Acute Myocardial Infarction Clinical Trial
Official title:
High-Intensity Exercise Training in Cardiac Rehabilitation After Acute Coronary Event - Randomized Controlled Trial
Despite the well-known health benefits of physical exercise in the prevention of chronic diseases, less attention has been focused on the use of physical exercise as an essential part of good treatment for chronic disease. The aims of the study are to investigate the feasibility, medical effects, cost-effectiveness, and social perspectives of the individualized exercise-based rehabilitation [2 different high-intensity training (HIT) protocols combined with usual care (UC)] after acute coronary artery disease (CAD) event. The medical aim is to study mediating mechanisms of the physiological, biochemical and molecular effects of exercise training on the clinical outcomes. The aim of the health-economic evaluation is to assess the changes in the Health-Related Quality of Life (HRQL) and health care related costs for estimating the cost-effectiveness of HIT-based exercise rehabilitation. The purpose of the sociological analysis is to find out the social processes which make possible the emergence of the desired welfare effects.
The study population consists of patients living in the city of Kuopio or Siilinjarvi area
in Eastern Finland, who have been treated in Kuopio University Hospital because of acute CAD
event. After baseline measurements, the patients will be randomized into one of the 3
groups: short interval HIT protocol (HIT-S), long interval HIT protocol (HIT-L) or UC group.
The intervention will be 12 months per patient and the expected duration of the whole study
(intervention data collection) is estimated to be 4 years. In addition, all groups will have
annual follow-up examinations scheduled up to 60 months after initiation of the intervention
phase. The patients recruited for the study will be 750, a total of 250 patients per study
group.
All measurements related to intervention will be performed at Kuopio Research Institute of
Exercise Medicine. Examinations concerning myocardial structure and perfusion will be done
at Turku PET Center (subsample).
The study complies with the Helsinki declaration, follows good clinical practice. Patient
safety will follow normal medical practice. The intervention is not anticipated to cause
health risks apart from the conventional treatment. All participants will be provided with
diverse individualized information about their health and physical performance. The research
methods employed in the study are safe. Physician and nurse will be present at each occasion
when physically strenuous measurements are performed and careful provisions for appropriate
first aid will be made. The measurements assessing cardiorespiratory and muscular fitness
will involve hard effort and it is not unusual to feel innocent muscle pain for a few days
after measurements demanding maximal effort. The other potential acute complications may
include accidents (e.g. injuries due to slipping or falling) and medical emergencies like
acute myocardial infarction.
Study hypotheses:
1. Short (15 sec) and long interval (3 min) high-intensity aerobic interval training (HIT)
combined with resistance training after acute CAD event are equally effective in
improving cardiorespiratory fitness compared with UC.
2. Despite higher unit costs, the differences in health-related quality of life effects
are so large that both HIT interventions are cost-effective compared with UC.
3. Patient's experiences and interpretation of HIT exercise as well as different social
processes during rehabilitation explain the cost-effectiveness of the rehabilitation.
4. Patient groups who will or will not benefit of HIT interventions can be identified and
predicted.
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