628 Warsaw, Poland
| | - Jerzy Osak
- Institute of Cardiology, Department of Cardiac Rehabilitation and Noninvasive Electrocardiology, Alpejska St. 42, 04-628 Warsaw, Poland
| | - Andrzej Tysarowski
- Institute of Oncology, Department of Molecular and Translational Oncology, Wawelska St. 15B, 02-034 Warsaw, Poland
| | - Katarzyna Seliga
- Institute of Oncology, Department of Molecular and Translational Oncology, Wawelska St. 15B, 02-034 Warsaw, Poland
| | - Janusz A. Siedlecki
- Institute of Oncology, Department of Molecular and Translational Oncology, Wawelska St. 15B, 02-034 Warsaw, Poland
| | - Maria M. Winnicka
- Department of General and Experimental Pathology, Medical University of Bialystok, Mickiewicza St. 2c, 15-222 Bialystok, Poland
| | - Ryszard Piotrowicz
- Institute of Cardiology, Department of Cardiac Rehabilitation and Noninvasive Electrocardiology, Alpejska St. 42, 04-628 Warsaw, Poland
| | - Janina Stępińska
- Institute of Cardiology, Intensive Cardiac Therapy Clinic, Alpejska St. 42, 04-628 Warsaw, Poland
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14
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Carbone S, Popovic D, Lavie CJ, Arena R. Obesity, body composition and cardiorespiratory fitness in heart failure with preserved ejection fraction. Future Cardiol 2017; 13:451-463. [DOI: 10.2217/fca-2017-0023] [Citation(s) in RCA: 31] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023] Open
Abstract
Obesity is defined as an excess body fat that impairs health and is associated with increased risk of heart failure (HF), particularly HF with preserved ejection fraction (HFpEF), evolving into a ‘HFpEF obesity phenotype’. The interplay between obesity and cardiorespiratory fitness, primary clinical parameters in HF, requires further exploration. The contribution of body composition compartments in the development and progress of HF has been the object of numerous studies. Here we focus on how fat mass and lean tissues affect cardiorespiratory fitness, with emphasis on their effects on peak oxygen consumption. Moreover, while several studies have focused on characterization of body composition compartments, here we describe also recent findings related to abnormal and/or dysfunctional lean mass, especially in HFpEF.
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Affiliation(s)
- Salvatore Carbone
- VCU Pauley Heart Center – Virginia Commonwealth University West Hospital – 5th Floor, Room 520 1200 E Broad Street, PO Box 980204, Richmond, VA 23298, USA
- Victoria Johnson Research Laboratories, Virginia Commonwealth University, Richmond, VA 23298, USA
- Department of Experimental Medicine, Sapienza University of Rome, Rome, Italy
| | - Dejana Popovic
- Department of Cardiology, University Clinical Center Serbia, Faculty of Pharmacy University of Belgrade, Belgrade, Serbia
| | - Carl J Lavie
- John Ochsner Heart & Vascular Institute, Ochsner Clinical School-the University of Queensland School of Medicine, New Orleans, LA, USA
| | - Ross Arena
- Department of Physical Therapy, College of Applied Health Sciences, University of Illinois at Chicago, Chicago, IL 60607, USA
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15
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Targeting Endothelial Function to Treat Heart Failure with Preserved Ejection Fraction: The Promise of Exercise Training. OXIDATIVE MEDICINE AND CELLULAR LONGEVITY 2017; 2017:4865756. [PMID: 28706575 PMCID: PMC5494585 DOI: 10.1155/2017/4865756] [Citation(s) in RCA: 41] [Impact Index Per Article: 5.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 02/10/2017] [Revised: 04/20/2017] [Accepted: 04/24/2017] [Indexed: 12/22/2022]
Abstract
Although the burden of heart failure with preserved ejection fraction (HFpEF) is increasing, there is no therapy available that improves prognosis. Clinical trials using beta blockers and angiotensin converting enzyme inhibitors, cardiac-targeting drugs that reduce mortality in heart failure with reduced ejection fraction (HFrEF), have had disappointing results in HFpEF patients. A new “whole-systems” approach has been proposed for designing future HFpEF therapies, moving focus from the cardiomyocyte to the endothelium. Indeed, dysfunction of endothelial cells throughout the entire cardiovascular system is suggested as a central mechanism in HFpEF pathophysiology. The objective of this review is to provide an overview of current knowledge regarding endothelial dysfunction in HFpEF. We discuss the molecular and cellular mechanisms leading to endothelial dysfunction and the extent, presence, and prognostic importance of clinical endothelial dysfunction in different vascular beds. We also consider implications towards exercise training, a promising therapy targeting system-wide endothelial dysfunction in HFpEF.
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16
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Sung MM, Byrne NJ, Robertson IM, Kim TT, Samokhvalov V, Levasseur J, Soltys CL, Fung D, Tyreman N, Denou E, Jones KE, Seubert JM, Schertzer JD, Dyck JRB. Resveratrol improves exercise performance and skeletal muscle oxidative capacity in heart failure. Am J Physiol Heart Circ Physiol 2017; 312:H842-H853. [PMID: 28159807 DOI: 10.1152/ajpheart.00455.2016] [Citation(s) in RCA: 55] [Impact Index Per Article: 7.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/27/2016] [Revised: 01/18/2017] [Accepted: 01/30/2017] [Indexed: 12/19/2022]
Abstract
We investigated whether treatment of mice with established pressure overload-induced heart failure (HF) with the naturally occurring polyphenol resveratrol could improve functional symptoms of clinical HF such as fatigue and exercise intolerance. C57Bl/6N mice were subjected to either sham or transverse aortic constriction surgery to induce HF. Three weeks postsurgery, a cohort of mice with established HF (%ejection fraction <45) was administered resveratrol (~450 mg·kg-1·day-1) or vehicle for 2 wk. Although the percent ejection fraction was similar between both groups of HF mice, those mice treated with resveratrol had increased total physical activity levels and exercise capacity. Resveratrol treatment was associated with altered gut microbiota composition, increased skeletal muscle insulin sensitivity, a switch toward greater whole body glucose utilization, and increased basal metabolic rates. Although muscle mass and strength were not different between groups, mice with HF had significant declines in basal and ADP-stimulated O2 consumption in isolated skeletal muscle fibers compared with sham mice, which was completely normalized by resveratrol treatment. Overall, resveratrol treatment of mice with established HF enhances exercise performance, which is associated with alterations in whole body and skeletal muscle energy metabolism. Thus, our preclinical data suggest that resveratrol supplementation may effectively improve fatigue and exercise intolerance in HF patients.NEW & NOTEWORTHY Resveratrol treatment of mice with heart failure leads to enhanced exercise performance that is associated with altered gut microbiota composition, increased whole body glucose utilization, and enhanced skeletal muscle metabolism and function. Together, these preclinical data suggest that resveratrol supplementation may effectively improve fatigue and exercise intolerance in heart failure via these mechanisms.
