Benefits of lifelong exercise training on left ventricular function after myocardial infarction. (November 2017)

• Record Type: Journal Article
• Authors: Maessen, Martijn FH; Eijsvogels, Thijs MH; Stevens, Guus; van Dijk, Arie PJ; Hopman, Maria TE
• Is Part Of: European journal of preventive cardiology. Volume 24:Number 17(2017)
• Page Start: 1856
• Page End: 1866
• Publication Date: 2017-11
• Subjects: Coronary artery disease -- physical activity -- echocardiography -- secondary prevention; Cardiovascular system -- Diseases -- Prevention -- Periodicals; Cardiac patients -- Rehabilitation -- Periodicals; 616.12
• DOI: 10.1177/2047487317728765
• Languages: English
• ISSNs: 2047-4873

Abstract

Background: Endurance exercise training induces cardio-protective effects, but athletes are not exempted from a myocardial infarction. Evidence from animal studies suggests that exercise training attenuates pathological left ventricular remodelling following myocardial infarction. We tested the hypothesis that lifelong exercise training is related to attenuated pathological left ventricular remodelling after myocardial infarction as evidenced by better left ventricular systolic function in veteran athletes compared to sedentary peers. Design: This was a cross-sectional study. Methods: Sixty-five males (60 ± 6 years) were included and allocated to four groups based on lifelong exercise training volumes: (a) athletes ( n = 18), (b) post-myocardial infarction athletes (athletes + myocardial infarction, n = 20), (c) sedentary controls ( n = 13), and (d) post-myocardial infarction controls (sedentary controls + myocardial infarction, n = 14). Athletes were lifelong (≥20 years) highly physically active (≥30 metabolic equivalent of task (MET)-h/week), whereas sedentary controls did not meet the exercise guidelines (<10 MET-h/week) for the past 20 years. left ventricular systolic function, diastolic function and wall strain were measured using echocardiography. Results: Cardiac enzyme markers (creatine-kinase, creatinine, aspartate transaminase and lactate dehydrogenase) following myocardial infarction and infarct location did not differ between athletes + myocardial infarction and sedentary controls + myocardial infarction. Left ventricular ejection fraction was significantly higher in athletes (61% ± 4), athletes + myocardial infarction (58% ± 4) and sedentary controls (57% ± 6) compared to sedentary controls + myocardial infarction (51% ± 7; p < 0.01). Left ventricular circumferential strain was superior in athletes (–19% (–21% to –17%), athletes + myocardial infarction (–16% (–20% to –12%)), and sedentary controls (–15% (–18% to –14%) compared to sedentary controls + myocardial infarction (–13% (–15% to –8%), p < 0.01). Diastolic function parameters did not differ across groups. Conclusion: These findings suggest that lifelong exercise training may preserve left ventricular systolic function and possibly attenuates or minimises the deleterious effects of pathological post-myocardial infarction left ventricular remodelling in veteran athletes.