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Exercise-based rehabilitation for coronary heart disease
J A Jolliffe1, K Rees, R S Taylor
1Research and Development Support Unit, Noy Scott House, Haldon View terrace, Exeter, Devon, UK, EX2 5EQ. jajollif@exeter.ac.uk
The Cochrane Database of Systematic Reviews
|October 18, 2000
Summary
Exercise-based cardiac rehabilitation significantly reduces cardiac deaths. However, trial quality is poor, and benefits for comprehensive programs over exercise alone remain unclear for diverse patient groups.
Area of Science:
- Cardiology
- Public Health
- Evidence-Based Medicine
Background:
- Cardiovascular diseases, including myocardial infarction (MI) and stroke, are leading global causes of mortality.
- Cardiac rehabilitation programs aim to improve patient outcomes post-MI through exercise or comprehensive interventions.
- Previous meta-analyses suggested a 20-25% reduction in mortality with exercise-based cardiac rehabilitation, but with methodological limitations.
Purpose of the Study:
- To evaluate the effectiveness of exercise-only versus comprehensive cardiac rehabilitation compared to usual care.
- To assess impacts on mortality, morbidity, health-related quality of life (HRQoL), and cardiac risk factors.
- To synthesize data from a larger patient cohort than previously studied.
Main Methods:
- Systematic review and meta-analysis of randomized controlled trials (RCTs) published up to December 31st, 1998.
- Included patients with coronary heart disease (post-MI, CABG, PTCA, angina, or angiographically defined CAD) of all ages and genders.
- Excluded studies on heart transplant, valve surgery, or heart failure patients, and those with follow-up < 6 months.
Main Results:
- Analysis included 7683 patients; exercise-only rehabilitation showed a 27% reduction in all-cause mortality (OR 0.73) and 31% in cardiac mortality (OR 0.69).
- Comprehensive cardiac rehabilitation showed a trend towards reduced all-cause mortality (OR 0.87) and a 26% reduction in cardiac mortality (OR 0.74).
- Neither intervention impacted non-fatal MI; comprehensive rehabilitation significantly reduced total cholesterol and LDL, but HRQoL data was inconclusive due to heterogeneity.
Conclusions:
- Exercise-based cardiac rehabilitation is effective in reducing cardiac mortality, though the evidence is limited by poor trial quality.
- The comparative benefit of exercise-only versus comprehensive cardiac rehabilitation remains uncertain.
- The study population remains predominantly middle-aged, low-risk males, highlighting a need for broader inclusion criteria in future research.