IMAGING SCIENCE AND PHOTOCHEMISTRY ›› 2022, Vol. 40 ›› Issue (5): 1083-1087.DOI: 10.7517/issn.1674-0475.220321

• Review and Articles • Previous Articles     Next Articles

Application of Echocardiography Combined with Serum miR-26b-5p in the Diagnosis of Acute Myocardial Infarction

QIN Jizhou1, JIN Yan2, LUO Zhaojun1   

  1. 1. Department of Cardiology, Second Province People's Hospital of Gansu, Lanzhou 730000, Gansu, P. R. China;
    2. Department of Facial Features, Second Province People's Hospital of Gansu, Lanzhou 730000, Gansu, P. R. China
  • Received:2022-03-10 Published:2022-09-13

Abstract: This paper discussed the diagnostic value of echocardiography combined with serum microRNA-26b-5p (miR-26b-5p) in acute myocardial infarction (AMI). 115 patients with AMI (observation group) and 80 patients with old myocardial infarction were selected as the control group, the echocardiographic parameters and serum miR-26b-5p of the two groups were analyzed. The left ventricular end diastolic diameter (LVEDd), left ventricular end systolic diameter (LVEDs), left ventricular end diastolic volume (LVEDV), left ventricular end systolic volume (LVESV) and myocardial work index (Tei) in the observation group were higher than those in the control group (P<0.05), while the left ventricular ejection fraction (LVEF), E/A and miR-26b-5p were significantly lower than those in the control group (P<0.05). There were significant differences in LVEF and serum miR-26b-5p levels in patients with different degrees of coronary stenosis (P<0.05). The serum miR-26b-5p was negatively correlated with Gensini score (r=-0.503, P<0.05). The sensitivity and negative predictive value of echocardiography combined with serum miR-26b-5p in the diagnosis of AMI were significantly higher than that of echocardiography alone (P<0.05). Follow-up results showed that LVEDs and LVESV in patients with major adverse cardiovascular events (MACE) were significantly higher than those without MACE (P<0.05), and LVEF and miR-26b-5p were significantly lower than those without MACE (P<0.05). The areas under the ROC curve of LVEDs, LVEF, miR-26b-5p and combined prediction of MACE were 0.753, 0.732, 0.701 and 0.915, respectively, P<0.05. The serum level of miR-26b-5p is decreased in patients with acute myocardial infarction, miR-26b-5p combined with echocardiographic parameters has a good application value in differential diagnosis of AMI and prediction of MACE.

Key words: echocardiography, microRNA-26b-5p (miR-26b-5p), acute myocardial infarction, prognosis, diagnostic value