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Affiliation(s)
- Miranda M Sung
- Faculty of Medicine and Dentistry, Department of Pediatrics, Cardiovascular Research Centre, Mazankowski Alberta Heart Institute, University of Alberta, Edmonton, Alberta, Canada
| | - Nikole J Byrne
- Faculty of Medicine and Dentistry, Department of Pediatrics, Cardiovascular Research Centre, Mazankowski Alberta Heart Institute, University of Alberta, Edmonton, Alberta, Canada
| | - Ian M Robertson
- Faculty of Medicine and Dentistry, Department of Pediatrics, Cardiovascular Research Centre, Mazankowski Alberta Heart Institute, University of Alberta, Edmonton, Alberta, Canada
| | - Ty T Kim
- Faculty of Medicine and Dentistry, Department of Pediatrics, Cardiovascular Research Centre, Mazankowski Alberta Heart Institute, University of Alberta, Edmonton, Alberta, Canada
| | - Victor Samokhvalov
- Faculty of Pharmacy & Pharmaceutical Sciences, Cardiovascular Research Centre, University of Alberta, Edmonton, Alberta, Canada
| | - Jody Levasseur
- Alberta Heart Failure Etiology and Analysis Research Team, Alberta Heritage Foundation for Medical Research Interdisciplinary Team Grant, Edmonton, Alberta, Canada
| | - Carrie-Lynn Soltys
- Faculty of Medicine and Dentistry, Department of Pediatrics, Cardiovascular Research Centre, Mazankowski Alberta Heart Institute, University of Alberta, Edmonton, Alberta, Canada
| | - David Fung
- Faculty of Medicine and Dentistry, Department of Pediatrics, Cardiovascular Research Centre, Mazankowski Alberta Heart Institute, University of Alberta, Edmonton, Alberta, Canada
| | - Neil Tyreman
- Department of Physical Education, University of Alberta, Edmonton, Alberta, Canada; and
| | - Emmanuel Denou
- Department of Biochemistry and Biomedical Sciences and Farncombe Family Digestive Health Research Institute, McMaster University, Hamilton, Ontario, Canada
| | - Kelvin E Jones
- Department of Physical Education, University of Alberta, Edmonton, Alberta, Canada; and
| | - John M Seubert
- Faculty of Pharmacy & Pharmaceutical Sciences, Cardiovascular Research Centre, University of Alberta, Edmonton, Alberta, Canada
| | - Jonathan D Schertzer
- Department of Biochemistry and Biomedical Sciences and Farncombe Family Digestive Health Research Institute, McMaster University, Hamilton, Ontario, Canada
| | - Jason R B Dyck
- Faculty of Medicine and Dentistry, Department of Pediatrics, Cardiovascular Research Centre, Mazankowski Alberta Heart Institute, University of Alberta, Edmonton, Alberta, Canada; .,Alberta Heart Failure Etiology and Analysis Research Team, Alberta Heritage Foundation for Medical Research Interdisciplinary Team Grant, Edmonton, Alberta, Canada
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17
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Abstract
PURPOSE OF REVIEW The majority of patients currently implanted with left ventricular assist devices have the expectation of support for more than 2 years. As a result, survival alone is no longer a sufficient distinctive for this technology, and there have been many studies within the last few years examining functional capacity and exercise outcomes. RECENT FINDINGS Despite strong evidence for functional class improvements and increases in simple measures of walking distance, there remains incomplete normalization of exercise capacity, even in the presence of markedly improved resting hemodynamics. Reasons for this remain unclear. Despite current pumps being run at a fixed speed, it is widely recognized that pump outputs significantly increase with exercise. The mechanism of this increase involves the interaction between preload, afterload, and the intrinsic pump function curves. The role of the residual heart function is also important in determining total cardiac output, as well as whether the aortic valve opens with exercise. Interactions with the vasculature, with skeletal muscle blood flow and the state of the autonomic nervous system are also likely to be important contributors to exercise performance. SUMMARY Further studies examining optimization of pump function with active pump speed modulation and options for optimization of the overall patient condition are likely to be needed to allow left ventricular assist devices to be used with the hope of full functional physiological recovery.
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18
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Pearson MJ, Smart NA. Effect of exercise training on endothelial function in heart failure patients: A systematic review meta-analysis. Int J Cardiol 2016; 231:234-243. [PMID: 28089145 DOI: 10.1016/j.ijcard.2016.12.145] [Citation(s) in RCA: 55] [Impact Index Per Article: 6.9] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/20/2016] [Revised: 11/23/2016] [Accepted: 12/20/2016] [Indexed: 12/20/2022]
Abstract
OBJECTIVE Endothelial dysfunction contributes to the development and progression of cardiovascular disease and heart failure (HF) and is associated with an increased risk of mortality. Flow-mediated dilation (FMD) is widely utilised to assess endothelial function and is improved with exercise training in heart failure patients. The aim of this meta-analysis is to quantify the effect of exercise training in patients with heart failure. BACKGROUND A large number of studies now exist that have examined endothelial function in patients with heart failure. We sought to add to the current literature by quantifying the effect of exercise training on endothelial function. METHODS We conducted database searches (PubMed, EMBASE, PROQUEST and Cochrane Trials Register to June 2016) for exercise based rehabilitation trials in heart failure, using search terms exercise training, endothelial function, flow-mediated dilation (FMD) and endothelial progenitor cells (EPCs). RESULTS The 16 included studies provided a total of 529 participants, 293 in an intervention and 236 in controls groups. FMD was improved with exercise training in exercise vs. control, SMD of 1.08 (95%CI 0.70 to 1.46, p<0.00001). CONCLUSION Overall exercise training improved endothelial function, assessed via FMD, and endothelial progenitor cells in heart failure patients.
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Affiliation(s)
- M J Pearson
- School of Science and Technology, University of New England, Armidale, NSW 2351, Australia
| | - N A Smart
- School of Science and Technology, University of New England, Armidale, NSW 2351, Australia.
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19
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Maximal oxygen uptake and exercise tolerance are improved in rats with heart failure subjected to low-level laser therapy associated with resistance training. Lasers Med Sci 2016; 32:73-85. [PMID: 27858257 DOI: 10.1007/s10103-016-2088-3] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/21/2016] [Accepted: 09/27/2016] [Indexed: 12/19/2022]
Abstract
Exercise tolerance and maximal oxygen uptake (VO2max) are reduced in heart failure (HF). The influence of combined resistance training (RT) and low-level laser therapy (LLLT) on exercise tolerance and VO2max in HF has not yet been explored. The aim of this study was to evaluate the influence of combined RT and LLLT on VO2max and exercise tolerance in rats with HF induced by myocardial infarction (MI). Rats were allocated to sedentary sham (Sed-Sham, n = 12), sedentary heart failure (Sed-HF, n = 9), RT heart failure (RT-HF, n = 7) and RT associated with LLLT heart failure (RT + LLLT-HF, n = 7) groups. After MI or sham surgery, rats underwent a RT and LLLT protocol (applied immediately after RT) for 8 weeks. VO2max and exercise tolerance were evaluated at the end of protocol. HF rats subjected to LLLT combined with RT showed higher VO2basal (41 %), VO2max (40 %), VO2reserve (39 %), run distance (46 %), time to exhaustion (30 %) and maximal velocity (22 %) compared with HF rats that underwent RT alone. LLLT associated with RT improved oxygen uptake and exercise tolerance compared with RT alone in HF rats.
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20
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Recchioni R, Marcheselli F, Antonicelli R, Lazzarini R, Mensà E, Testa R, Procopio AD, Olivieri F. Physical activity and progenitor cell-mediated endothelial repair in chronic heart failure: Is there a role for epigenetics? Mech Ageing Dev 2016; 159:71-80. [DOI: 10.1016/j.mad.2016.03.008] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/30/2015] [Revised: 03/17/2016] [Accepted: 03/21/2016] [Indexed: 02/09/2023]
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21
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Van Craenenbroeck AH, Van Craenenbroeck EM, Van Ackeren K, Hoymans VY, Verpooten GA, Vrints CJ, Couttenye MM. Impaired vascular function contributes to exercise intolerance in chronic kidney disease. Nephrol Dial Transplant 2016; 31:2064-2072. [PMID: 27540045 DOI: 10.1093/ndt/gfw303] [Citation(s) in RCA: 41] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/12/2016] [Accepted: 07/03/2016] [Indexed: 01/09/2023] Open
Abstract
BACKGROUND Exercise intolerance is an important feature in patients with chronic kidney disease (CKD) and is prognostic for both increased morbidity and mortality. Little is known about the underlying mechanisms in predialysis CKD. This study aimed to gain more insight into the role of vascular dysfunction in the exercise intolerance of predialysis CKD. In addition, vascular-related microRNAs (miRNAs)-as epigenetic regulators of exercise capacity-were analysed. METHODS Sixty-three patients with CKD stages 1-5 and 18 healthy controls were included. Peak oxygen consumption (VO2peak) was determined by cardiopulmonary exercise testing, endothelial function by flow-mediated dilation (FMD) and arterial stiffness by carotid-femoral pulse wave velocity (PWV). Plasma miRNA levels (miR-21, miR-126, miR-146a, miR-150 and miR-210) were quantified by quantitative RT-PCR. RESULTS VO2peak was already impaired in mild CKD (stages 1-3A) and significantly correlated with estimated glomerular filtration rate (eGFR; r = 0.525, P < 0.001). Likewise, both FMD and PWV were significantly correlated with eGFR (r = 0.319, P = 0.007 and r = -0.365, P = 0.001, respectively). In multiple regression analysis, PWV remained one of the strongest independent determinants of VO2peak (β = -0.301, P = 0.01). Of the studied miRNA, circulating levels of miR-146a and miR-150 correlated with eGFR, PWV and VO2peak, but the association with the latter was lost when correcting for PWV. CONCLUSIONS Arterial stiffness contributes to the observed reduced aerobic capacity in predialysis CKD, independent of age, haemoglobin levels and endothelial function and represents a promising therapeutic target for improving exercise capacity in this population. Future work is required to elucidate why higher circulating levels of miR-146a and miR-150 are associated with impaired renal function and increased arterial stiffness.
