Key result
Patients with anterior wall STEMI had lower multiscale entropy area 6-20 at 1 year compared to controls, demonstrating persistent changes in cardiac complexity.
Why the study?
Does heart rhythm complexity analysis using multiscale entropy and detrended fluctuation analysis differentiate post-STEMI patients from controls over a 1-year follow-up?
Observational (n=69)
No
Does heart rhythm complexity analysis using multiscale entropy and detrended fluctuation analysis differentiate post-STEMI patients from controls over a 1-year follow-up?
Non-linear heart rhythm complexity parameters, specifically multiscale entropy, show serial changes post-STEMI and improve the discrimination of post-MI patients from controls compared to traditional linear HRV parameters.
Answers are grounded in this paper and cite their sources.
Suggests non-linear heart rhythm complexity parameters may improve long-term post-STEMI risk.
Heart rhythm complexity analysis has been shown to have good prognostic power in patients with cardiovascular disease. The aim of this study was to analyze serial changes in heart rhythm complexity from the acute to chronic phase of acute myocardial infarction (MI). We prospectively enrolled 27 patients with anterior wall ST segment elevation myocardial infarction (STEMI) and 42 control subjects. In detrended fluctuation analysis (DFA), the patients had significantly lower DFAα2 in the acute stage (within 72 hours) and lower DFAα1 at 3 months and 12 months after MI. In multiscale entropy (MSE) analysis, the patients had a lower slope 5 in the acute stage, which then gradually increased during the follow-up period. The areas under the MSE curves for scale 1 to 5 (area 1-5) and 6 to 20 (area 6-20) were lower throughout the chronic stage. Area 6-20 had the greatest discriminatory power to differentiate the post-MI patients (at 1 year) from the controls. In both the net reclassification improvement and integrated discrimination improvement models, MSE parameters significantly improved the discriminatory power of the linear parameters to differentiate the post-MI patients from the controls. In conclusion, the patients with STEMI had serial changes in cardiac complexity.
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Chiu et al. (2017) conducted an observational in Anterior wall ST segment elevation myocardial infarction (STEMI) (n=69). Anterior wall STEMI vs. Control subjects (normal coronary angiography) was evaluated on Multiscale entropy area 6-20 at 12 months (p=0.001). Patients with anterior wall STEMI had lower multiscale entropy area 6-20 at 1 year compared to controls, demonstrating persistent changes in cardiac complexity.
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