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Sophia Antipolis, 12 April 2017: Exercise is associated with improved survival after a heart attack, according to research published today in the European Journal of Preventive Cardiology.1 The chances of survival increased as the amount of exercise rose.
“We know that exercise protects people against having a heart attack,” said last author Professor Eva Prescott, professor of cardiovascular prevention and rehabilitation, University of Copenhagen, Denmark. “Animal studies suggest that myocardial infarctions are smaller and less likely to be fatal in animals that exercise. We wanted to see if exercise was linked with less serious myocardial infarctions in people.”
The study included 14 223 participants of the Copenhagen City Heart Study who had never had a heart attack or stroke. Levels of physical activity were assessed at baseline in 1976–1978 and classified as sedentary, light, moderate, or high.2
Participants were followed through registries until 2013. A total of 1 664 participants had a myocardial infarction, of whom 425 died immediately.
The investigators compared levels of physical activity between those who died immediately from their myocardial infarction and those who survived. They found that patients who exercised were less likely to die from their myocardial infarction.
There was a dose-response relationship between exercise and death from myocardial infarction. Patients with light or moderate/high physical activity levels were 32% and 47% less likely to die from their myocardial infarction, respectively, than sedentary patients.
Professor Prescott said: “Patients who were sedentary were more likely to die when they got a myocardial infarction and patients who did exercise were more likely to survive. There was also a dose-response relationship, so that the odds of dying if people got a myocardial infarction declined with the level of exercise they did, reaching an almost 50% reduction for those who were the most physically active.”
“One possible explanation is that people who exercise may develop collateral blood vessels in the heart which ensure the heart continues to get enough blood after a blockage,” she continued. “Exercise may also increase levels of chemical substances that improve blood flow and reduce injury to the heart from a heart attack.”
Professor Prescott said: “This was an observational study so we cannot conclude that the associations are causal. The results need to be confirmed before we can make strong recommendations. But I think it’s safe to say that we already knew exercise was good for health and this might indicate that continuing to exercise even after developing atherosclerosis may reduce the seriousness of a heart attack if it does occur.”
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SOURCES OF FUNDING: None. DISCLOSURES: None.References and notes1Ejlersen H, et al. Prognostic impact of physical activity prior to myocardial infarction: Case fatality and subsequent risk of heart failure and death. European Journal of Preventive Cardiology. 2017. DOI: 10.1177/20474873177020462Exercise categories were defined as: sedentary (less than 2 hours a week), light (2–4 hours a week), moderate (more than 4 hours a week, or 2–4 hours of vigorous physical activity a week), high (more than 4 hours of vigorous physical activity a week).About the European Society of Cardiology
The ESC brings together health care professionals from more than 140 countries, working to advance cardiovascular medicine and help people to live longer, healthier lives.
About the European Journal of Preventive Cardiology
The European Journal of Preventive Cardiology is the world's leading preventive cardiology journal, playing a pivotal role in reducing the global burden of cardiovascular disease.
Our mission: To reduce the burden of cardiovascular disease
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