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Affiliation(s)
- Amaryllis H Van Craenenbroeck
- Department of Nephrology, Antwerp University Hospital, Wilrijkstraat 10, 2650 Edegem, Belgium.,Laboratory for Molecular and Cellular Cardiology, University of Antwerp, Edegem, Belgium.,Laboratory of Experimental Medicine and Pediatrics, University of Antwerp, Edegem, Belgium
| | - Emeline M Van Craenenbroeck
- Laboratory for Molecular and Cellular Cardiology, University of Antwerp, Edegem, Belgium.,Department of Cardiology, Antwerp University Hospital, Edegem, Belgium
| | - Katrijn Van Ackeren
- Laboratory for Molecular and Cellular Cardiology, University of Antwerp, Edegem, Belgium
| | - Vicky Y Hoymans
- Laboratory for Molecular and Cellular Cardiology, University of Antwerp, Edegem, Belgium
| | - Gert A Verpooten
- Laboratory of Experimental Medicine and Pediatrics, University of Antwerp, Edegem, Belgium
| | - Christiaan J Vrints
- Laboratory for Molecular and Cellular Cardiology, University of Antwerp, Edegem, Belgium.,Department of Cardiology, Antwerp University Hospital, Edegem, Belgium
| | - Marie M Couttenye
- Department of Nephrology, Antwerp University Hospital, Wilrijkstraat 10, 2650 Edegem, Belgium
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22
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Cornelis J, Beckers P, Taeymans J, Vrints C, Vissers D. Comparing exercise training modalities in heart failure: A systematic review and meta-analysis. Int J Cardiol 2016; 221:867-76. [PMID: 27434363 DOI: 10.1016/j.ijcard.2016.07.105] [Citation(s) in RCA: 56] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/07/2016] [Revised: 07/01/2016] [Accepted: 07/07/2016] [Indexed: 01/15/2023]
Abstract
Exercise training (ET) is suggested to improve exercise capacity, prognosis, quality of life (QOL) and functional modifications of the heart in patients with heart failure (HF). However, it is not clear which modality is best. In order to assess the effectiveness of different ET modalities on prognostic cardiopulmonary exercise test (CPET) parameters, QOL and left ventricular remodeling, a systematic review and meta-analysis was performed. Randomized clinical trials (RCTs) were selected in three databases. The primary outcome data were peak oxygen uptake, ventilation over carbon dioxide slope, oxygen uptake efficiency slope, exercise oscillatory ventilation, rest and peak pulmonary end-tidal CO2. Secondary variables were QOL, left ventricular ejection fraction (LVEF) and left ventricular end-diastolic diameter (LVEDD). Twenty RCTs (n=811) met the a priori stated inclusion criteria. Studies were categorized into four different groups: "interval training (IT1) versus combined interval and strength training (IT1S)" (n=156), "continuous training (CT1) versus combined continuous and strength training (CT1S)" (n=130), "interval training (IT2) versus continuous training (CT2)" (n=501) and "continuous training (CT3) versus strength training (S3)" (n=24). No significant random effects of exercise modality were revealed assessing the CPET parameters. There was a significant improvement in QOL applying CT1S (P<0.001). Comparing IT2 with CT2, LVEDD and LVEF were significantly improved favoring IT2 (P<0.001). There is some evidence to support that interval training is more effective to improve LVEF and LVEDD. The fact that patients with HF are actively involved in any kind of ET program seems sufficient to improve the prognosis, QOL and anatomic function.
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Affiliation(s)
- Justien Cornelis
- University of Antwerp, Faculty of Medicine and Health Sciences, Department of Rehabilitation Sciences and Physiotherapy, Universiteitsplein 1, CDE S0.22, B-2610 Wilrijk, Belgium.
| | - Paul Beckers
- University of Antwerp, Faculty of Medicine and Health Sciences, Department of Rehabilitation Sciences and Physiotherapy, Universiteitsplein 1, CDE S0.22, B-2610 Wilrijk, Belgium; Antwerp University Hospital, Department of Cardiology, Wilrijkstraat 10, B-2650 Edegem, Belgium; University of Antwerp, Faculty of Medicine and Health Sciences, Department of Medicine, Universiteitsplein 1, B-2610 Wilrijk, Belgium
| | - Jan Taeymans
- University of Antwerp, Faculty of Medicine and Health Sciences, Department of Rehabilitation Sciences and Physiotherapy, Universiteitsplein 1, CDE S0.22, B-2610 Wilrijk, Belgium; Vrije Universiteit Brussel, Faculty of Physical Education and Physical Therapy, Pleinlaan 2, B-1050 Elsene, Belgium; Bern University of Applied Sciences (Health), Murtenstrasse 10, CH-3008 Bern, Switzerland
| | - Christiaan Vrints
- Antwerp University Hospital, Department of Cardiology, Wilrijkstraat 10, B-2650 Edegem, Belgium; University of Antwerp, Faculty of Medicine and Health Sciences, Department of Medicine, Universiteitsplein 1, B-2610 Wilrijk, Belgium
| | - Dirk Vissers
- University of Antwerp, Faculty of Medicine and Health Sciences, Department of Rehabilitation Sciences and Physiotherapy, Universiteitsplein 1, CDE S0.22, B-2610 Wilrijk, Belgium
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23
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Babu AS, Arena R, Myers J, Padmakumar R, Maiya AG, Cahalin LP, Waxman AB, Lavie CJ. Exercise intolerance in pulmonary hypertension: mechanism, evaluation and clinical implications. Expert Rev Respir Med 2016; 10:979-90. [PMID: 27192047 DOI: 10.1080/17476348.2016.1191353] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/16/2023]
Abstract
INTRODUCTION Exercise intolerance in pulmonary hypertension (PH) is a major factor affecting activities of daily living and quality of life. Evaluation strategies (i.e., non-invasive and invasive tests) are integral to providing a comprehensive assessment of clinical and functional status. Despite a growing body of literature on the clinical consequences of PH, there are limited studies discussing the contribution of various physiological systems to exercise intolerance in this patient population. AREAS COVERED This review, through a search of various databases, describes the physiological basis for exercise intolerance across the various PH etiologies, highlights the various exercise evaluation methods and discusses the rationale for exercise training amongst those diagnosed with PH. Expert commentary: With the growing importance of evaluating exercise capacity in PH (class 1, Level C recommendation), understanding why exercise performance is altered in PH is crucial. Thus, the further study is required for better quality evidence in this area.
