Key result
Vigorous physical activity was associated with significantly better flow-mediated dilation (8.2% vs 1.9%, p<0.001) and lower pulse wave velocity (6.1 vs 6.9 m/s, p=0.004) compared to low physical activity in patients after myocardial infarction.
Why the study?
Patients after myocardial infarction have impaired vascular function, but data on the effects of physical activity level on endothelial function and arterial stiffness remain scarce.
Does physical activity level affect endothelial function and arterial stiffness in patients after myocardial infarction?
Cross-Sectional (n=108)
No
Does physical activity level affect endothelial function and arterial stiffness in patients after myocardial infarction?
Absolute Event Rate: 8.2% vs 1.9%
p-value: p=<0.001
Higher physical activity levels are associated with better endothelial function and lower arterial stiffness in patients after myocardial infarction.
May support activity counseling post-MI; leaves open causal confirmation in prospective trials.
Background: Patients after myocardial infarction have impaired vascular function. However, effects of lifestyle, e.g., physical activity level, on endothelial function and arterial stiffness remain scarce. The aim of our study was to investigate effects of physical activity level and risk factors on endothelial function and arterial stiffness. Methods: In this cross-sectional study, we ultrasonographically assessed parameters of vascular function, namely flow mediated dilation (FMD) of the brachial artery and carotid artery stiffness in patients after myocardial infarction referred to the cardiac rehabilitation. The International Physical Activity Questionnaire (IPAQ) was obtained from all participants. Based on the IPAQ, patients were classified into three groups: vigorous, moderate, and low physical activity engagement. ANOVA was used for comparison among three groups using Bonferroni correction to determine differences between two sub-groups. Results: One hundred and eight patients after myocardial infarction (mean age 53 ± 10 years) were included. There were significant differences in terms of FMD (8.2 vs. 4.2 vs. 1.9%, p < 0.001) and pulse wave velocity (PWV), a measure of arterial stiffness (6.1 vs. 6.4 vs. 6.9 m/s, p = 0.004) among groups of vigorous, moderate, and low physical activity engagement, respectively. However, in younger patients only FMD remained associated with physical activity level, while arterial stiffness was not. Low physical activity engagement was a significant predictor of both FMD and PWV in univariate and multivariate models, adjusted for age, sex, and other risk factors. Conclusion: Low physical activity level is associated with impaired endothelial function and increased arterial stiffness in patients after myocardial infarction. Future studies are warranted to address this issue in a context of cardiac rehabilitation protocols optimization in order to improve vascular function in these patients.
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Tršan et al. (2021) conducted a cross-sectional in Myocardial infarction (n=108). Physical activity level vs. Low physical activity was evaluated on Flow mediated dilation (FMD) (p=<0.001). Vigorous physical activity was associated with significantly better flow-mediated dilation (8.2% vs 1.9%, p<0.001) and lower pulse wave velocity (6.1 vs 6.9 m/s, p=0.004) compared to low physical activity in patients after myocardial infarction.
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