Is Exercise Training Appropriate for Patients With Advanced Heart Failure Receiving Continuous Inotropic Infusion? A Review

Exercise-based rehabilitation programs have been reported to have beneficial effects for patients with heart failure. However, there is little evidence about whether this is the case in patients with more severe heart failure. In particular, there is a question in the clinical setting whether patients with advanced heart failure and continuous inotropic infusion should be prescribed exercise training. In contrast, many studies conclude that prolonged immobility associated with heart failure profoundly impairs physical function and promotes muscle wasting that could further hasten the course of heart failure. By contrast, exercise training has various effects not only in improving exercise capacity but also on vascular function, skeletal muscle, and autonomic balance. In this review, we summarize the effectiveness and discuss methods of exercise training in patients with advanced heart failure receiving continuous inotropic agents such as dobutamine

Influence of atrial fibrillation on oxygen uptake and exercise tolerance in cardiovascular patients; close association with heart rate response

To investigate the effect of atrial fibrillation (AF) on the oxygen uptake and exercise tolerance, we evaluated cardiopulmonary exercise test (CPET) data in AF patients and heart rate-matched controls with sinus rhythm (cSR) who received ambulatory cardiac rehabilitation. We compared CPET data between AF (N = 27) and cSR patients (N = 106) who had similar HRs at rest and the peak points. Oxygen uptake (VO2)/kg and relative O2 pulse (ml/bpm/kg) at rest and the anaerobic threshold (AT) level was not different between AF and cSR patients, but these parameters above the AT level were significantly lower in AF than in cSR patients. Concisely the parallel increase of relative O2 pulse during exercise was blunted above the respiratory compensation level (Rc) in the AF group. In addition, the HR change during exercise was inversely correlated with the increase of the O2 pulse above the AT level and this inverse correlation was more prominent in AF patients than in cSR patients. In conclusion, the value of VO2 was significantly lower above the AT level in AF patients. The trend of O2 pulse above the AT level was strongly associated with the detrimental response of HR increase and the response was markedly exaggerated in the AF patients. Keywords: Atrial fibrillation, Oxygen uptake, O2 pulse, Heart rate response, Hemodynamic tren

Efficacy and Safety of Remote Cardiac Rehabilitation in the Recovery Phase of Cardiovascular Diseases: Protocol for a Multicenter, Nonrandomized, Single-Arm, Interventional Trial

BackgroundConventional group-based outpatient cardiac rehabilitation through monitoring and center-based approaches for patients in the recovery phase has shown strong evidence for the prevention of cardiovascular diseases. However, there are some cases in which maintaining attendance of center-based cardiac rehabilitation is difficult. ObjectiveThis study aims to ascertain the safety and efficacy of remote cardiac rehabilitation (RCR) in the recovery phase in patients with cardiovascular disease. MethodsPatients satisfying the study criteria will be recruited from multiple institutions (approximately 30) across Japan. In total, 75 patients (approximately 2 or 3 patients from each institution) are proposed to be recruited. Patients enrolled in the RCR group will be lent devices necessary for RCR (including calibrated ergometers and tablets). Patients will perform anaerobic exercise at home using ergometer for 30-40 minutes at least 3 times weekly. During exercise, an instructor will monitor the patient in real time (using interactive video tools and monitoring tools for various vital data). Moreover, educational instructions will be given 3 times weekly using e-learning methods. ResultsThe primary endpoint is the peak oxygen uptake 2-3 months from the start of exercise or 6-min walk test. The extracted data will be compared between RCR patients and controls without RCR. ConclusionsThe establishment of the system of RCR proposed in this study will lead to the development of more extensive applications, which have been insufficient through conventional interventions. Trial RegistrationUniversity Hospital Medical Information Network—Clinical Trials Registry UMIN–CTR UMIN000042942; https://upload.umin.ac.jp/cgi-open-bin/ctr_e/ctr_view.cgi?recptno=R000048983 International Registered Report Identifier (IRRID)DERR1-10.2196/3072

An exploratory study on the efficacy and safety of a BCAA preparation used in combination with cardiac rehabilitation for patients with chronic heart failure

Abstract Background Sarcopenia is generally complicated with patients with chronic heart failure (CHF) and its presence negatively affects the course of heart failure, however effective nutritional intervention had not been elucidated yet. The primary objective of this study is to explore whether the addition of a branched-chain amino acid (BCAA) preparation for cardiac rehabilitation (CR) of patients with CHF further improves cardiopulmonary functions, skeletal muscle functions, and metabolism in comparison with conventional CR. Methods This is a randomized, parallel-group comparative study. The elderly patients that were participated in CR and complicated with left ventricular systolic or diastolic dysfunction are randomized into two groups, CR + BCAA and CR. 20 weeks later, the second randomization is performed, which divide subjects into two groups with and without BCAA intervention without CR. Primary outcome measure is the rate of change of the anaerobic threshold workload from baseline to post-intervention. Secondary outcome include parameters of exercise capacity, cardiac function and psychological status. Discussion In the current study the effect of a promising new intervention, BCAA, will be assessed to determine whether its addition to CR improve exercise capacity in patients with heart failure, who are generally complicated with sarcopenia. Trial registration This clinical trial was registered with the University Hospital Medical Information Network—Clinical Trials Registry (UMIN–CTR; JPRN–UMIN R000022440 )