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Affiliation(s)
- Abraham Samuel Babu
- a Department of Physiotherapy, School of Allied Health Sciences , Manipal University , Manipal , Karnataka , India
| | - Ross Arena
- b Department of Physical Therapy and Department of Kinesiology and Nutrition , University of Illinois at Chicago , Chicago , USA
| | - Jonathan Myers
- c Veterans Affairs Health Center , Stanford University , Palo Alto , CA , USA
| | | | - Arun G Maiya
- a Department of Physiotherapy, School of Allied Health Sciences , Manipal University , Manipal , Karnataka , India
| | - Lawrence P Cahalin
- e Department of Physical Therapy , Millers School of Medicine , Miami , FL , USA
| | - Aaron B Waxman
- f Pulmonary Vascular Disease Program, Dyspnea and Performance Evaluation Center, Pulmonary Critical Care Medicine, Cardiovascular Medicine , Brigham and Women's Hospital, Harvard Medical School , Boston , MA , USA
| | - Carl J Lavie
- g Department of Cardiovascular Diseases, John Ochsner Heart and Vascular Institute, Ochsner Clinical School , The University of Queensland School of Medicine , New Orleans , LA , USA
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24
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Li T, Cheng HJ, Ohte N, Hasegawa H, Morimoto A, Herrington DM, Little WC, Li W, Cheng CP. C-Type Natriuretic Peptide Improves Left Ventricular Functional Performance at Rest and Restores Normal Exercise Responses after Heart Failure. J Pharmacol Exp Ther 2016; 357:545-53. [PMID: 27026682 PMCID: PMC4885509 DOI: 10.1124/jpet.115.231696] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/22/2015] [Accepted: 03/28/2016] [Indexed: 01/20/2023] Open
Abstract
In heart failure (HF), the impaired left ventricular (LV) arterial coupling and diastolic dysfunction present at rest are exacerbated during exercise. C-type natriuretic peptide (CNP) is elevated in HF; however, its functional effects are unclear. We tested the hypotheses that CNP with vasodilating, natriuretic, and positive inotropic and lusitropic actions may prevent this abnormal exercise response after HF. We determined the effects of CNP (2 μg/kg plus 0.4 μg/kg per minute, i.v., 20 minutes) on plasma levels of cGMP before and after HF and assessed LV dynamics during exercise in 10 chronically instrumented dogs with pacing-induced HF. Compared with the levels before HF, CNP infusion caused significantly greater increases in cGMP levels after HF. After HF, at rest, CNP administration significantly reduced LV end-systolic pressure (PES), arterial elastance (EA), and end-diastolic pressure. The peak mitral flow (dV/dtmax) was also increased owing to decreased minimum LVP (LVPmin) and the time constant of LV relaxation (τ) (P < 0.05). In addition, LV contractility (EES) was increased. The LV-arterial coupling (EES/EA) was improved. The beneficial effects persisted during exercise. Compared with exercise in HF preparation, treatment with CNP caused significantly less important increases in PES but significantly decreased τ (34.2 vs. 42.6 ms) and minimum left ventricular pressure with further augmented dV/dtmax Both EES, EES/EA (0.87 vs. 0.32) were increased. LV mechanical efficiency improved from 0.38 to 0.57 (P < 0.05). After HF, exogenous CNP produces arterial vasodilatation and augments LV contraction, relaxation, diastolic filling, and LV arterial coupling, thus improving LV performance at rest and restoring normal exercise responses after HF.
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Affiliation(s)
- Tiankai Li
- Wake Forest School of Medicine, Winston-Salem, North Carolina (H.J.C., N.O., H.H., A.M., D.M.H., W.C.L., C.P.C.), and the First Affiliated Hospital of Harbin Medical University, Harbin, China (T.L., H.J.C, W.L., C.P.C)
| | - Heng-Jie Cheng
- Wake Forest School of Medicine, Winston-Salem, North Carolina (H.J.C., N.O., H.H., A.M., D.M.H., W.C.L., C.P.C.), and the First Affiliated Hospital of Harbin Medical University, Harbin, China (T.L., H.J.C, W.L., C.P.C)
| | - Nobuyuki Ohte
- Wake Forest School of Medicine, Winston-Salem, North Carolina (H.J.C., N.O., H.H., A.M., D.M.H., W.C.L., C.P.C.), and the First Affiliated Hospital of Harbin Medical University, Harbin, China (T.L., H.J.C, W.L., C.P.C)
| | - Hiroshi Hasegawa
- Wake Forest School of Medicine, Winston-Salem, North Carolina (H.J.C., N.O., H.H., A.M., D.M.H., W.C.L., C.P.C.), and the First Affiliated Hospital of Harbin Medical University, Harbin, China (T.L., H.J.C, W.L., C.P.C)
| | - Atsushi Morimoto
- Wake Forest School of Medicine, Winston-Salem, North Carolina (H.J.C., N.O., H.H., A.M., D.M.H., W.C.L., C.P.C.), and the First Affiliated Hospital of Harbin Medical University, Harbin, China (T.L., H.J.C, W.L., C.P.C)
| | - David M Herrington
- Wake Forest School of Medicine, Winston-Salem, North Carolina (H.J.C., N.O., H.H., A.M., D.M.H., W.C.L., C.P.C.), and the First Affiliated Hospital of Harbin Medical University, Harbin, China (T.L., H.J.C, W.L., C.P.C)
| | - William C Little
- Wake Forest School of Medicine, Winston-Salem, North Carolina (H.J.C., N.O., H.H., A.M., D.M.H., W.C.L., C.P.C.), and the First Affiliated Hospital of Harbin Medical University, Harbin, China (T.L., H.J.C, W.L., C.P.C)
| | - Weimin Li
- Wake Forest School of Medicine, Winston-Salem, North Carolina (H.J.C., N.O., H.H., A.M., D.M.H., W.C.L., C.P.C.), and the First Affiliated Hospital of Harbin Medical University, Harbin, China (T.L., H.J.C, W.L., C.P.C)
| | - Che Ping Cheng
- Wake Forest School of Medicine, Winston-Salem, North Carolina (H.J.C., N.O., H.H., A.M., D.M.H., W.C.L., C.P.C.), and the First Affiliated Hospital of Harbin Medical University, Harbin, China (T.L., H.J.C, W.L., C.P.C)
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Byrne NJ, Levasseur J, Sung MM, Masson G, Boisvenue J, Young ME, Dyck JRB. Normalization of cardiac substrate utilization and left ventricular hypertrophy precede functional recovery in heart failure regression. Cardiovasc Res 2016; 110:249-57. [PMID: 26968698 DOI: 10.1093/cvr/cvw051] [Citation(s) in RCA: 26] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/30/2015] [Accepted: 03/02/2016] [Indexed: 12/20/2022] Open
Abstract
AIMS Impaired cardiac substrate metabolism plays an important role in heart failure (HF) pathogenesis. Since many of these metabolic changes occur at the transcriptional level of metabolic enzymes, it is possible that this loss of metabolic flexibility is permanent and thus contributes to worsening cardiac function and/or prevents the full regression of HF upon treatment. However, despite the importance of cardiac energetics in HF, it remains unclear whether these metabolic changes can be normalized. In the current study, we investigated whether a reversal of an elevated aortic afterload in mice with severe HF would result in the recovery of cardiac function, substrate metabolism, and transcriptional reprogramming as well as determined the temporal relationship of these changes. METHODS AND RESULTS Male C57Bl/6 mice were subjected to either Sham or transverse aortic constriction (TAC) surgery to induce HF. After HF development, mice with severe HF (% ejection fraction < 30) underwent a second surgery to remove the aortic constriction (debanding, DB). Three weeks following DB, there was a near complete recovery of systolic and diastolic function, and gene expression of several markers for hypertrophy/HF were returned to values observed in healthy controls. Interestingly, pressure-overload-induced left ventricular hypertrophy (LVH) and cardiac substrate metabolism were restored at 1-week post-DB, which preceded functional recovery. CONCLUSIONS The regression of severe HF is associated with early and dramatic improvements in cardiac energy metabolism and LVH normalization that precede restored cardiac function, suggesting that metabolic and structural improvements may be critical determinants for functional recovery.
