Laboratory Medicine ›› 2022, Vol. 37 ›› Issue (12): 1164-1168.DOI: 10.3969/j.issn.1673-8640.2022.12.012

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Predictive values of red blood cell distribution width and myocardial markers for acute myocardial infarction in patients with CAS

MA Jianguo1, ZHU Xiaolin1, DING Yongguang2, YIN Meng1, LI Hongchun3()   

  1. 1. Department of Clinical Laboratory,Zhongxing Hospital of Shuyang,Suqian 223600,Jiangsu,China
    2. Department of Cardiology,Zhongxing Hospital of Shuyang,Suqian 223600,Jiangsu,China
    3. School of Medical Technology,Xuzhou Medical University,Xuzhou 221000,China
  • Received:2022-03-18 Revised:2022-09-19 Online:2022-12-30 Published:2023-02-02
  • Contact: LI Hongchun,E-mail:56834997@qq.com。

Abstract:

Objective To investigate the predictive values of red blood cell distribution width(RDW) for acute myocardial infarction(AMI) in patients with coronary atherosclerosis(CAS). Methods Totally,600 patients with CAS were enrolled. The clinical data of all the patients were collected,and RDW,cardiac troponin I(cTnI),creatine kinase MB isoenzyme(CK-MB) and lipid levels were determined. All the patients were followed up for 5 years,and the end points were AMI,death or the completion of follow-up. Receiver operating characteristic(ROC) curve was used to evaluate the value of each indicator in determining the occurrence of AMI in CAS patients. Kaplan-Meier survival curve analysis was used to analyze the differences in the occurrence of AMI among all the groups,and Cox regression analysis was used to evaluate the risk factors of AMI in CAS patients. Results Follow-up was completed in 450 of 600 CAS patients,32 of whom developed AMI. The areas under curves(AUC) of RDW,CK-MB and cTnI single and combined determination for AMI in CAS patients were 0.747,0.722,0.714 and 0.774,respectively. All the CAS patients were classified into RDW≥13.8% and RDW<13.8% according to the optimal cut-off value of RDW obtained by ROC curve. The age,CK-MB,cTnI and the occurrence of AMI in RDW≥13.8% group were higher than those in RDW<13.8% group(P<0.001). There was no statistical significance in the other clinical data and blood lipids between the 2 groups(P>0.05). Kaplan-Meier survival curve analysis results showed that the occurrence of AMI in RDW≥13.8% group was higher than that in RDW<13.8% group(P<0.001). Multivariate Cox regression analysis showed that elevated RDW was an independent risk factor for AMI in CAS patients after adjusting for age,sex,body mass index,smoking history,alcohol consumption history and diabetes mellitus history [hazard ratio(HR)=1.727,95% confidence interval(CI) 1.492-1.998]. Conclusions RDW has clinical value in predicting the occurrence of AMI in patients with CAS,and the combination of CK-MB and cTnI may improve the predictive efficiency of the occurrence of AMI in patients with CAS.

Key words: Red blood cell distribution width, Cardiac troponin I, Creatine kinase MB isoenzyme, Coronary atherosclerosis, Acute myocardial infarction

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