PurposeThis study evaluates the association between habitual physical activity (HPA) and the outcomes of patients with myocardial infarction (MI).MethodsPatients newly diagnosed with MI were divided into two groups based on whether they engaged in HPA, defined as an aerobic activity with a duration of no less than 150 min/week, before the index admission. The primary outcomes included major adverse cardiovascular events (MACEs), cardiovascular (CV) mortality, and cardiac readmission rate 1 year following the index date of admission. A binary logistic regression model was applied to analyze whether HPA was independently associated with 1-year MACEs, 1-year CV mortality, and 1-year cardiac readmission rate.ResultsAmong the 1,266 patients (mean age 63.4 years, 72% male), 571 (45%) engaged in HPA, and 695 (55%) did not engage in HPA before MI. Patients who participated in HPA were independently associated with a lower Killip class upon admission (OR = 0.48: 95% CI, 0.32–0.71, p < 0.001) and a lower prevalence of 1-year MACEs (OR = 0.74: 95% CI, 0.56–0.98, p = 0.038) and 1-year CV mortality (OR = 0.50: 95% CI, 0.28–0.88, p = 0.017) than those who did not participate in HPA. HPA was not associated with cardiac-related readmission (OR = 0.87: 95% CI, 0.64–1.17, p = 0.35).ConclusionsHPA before MI was independently associated with a lower Killip class upon admission, 1-year MACEs, and 1-year CV mortality rate.
BACKGROUND Real-time three-dimensional spot tracking echocardiography (RT3D-STE) can be used to assess the prognosis of myocardial infarction (MI). Analyzing the correlation between miRNAs and RT3D-STE, especially miRNAs and Global Longitude Strain (GLS) and Global Circumferential Strain (GCS), can provide new ideas for discovering and evaluating the role of miRNAs in assessing myocardial function and prognosis of MI. METHODS The present study collected forty-nine (49) plasma samples (15 normal samples and 34 MI samples; 22 before and 12 after intervention therapy) and employed high-throughput sequencing technology and real-time quantitative polymerase chain reaction (qRT–PCR) to identify the differentially expressed miRNAs. The Pearson correlation coefficient was used to measure the strength of a linear association between differentially expressed miRNAs and strain parameters of RT3D-STE. RESULTS One hundred forty-one (141) differentially expressed plasma exosome miRNAs were identified in STEMI compared with NSTEMI. The target genes of these ten miRNAs were analyzed for Gene Ontology (GO) and Kyoto Encyclopedia of Genes and Genomes (KEGG) pathway enrichment, and they were found to be involved mainly in cellular metabolism processes, HIF-1 signaling pathway, and the FoxO signaling pathway. Moreover, three of these differentially expressed miRNAs (hsa-miR-4798-3p, hsa-miR-371a-3p and hsa-miR-4735-5p) had Pearson correlations greater than 0.5 based on GLS. CONCLUSION Differentially expressed miRNAs obtained before and after surgical therapy of MI may play important roles in the occurrence and development of MI. hsa-miR-4798-3p, hsa-miR-371a-3p, and hsa-miR-4735-5p may be used as potential prognostic indicators of MI.
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