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Affiliation(s)
- Nikole J Byrne
- Cardiovascular Research Centre, Department of Pediatrics, Faculty of Medicine and Dentistry, University of Alberta, Edmonton, AB, Canada
| | - Jody Levasseur
- Cardiovascular Research Centre, Department of Pediatrics, Faculty of Medicine and Dentistry, University of Alberta, Edmonton, AB, Canada
| | - Miranda M Sung
- Cardiovascular Research Centre, Department of Pediatrics, Faculty of Medicine and Dentistry, University of Alberta, Edmonton, AB, Canada
| | - Grant Masson
- Cardiovascular Research Centre, Department of Pediatrics, Faculty of Medicine and Dentistry, University of Alberta, Edmonton, AB, Canada
| | - Jamie Boisvenue
- Cardiovascular Research Centre, Department of Pediatrics, Faculty of Medicine and Dentistry, University of Alberta, Edmonton, AB, Canada
| | - Martin E Young
- Department of Medicine, University of Alabama at Birmingham, Birmingham, AL, USA
| | - Jason R B Dyck
- Cardiovascular Research Centre, Department of Pediatrics, Faculty of Medicine and Dentistry, University of Alberta, Edmonton, AB, Canada
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Glean AA, Ferguson SK, Holdsworth CT, Colburn TD, Wright JL, Fees AJ, Hageman KS, Poole DC, Musch TI. Effects of nitrite infusion on skeletal muscle vascular control during exercise in rats with chronic heart failure. Am J Physiol Heart Circ Physiol 2015; 309:H1354-60. [PMID: 26371165 DOI: 10.1152/ajpheart.00421.2015] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/03/2015] [Accepted: 09/02/2015] [Indexed: 11/22/2022]
Abstract
Chronic heart failure (CHF) reduces nitric oxide (NO) bioavailability and impairs skeletal muscle vascular control during exercise. Reduction of NO2 (-) to NO may impact exercise-induced hyperemia, particularly in muscles with pathologically reduced O2 delivery. We tested the hypothesis that NO2 (-) infusion would increase exercising skeletal muscle blood flow (BF) and vascular conductance (VC) in CHF rats with a preferential effect in muscles composed primarily of type IIb + IId/x fibers. CHF (coronary artery ligation) was induced in adult male Sprague-Dawley rats. After a >21-day recovery, mean arterial pressure (MAP; carotid artery catheter) and skeletal muscle BF (radiolabeled microspheres) were measured during treadmill exercise (20 m/min, 5% incline) with and without NO2 (-) infusion. The myocardial infarct size (35 ± 3%) indicated moderate CHF. NO2 (-) infusion increased total hindlimb skeletal muscle VC (CHF: 0.85 ± 0.09 ml·min(-1)·100 g(-1)·mmHg(-1) and CHF + NO2 (-): 0.93 ± 0.09 ml·min(-1)·100 g(-1)·mmHg(-1), P < 0.05) without changing MAP (CHF: 123 ± 4 mmHg and CHF + NO2 (-): 120 ± 4 mmHg, P = 0.17). Total hindlimb skeletal muscle BF was not significantly different (CHF: 102 ± 7 and CHF + NO2 (-): 109 ± 7 ml·min(-1)·100 g(-1) ml·min(-1)·100 g(-1), P > 0.05). BF increased in 6 (∼21%) and VC in 8 (∼29%) of the 28 individual muscles and muscle parts. Muscles and muscle portions exhibiting greater BF and VC after NO2 (-) infusion comprised ≥63% type IIb + IId/x muscle fibers. These data demonstrate that NO2 (-) infusion can augment skeletal muscle vascular control during exercise in CHF rats. Given the targeted effects shown herein, a NO2 (-)-based therapy may provide an attractive "needs-based" approach for treatment of the vascular dysfunction in CHF.
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Affiliation(s)
- Angela A Glean
- Department of Kinesiology, Kansas State University, Manhattan, Kansas
| | - Scott K Ferguson
- Department of Anatomy and Physiology, Kansas State University, Manhattan, Kansas; and
| | - Clark T Holdsworth
- Department of Anatomy and Physiology, Kansas State University, Manhattan, Kansas; and
| | - Trenton D Colburn
- Department of Kinesiology, Kansas State University, Manhattan, Kansas
| | - Jennifer L Wright
- Department of Anatomy and Physiology, Kansas State University, Manhattan, Kansas; and
| | - Alex J Fees
- Department of Anatomy and Physiology, Kansas State University, Manhattan, Kansas; and
| | - Karen S Hageman
- Department of Anatomy and Physiology, Kansas State University, Manhattan, Kansas; and
| | - David C Poole
- Department of Anatomy and Physiology, Kansas State University, Manhattan, Kansas; and Department of Kinesiology, Kansas State University, Manhattan, Kansas
| | - Timothy I Musch
- Department of Anatomy and Physiology, Kansas State University, Manhattan, Kansas; and Department of Kinesiology, Kansas State University, Manhattan, Kansas
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Abstract
Despite existing therapies, patients with heart failure have a very poor quality of life and a high 1-year mortality rate. Given the impact of this syndrome on health outcomes, research is being directed toward identifying novel strategies to treat heart failure symptoms as well as to prolong survival. One molecule that has been tested in animal models for this purpose is resveratrol. Resveratrol is a naturally occurring polyphenol found in several plants, and administration of resveratrol has been shown to prevent and/or slow the progression of heart failure in animal models of heart failure induced by myocardial infarction, pressure overload, myocarditis, and chemotherapy-induced cardiotoxicity. In addition, some animal studies have shown that resveratrol improves cardiac function and survival when administered as a treatment for established heart failure. Furthermore, as heart failure induces alterations in skeletal muscle and vasculature that also contribute to certain heart failure symptoms, such as fatigue and exercise intolerance, it has also been shown that resveratrol acts on these peripheral tissues to improve skeletal muscle and endothelial/vascular function. Therefore, if these animal studies translate to humans, resveratrol may prove to be a novel therapy for the treatment of heart failure.
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Affiliation(s)
- Miranda M Sung
- Department of Pediatrics, Cardiovascular Research Centre, University of Alberta, Edmonton, Alberta, Canada
| | - Jason R B Dyck
- Department of Pediatrics, Cardiovascular Research Centre, University of Alberta, Edmonton, Alberta, Canada
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Holloway TM, Bloemberg D, da Silva ML, Quadrilatero J, Spriet LL. High-intensity interval and endurance training are associated with divergent skeletal muscle adaptations in a rodent model of hypertension. Am J Physiol Regul Integr Comp Physiol 2015; 308:R927-34. [DOI: 10.1152/ajpregu.00048.2015] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/11/2015] [Accepted: 04/08/2015] [Indexed: 12/11/2022]
Abstract
Skeletal muscle is extremely adaptable to a variety of metabolic challenges, as both traditional moderate-intensity endurance (ET) and high-intensity interval training (HIIT) increases oxidative potential in a coordinated manner. Although these responses have been clearly demonstrated in healthy individuals, it remains to be determined whether both produce similar responses in the context of hypertension, one of the most prevalent and costly diseases worldwide. Therefore, in the current study, we used the Dahl sodium-sensitive rat, a model of hypertension, to determine the molecular responses to 4 wk of either ET or HIIT in the red (RG) and white gastrocnemius (WG) muscles. In the RG, both ET and HIIT increased the content of electron transport chain proteins and increased succinate dehydrogenase (SDH) content in type I fibers. Although both intensities of exercise shifted fiber type in RG (increased IIA, decreased IIX), only HIIT was associated with a reduction in endothelial nitric oxide synthase and an increase in HIF-1α proteins. In the WG, both ET and HIIT increased markers of the electron transport chain; however, HIIT decreased SDH content in a fiber-specific manner. ET increased type IIA, decreased IIB fibers, and increased capillarization, while, in contrast, HIIT increased the percentage of IIB fibers, decreased capillary-to-fiber ratios, decreased endothelial nitric oxide synthase, and increased hypoxia inducible factor-1α (HIF-1α) protein. Altogether, these data show that unlike in healthy animals, ET and HIIT have divergent effects in the skeletal muscle of hypertensive rats. This suggests ET may be optimal at improving the oxidative capacity of skeletal muscle in animals with hypertension.
