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The investigators propose a pilot randomized controlled trial to determine the safety and potential benefits of moderate intensity exercise in patients with hypertrophic cardiomyopathy. The investigators hypotheses are that exercise parameters derived from a baseline cardiopulmonary exercise test will target an appropriately safe level of exercise intensity that will not cause significant arrhythmias or exacerbate symptoms and that exercise training for 4 months will result in significant improvements in peak oxygen consumption and quality of life, with neutral effects on the clinical characteristics.
The goal of this randomized clinical pilot trial is to establish the safety profile and potential benefits of moderate intensity exercise in patients with hypertrophic cardiomyopathy (HCM). Participation in competitive athletics is associated with an increased risk of sudden cardiac death (SCD) in individuals with structural heart disease, including HCM. This has appropriately led to the establishment of national guidelines based on expert opinion that discourage participation in high intensity competitive sports, burst exertion (e.g., sprinting), or isometric exercise (e.g., heavy lifting). Non-competitive, low to moderate intensity exercise is allowable, although many physicians and HCM patients are still understandably apprehensive. Data on the safety of a recreational exercise program, and how to gauge appropriate intensity level, are desperately needed so that HCM patients can reap the well established health benefits of regular physical activity. Limited, but compelling animal data suggest that moderate intensity exercise is not only safe, but may also prevent or even reverse cardiac hypertrophy, fibrosis, myocellular disarray, and apoptosis associated with HCM. There are no published studies on exercise in patients with HCM, although large clinical trials in heart failure have shown exercise training to be safe, to improve functional capacity and quality of life, and to lower cardiovascular mortality. The pilot randomized control trial proposed here is the first to determine the safety of moderate intensity exercise training and explore its potential benefits in patients with HCM.
Allocation: Randomized, Control: Placebo Control, Endpoint Classification: Efficacy Study, Intervention Model: Parallel Assignment, Masking: Open Label, Primary Purpose: Supportive Care
Moderate intensity exercise training, Usual Activity
University of Michigan
Published on BioPortfolio: 2014-07-23T21:09:01-0400
Although current clinical guidelines stipulate that patients with hypertrophic cardiomyopathy should not partake in high intensity exercise (HIE) or competitive sport due to safety concern...
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Study evaluate the relationships between daily physical activity levels (PAL) and functional capacity (VO2peak) in patients with hypertrophic cardiomyopathy (HCM)
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Usual level of physical activity that is less than 30 minutes of moderate-intensity activity on most days of the week.
An autosomal dominant inherited form of HYPERTROPHIC CARDIOMYOPATHY. It results from any of more than 50 mutations involving genes encoding contractile proteins such as VENTRICULAR MYOSINS; cardiac TROPONIN T; ALPHA-TROPOMYOSIN.
A group of diseases in which the dominant feature is the involvement of the CARDIAC MUSCLE itself. Cardiomyopathies are classified according to their predominant pathophysiological features (DILATED CARDIOMYOPATHY; HYPERTROPHIC CARDIOMYOPATHY; RESTRICTIVE CARDIOMYOPATHY) or their etiological/pathological factors (CARDIOMYOPATHY, ALCOHOLIC; ENDOCARDIAL FIBROELASTOSIS).
Controlled physical activity, more strenuous than at rest, which is performed in order to allow assessment of physiological functions, particularly cardiovascular and pulmonary, but also aerobic capacity. Maximal (most intense) exercise is usually required but submaximal exercise is also used. The intensity of exercise is often graded, using criteria such as rate of work done, oxygen consumption, and heart rate.
A cardiovascular exercise strategy with alternating short periods of intense anaerobic exercise with less-intense recovery periods.