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Affiliation(s)
- Tanya M. Holloway
- Department of Human Health and Nutritional Sciences, University of Guelph, Guelph, Ontario, Canada; and
| | - Darin Bloemberg
- Department of Kinesiology, University of Waterloo, Waterloo, Ontario, Canada
| | - Mayne L. da Silva
- Department of Human Health and Nutritional Sciences, University of Guelph, Guelph, Ontario, Canada; and
| | - Joe Quadrilatero
- Department of Kinesiology, University of Waterloo, Waterloo, Ontario, Canada
| | - Lawrence L. Spriet
- Department of Human Health and Nutritional Sciences, University of Guelph, Guelph, Ontario, Canada; and
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Aerobic exercise training as therapy for cardiac and cancer cachexia. Life Sci 2015; 125:9-14. [DOI: 10.1016/j.lfs.2014.11.029] [Citation(s) in RCA: 51] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/18/2014] [Revised: 11/12/2014] [Accepted: 11/25/2014] [Indexed: 01/03/2023]
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30
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Prognostic respiratory parameters in heart failure patients with and without exercise oscillatory ventilation — A systematic review and descriptive meta-analysis. Int J Cardiol 2015; 182:476-86. [DOI: 10.1016/j.ijcard.2015.01.029] [Citation(s) in RCA: 38] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/19/2014] [Revised: 01/06/2015] [Accepted: 01/10/2015] [Indexed: 12/21/2022]
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Seguchi O, Fujita T, Murata Y, Sunami H, Sato T, Watanabe T, Nakajima S, Kuroda K, Hisamatsu E, Sato T, Yanase M, Hata H, Wada K, Ishibashi-Ueda H, Kobayashi J, Nakatani T. Incidence, etiology, and outcome of primary graft dysfunction in adult heart transplant recipients: a single-center experience in Japan. Heart Vessels 2015; 31:555-62. [DOI: 10.1007/s00380-015-0649-1] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/25/2014] [Accepted: 02/06/2015] [Indexed: 01/29/2023]
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32
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Phillips SA, Vuckovic K, Cahalin LP, Baynard T. Defining the System: Contributors to Exercise Limitations in Heart Failure. Heart Fail Clin 2015; 11:1-16. [DOI: 10.1016/j.hfc.2014.08.009] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
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Stone JA, Hauer T, Haykowsky M, Aggarwal S. Exercise Therapy for Heart Failure Patients in Canada. Heart Fail Clin 2015; 11:83-8. [DOI: 10.1016/j.hfc.2014.08.011] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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Sung MM, Das SK, Levasseur J, Byrne NJ, Fung D, Kim TT, Masson G, Boisvenue J, Soltys CL, Oudit GY, Dyck JRB. Resveratrol treatment of mice with pressure-overload-induced heart failure improves diastolic function and cardiac energy metabolism. Circ Heart Fail 2014; 8:128-37. [PMID: 25394648 DOI: 10.1161/circheartfailure.114.001677] [Citation(s) in RCA: 70] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Abstract
BACKGROUND Although resveratrol has multiple beneficial cardiovascular effects, whether resveratrol can be used for the treatment and management of heart failure (HF) remains unclear. In the current study, we determined whether resveratrol treatment of mice with established HF could lessen the detrimental phenotype associated with pressure-overload-induced HF and identified physiological and molecular mechanisms contributing to this. METHODS AND RESULTS C57Bl/6 mice were subjected to either sham or transverse aortic constriction surgery to induce HF. Three weeks post surgery, a cohort of mice with established HF (% ejection fraction <45) was administered resveratrol (≈320 mg/kg per day). Despite a lack of improvement in ejection fraction, resveratrol treatment significantly increased median survival of mice with HF, lessened cardiac fibrosis, reduced gene expression of several disease markers for hypertrophy and extracellular matrix remodeling that were upregulated in HF, promoted beneficial remodeling, and improved diastolic function. Resveratrol treatment of mice with established HF also restored the levels of mitochondrial oxidative phosphorylation complexes, restored cardiac AMP-activated protein kinase activation, and improved myocardial insulin sensitivity to promote glucose metabolism and significantly improved myocardial energetic status. Finally, noncardiac symptoms of HF, such as peripheral insulin sensitivity, vascular function, and physical activity, were improved with resveratrol treatment. CONCLUSIONS Resveratrol treatment of mice with established HF lessens the severity of the HF phenotype by lessening cardiac fibrosis, improving molecular and structural remodeling of the heart, and enhancing diastolic function, vascular function, and energy metabolism.
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Affiliation(s)
- Miranda M Sung
- From the Department of Pediatrics, Cardiovascular Research Centre (M.M.S., N.J.B., D.F., T.T.K., G.M., J.B., C.-L.S., J.R.B.D.) and Department of Medicine (S.K.D., G.Y.O.), Mazankowski Alberta Heart Institute, Faculty of Medicine and Dentistry, University of Alberta, Edmonton, Alberta, Canada; and Alberta HEART, AHFMR Interdisciplinary Team Grant, Edmonton, Alberta, Canada (M.M.S., J.L., G.Y.O., J.R.B.D.)
| | - Subhash K Das
- From the Department of Pediatrics, Cardiovascular Research Centre (M.M.S., N.J.B., D.F., T.T.K., G.M., J.B., C.-L.S., J.R.B.D.) and Department of Medicine (S.K.D., G.Y.O.), Mazankowski Alberta Heart Institute, Faculty of Medicine and Dentistry, University of Alberta, Edmonton, Alberta, Canada; and Alberta HEART, AHFMR Interdisciplinary Team Grant, Edmonton, Alberta, Canada (M.M.S., J.L., G.Y.O., J.R.B.D.)
| | - Jody Levasseur
- From the Department of Pediatrics, Cardiovascular Research Centre (M.M.S., N.J.B., D.F., T.T.K., G.M., J.B., C.-L.S., J.R.B.D.) and Department of Medicine (S.K.D., G.Y.O.), Mazankowski Alberta Heart Institute, Faculty of Medicine and Dentistry, University of Alberta, Edmonton, Alberta, Canada; and Alberta HEART, AHFMR Interdisciplinary Team Grant, Edmonton, Alberta, Canada (M.M.S., J.L., G.Y.O., J.R.B.D.)
| | - Nikole J Byrne
- From the Department of Pediatrics, Cardiovascular Research Centre (M.M.S., N.J.B., D.F., T.T.K., G.M., J.B., C.-L.S., J.R.B.D.) and Department of Medicine (S.K.D., G.Y.O.), Mazankowski Alberta Heart Institute, Faculty of Medicine and Dentistry, University of Alberta, Edmonton, Alberta, Canada; and Alberta HEART, AHFMR Interdisciplinary Team Grant, Edmonton, Alberta, Canada (M.M.S., J.L., G.Y.O., J.R.B.D.)
| | - David Fung
- From the Department of Pediatrics, Cardiovascular Research Centre (M.M.S., N.J.B., D.F., T.T.K., G.M., J.B., C.-L.S., J.R.B.D.) and Department of Medicine (S.K.D., G.Y.O.), Mazankowski Alberta Heart Institute, Faculty of Medicine and Dentistry, University of Alberta, Edmonton, Alberta, Canada; and Alberta HEART, AHFMR Interdisciplinary Team Grant, Edmonton, Alberta, Canada (M.M.S., J.L., G.Y.O., J.R.B.D.)
| | - Ty T Kim
- From the Department of Pediatrics, Cardiovascular Research Centre (M.M.S., N.J.B., D.F., T.T.K., G.M., J.B., C.-L.S., J.R.B.D.) and Department of Medicine (S.K.D., G.Y.O.), Mazankowski Alberta Heart Institute, Faculty of Medicine and Dentistry, University of Alberta, Edmonton, Alberta, Canada; and Alberta HEART, AHFMR Interdisciplinary Team Grant, Edmonton, Alberta, Canada (M.M.S., J.L., G.Y.O., J.R.B.D.)
| | - Grant Masson
- From the Department of Pediatrics, Cardiovascular Research Centre (M.M.S., N.J.B., D.F., T.T.K., G.M., J.B., C.-L.S., J.R.B.D.) and Department of Medicine (S.K.D., G.Y.O.), Mazankowski Alberta Heart Institute, Faculty of Medicine and Dentistry, University of Alberta, Edmonton, Alberta, Canada; and Alberta HEART, AHFMR Interdisciplinary Team Grant, Edmonton, Alberta, Canada (M.M.S., J.L., G.Y.O., J.R.B.D.)
| | - Jamie Boisvenue
- From the Department of Pediatrics, Cardiovascular Research Centre (M.M.S., N.J.B., D.F., T.T.K., G.M., J.B., C.-L.S., J.R.B.D.) and Department of Medicine (S.K.D., G.Y.O.), Mazankowski Alberta Heart Institute, Faculty of Medicine and Dentistry, University of Alberta, Edmonton, Alberta, Canada; and Alberta HEART, AHFMR Interdisciplinary Team Grant, Edmonton, Alberta, Canada (M.M.S., J.L., G.Y.O., J.R.B.D.)
| | - Carrie-Lynn Soltys
- From the Department of Pediatrics, Cardiovascular Research Centre (M.M.S., N.J.B., D.F., T.T.K., G.M., J.B., C.-L.S., J.R.B.D.) and Department of Medicine (S.K.D., G.Y.O.), Mazankowski Alberta Heart Institute, Faculty of Medicine and Dentistry, University of Alberta, Edmonton, Alberta, Canada; and Alberta HEART, AHFMR Interdisciplinary Team Grant, Edmonton, Alberta, Canada (M.M.S., J.L., G.Y.O., J.R.B.D.)
| | - Gavin Y Oudit
- From the Department of Pediatrics, Cardiovascular Research Centre (M.M.S., N.J.B., D.F., T.T.K., G.M., J.B., C.-L.S., J.R.B.D.) and Department of Medicine (S.K.D., G.Y.O.), Mazankowski Alberta Heart Institute, Faculty of Medicine and Dentistry, University of Alberta, Edmonton, Alberta, Canada; and Alberta HEART, AHFMR Interdisciplinary Team Grant, Edmonton, Alberta, Canada (M.M.S., J.L., G.Y.O., J.R.B.D.)
| | - Jason R B Dyck
- From the Department of Pediatrics, Cardiovascular Research Centre (M.M.S., N.J.B., D.F., T.T.K., G.M., J.B., C.-L.S., J.R.B.D.) and Department of Medicine (S.K.D., G.Y.O.), Mazankowski Alberta Heart Institute, Faculty of Medicine and Dentistry, University of Alberta, Edmonton, Alberta, Canada; and Alberta HEART, AHFMR Interdisciplinary Team Grant, Edmonton, Alberta, Canada (M.M.S., J.L., G.Y.O., J.R.B.D.).
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Duppen N, Kapusta L, de Rijke YB, Snoeren M, Kuipers IM, Koopman LP, Blank AC, Blom NA, Dulfer K, Utens EMWJ, Hopman MTE, Helbing WA. The effect of exercise training on cardiac remodelling in children and young adults with corrected tetralogy of Fallot or Fontan circulation: a randomized controlled trial. Int J Cardiol 2014; 179:97-104. [PMID: 25464424 DOI: 10.1016/j.ijcard.2014.10.031] [Citation(s) in RCA: 35] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/14/2014] [Revised: 10/13/2014] [Accepted: 10/18/2014] [Indexed: 12/01/2022]
Abstract
BACKGROUND Exercise can improve physical fitness in children and adults with congenital heart disease. We hypothesized that exercise training would not lead to adverse cardiac remodelling in this population. METHODS AND RESULTS This multi-centre randomized controlled trial included children and young adults (10 to 25 years) with either corrected tetralogy of Fallot or Fontan circulation. The exercise-group was enrolled in a 12 week standardized aerobic dynamic exercise training program. The control-group continued their life-style and received care as usual. Both groups underwent cardiopulmonary exercise testing, cardiac magnetic resonance imaging (MRI), echocardiography and neurohormonal assessment, within 2 weeks before and 2 weeks after the intervention period. Fifty-six patients were randomized to the exercise-group and 37 to the control-group. We assessed changes between the pre- and the post-intervention period for the exercise group compared to the changes in the control-group. Peak load increased significantly in the exercise-group compared to the control-group (exercise-group 6.9 ± 11.8 W; control-group 0.8 ± 13.9 W; p=0.047). There were no adverse events linked to the study. Ventricular systolic parameters, cardiac dimensions and neurohormonal markers during follow-up did not change in patients allocated to the exercise-group and control-group. Although there were some isolated minor changes in inflow parameters, there was no consistent pattern of changes, indicating a lack of true change in the diastolic function. CONCLUSION We demonstrated that no clinically relevant adverse cardiac remodelling occurred after 12 weeks of exercise training in patients with either corrected tetralogy of Fallot or Fontan circulation. CLINICAL TRIAL REGISTRATION www.trialregister.nl, identification NTR2731.
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Affiliation(s)
- N Duppen
- Department of Paediatrics, Division of Cardiology, Erasmus MC-Sophia Children's Hospital Rotterdam, The Netherlands; Departments of Radiology, Erasmus MC, Rotterdam, The Netherlands
| | - L Kapusta
- Department of Paediatric Cardiology, Radboud University Nijmegen Medical Centre, Nijmegen, The Netherlands; Department of Paediatrics, Paediatric Cardiology unit, Tel-Aviv Sourasky Medical Centre, Tel Aviv University, Israel
| | - Y B de Rijke
- Department of Clinical Chemistry, Erasmus MC, Rotterdam, The Netherlands; Department of Internal Medicine, Erasmus MC, Rotterdam, The Netherlands
| | - M Snoeren
- Department of Radiology, Radboud University Nijmegen Medical Centre, Nijmegen, The Netherlands
| | - I M Kuipers
- Department of Paediatric Cardiology, Academic Medical Centre, Amsterdam, The Netherlands
| | - L P Koopman
- Department of Paediatrics, Division of Cardiology, Erasmus MC-Sophia Children's Hospital Rotterdam, The Netherlands
| | - A C Blank
- Department of Paediatric Cardiology, University MC Utrecht-Wilhelmina Children's Hospital, Utrecht, The Netherlands
| | - N A Blom
- Department of Paediatric Cardiology, Leiden University Medical Centre, Leiden, The Netherlands
| | - K Dulfer
- Department of Child and Adolescent Psychiatry/Psychology, Erasmus MC-Sophia Children's Hospital, Rotterdam, The Netherlands
| | - E M W J Utens
- Department of Child and Adolescent Psychiatry/Psychology, Erasmus MC-Sophia Children's Hospital, Rotterdam, The Netherlands
| | - M T E Hopman
- Department of Integrative Physiology, Radboud University Nijmegen Medical Centre, Nijmegen, The Netherlands
| | - W A Helbing
- Department of Paediatrics, Division of Cardiology, Erasmus MC-Sophia Children's Hospital Rotterdam, The Netherlands; Departments of Radiology, Erasmus MC, Rotterdam, The Netherlands.
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Gielen S, Laughlin MH, O'Conner C, Duncker DJ. Exercise training in patients with heart disease: review of beneficial effects and clinical recommendations. Prog Cardiovasc Dis 2014; 57:347-55. [PMID: 25459973 DOI: 10.1016/j.pcad.2014.10.001] [Citation(s) in RCA: 111] [Impact Index Per Article: 11.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/14/2023]
Abstract
Over the last decades exercise training has evolved into an established evidence-based therapeutic strategy with prognostic benefits in many cardiovascular diseases (CVDs): In stable coronary artery disease (CAD) exercise training attenuates disease progression by beneficially influencing CVD risk factors (i.e., hyperlipidemia, hypertension) and coronary endothelial function. In heart failure (HF) with reduced ejection fraction (HFrEF) training prevents the progressive loss of exercise capacity by antagonizing peripheral skeletal muscle wasting and by promoting left ventricular reverse remodeling with reduction in cardiomegaly and improvement of ejection fraction. Novel areas for exercise training interventions include HF with preserved ejection fraction (HFpEF), pulmonary hypertension, and valvular heart disease. In HFpEF, randomized studies indicate a lusitropic effect of training on left ventricular diastolic function associated with symptomatic improvement of exercise capacity. In pulmonary hypertension, reductions in pulmonary artery pressure were observed following endurance exercise training. Recently, innovative training methods such as high-intensity interval training, resistance training and others have been introduced. Although their prognostic value still needs to be determined, these approaches may achieve superior improvements in aerobic exercise capacity and gain in muscle mass, respectively. In this review, we give an overview of the prognostic and symptomatic benefits of exercise training in the most common cardiac disease entities. Additionally, key guideline recommendations for the initiation of training programs are summarized.
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Affiliation(s)
- Stephan Gielen
- Martin-Luther-University Halle/Wittenberg, University Hospital, Dept. of Int. Medicine III, Halle/Saale, Germany.
| | - M Harold Laughlin
- Dalton Cardiovascular Research Center, Departments of Biomedical Sciences and Medical Pharmacology and Physiology, University of Missouri, Columbia, MO, USA
| | | | - Dirk J Duncker
- Division of Experimental Cardiology, Department of Cardiology, Thoraxcenter Erasmus MC University Medical Center Rotterdam, PO Box 2040, 3000, Rotterdam, CA, The Netherlands
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Yan L, Vatner SF, Vatner DE. Disruption of type 5 adenylyl cyclase prevents β-adrenergic receptor cardiomyopathy: a novel approach to β-adrenergic receptor blockade. Am J Physiol Heart Circ Physiol 2014; 307:H1521-8. [PMID: 25193472 DOI: 10.1152/ajpheart.00491.2014] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Abstract
β-Adrenergic receptor (β-AR) blockade is widely used to treat heart failure, since the adverse effects of chronic β-AR stimulation are central to the pathogenesis of this disease state. Transgenic (Tg) mice, where β-AR signaling is chronically enhanced by overexpression of cardiac β₂-ARs, is a surrogate for this mechanism, since these mice develop cardiomyopathy as reflected by reduced left ventricular (LV) function, increased fibrosis, apoptosis, and myocyte hypertrophy. We hypothesized that disruption of type 5 adenylyl cyclase (AC5), which is in the β-AR signaling pathway in the heart, but exerts only a minor β-AR blocking effect, could prevent the cardiomyopathy in β₂-AR Tg mice without the negative effects of full β-AR blockade. Accordingly, we mated β₂-AR Tg mice with AC5 knockout (KO) mice. The β₂-AR Tg × AC5 KO bigenic mice prevented the cardiomyopathy as reflected by improved LV ejection fraction, reduced apoptosis, fibrosis, and myocyte size and preserved exercise capacity. The rescue was not simply due to a β-blocking effect of AC5 KO, since neither baseline LV function nor the response to isoproterenol was diminished substantially compared with the negative inotropic effects of β-blockade. However, AC5 disruption in β₂-AR Tg activates the antioxidant, manganese superoxide dismutase, an important mechanism protecting the heart from cardiomyopathy. These results indicate that disruption of AC5 prevents the cardiomyopathy induced by chronically enhanced β-AR signaling in mice with overexpressed β₂-AR, potentially by enhancing resistance to oxidative stress and apoptosis, suggesting a novel, alternative approach to β-AR blockade.
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Affiliation(s)
- Lin Yan
- Departments of Cell Biology and Molecular Medicine and Medicine and the Cardiovascular Research Institute, Rutgers University-New Jersey Medical School, Newark, New Jersey
| | - Stephen F Vatner
- Departments of Cell Biology and Molecular Medicine and Medicine and the Cardiovascular Research Institute, Rutgers University-New Jersey Medical School, Newark, New Jersey
| | - Dorothy E Vatner
- Departments of Cell Biology and Molecular Medicine and Medicine and the Cardiovascular Research Institute, Rutgers University-New Jersey Medical School, Newark, New Jersey
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Karavidas A, Driva M, Parissis JT, Farmakis D, Mantzaraki V, Varounis C, Paraskevaidis I, Ikonomidis I, Pirgakis V, Anastasiou-Nana M, Filippatos G. Functional electrical stimulation of peripheral muscles improves endothelial function and clinical and emotional status in heart failure patients with preserved left ventricular ejection fraction. Am Heart J 2013; 166:760-7. [PMID: 24093858 DOI: 10.1016/j.ahj.2013.06.021] [Citation(s) in RCA: 39] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/27/2013] [Accepted: 06/29/2013] [Indexed: 01/17/2023]
Abstract
BACKGROUND Functional electrical stimulation (FES) improves exercise capacity, quality of life, emotional stress, and endothelial function in chronic heart failure with impaired systolic function. We sought to investigate the effects of FES on the above parameters in patients with preserved ejection fraction (HFpEF). METHODS Thirty HFpEF patients, 18 female and 12 male, aged 69 ± 8 years, in New York Heart Association class II or III and with mean ejection fraction 63% ± 6%, were randomly (1:1) assigned to a 6-week FES program or placebo. Assessment was performed at baseline and after completion of training protocol and included 6-minute walked distance, quality of life (Kansas City Cardiomyopathy Questionnaire and Minnesota Living with Heart Failure Questionnaire), depressive symptoms (Beck Depression Inventory and Zung self-rated depression scores), B-type natriuretic peptide, endothelial function (flow-mediated dilatation), and left ventricular diastolic function. RESULTS A significant improvement in 6-minute walked distance (F = 21.61, P = .001), Kansas City Cardiomyopathy Questionnaire summary (F = 8.68, P = .006), Minnesota Living with Heart Failure Questionnaire (F = 6.43, P = .017), Beck Depression Inventory (F = 6.66, P = .015), Zung (F = 6.25, P = .019), and flow-mediated dilatation diameter (F = 11.98, P = .002) was observed in the FES group compared with placebo group; B-type natriuretic peptide also declined but not significantly (F = 0.249, P = .622), and there was a tendency toward lower mitral E/e' wave ratio (F = 3.066, P = .091). CONCLUSION As in heart failure and reduced left ventricular ejection fraction, FES also improves exercise capacity, quality of life, emotional status, and endothelial function in HFpEF. Given the lack of effective evidence-based therapies in these patients, FES warrants further investigation.
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Masutani S, Cheng HJ, Morimoto A, Hasegawa H, Han QH, Little WC, Cheng CP. β3-Adrenergic receptor antagonist improves exercise performance in pacing-induced heart failure. Am J Physiol Heart Circ Physiol 2013; 305:H923-30. [PMID: 23873794 PMCID: PMC3761346 DOI: 10.1152/ajpheart.00371.2012] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/09/2012] [Accepted: 07/13/2013] [Indexed: 11/22/2022]
Abstract
In heart failure (HF), the impaired left ventricular (LV) arterial coupling and diastolic dysfunction present at rest are exacerbated during exercise. We have previously shown that in HF at rest stimulation of β3-adrenergic receptors by endogenous catecholamine depresses LV contraction and relaxation. β3-Adrenergic receptors are activated at higher concentrations of catecholamine. Thus exercise may cause increased stimulation of cardiac β3-adrenergic receptors and contribute to this abnormal response. We assessed the effect of L-748,337 (50 μg/kg iv), a selective β3-adrenergic receptor antagonist (β3-ANT), on LV dynamics during exercise in 12 chronically instrumented dogs with pacing-induced HF. Compared with HF at rest, exercise increased LV end-systolic pressure (PES), minimum LV pressure (LVPmin), and the time constant of LV relaxation (τ) with an upward shift of early diastolic portion of LV pressure-volume loop. LV contractility decreased and arterial elastance (EA) increased. LV arterial coupling (EES/EA) (0.40 vs. 0.51) was impaired. Compared with exercise in HF preparation, exercise after β3-ANT caused similar increases in heart rate and PES but significantly decreased τ (34.9 vs. 38.3 ms) and LVPmin with a downward shift of the early diastolic portion of LV pressure-volume loop and further augmented dV/dtmax. Both EES and EES/EA (0.68 vs. 0.40) were increased. LV mechanical efficiency improved from 0.39 to 0.53. In conclusion, after HF, β3-ANT improves LV diastolic filling; increases LV contractility, LV arterial coupling, and mechanical efficiency; and improves exercise performance.
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Affiliation(s)
- Satoshi Masutani
- Cardiology Section, Wake Forest School of Medicine, Winston-Salem, North Carolina
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