Diagnostic value of fragmented QRS complex combined with pathological Q wave of electrocardiogram in acute myocardial infarction
Objective To analyze the diagnostic value of fragmented QRS complex(fQRS)combined with pathological Q wave of electrocardiogram in acute myocardial infarction(AMI).Methods A total of 100 patients with coronary heart disease admitted in our hospital from January 2020 to December 2021 were included in this study.According to the difference of electrocardiogram diagnosis results,the patients were divided into AMI group(n=52)and non-AMI group(n=48).All patients underwent electrocardiogram examination,according to whether the ST segment of electrocardiogram was elevated,52 patients with AMI were divided into ST segment elevation group and ST segment non-elevation group,and the occurrence of fQRS and pathological Q wave was compared between the two groups;with the results of pathological examination as the gold standard,the diagnostic efficacy of fQRS,pathological Q wave alone and combined detection for AMI were compared,including sensitivity,specificity,accuracy,positive predictive value and negative predictive value;according to the presence or absence of fQRS,52 patients with AMI were divided into fQRS group and non-fQRS group,and the incidence of cardiovascular adverse events and rehospitalization rate within 1 year of the two groups were followed up.Results The incidence of fQRS in the ST segment elevation group was lower than that in the ST segment non-elevation group,and the incidence of pathological Q wave was higher than that in the ST segment non-elevation group(P<0.05).The sensitivity,accuracy and negative predictive value of fQRS combined with pathological Q wave in the diagnosis of AMI were higher than those of single diagnosis(P<0.05).The incidences of cardiovascular adverse events and rehospitalization rate in the fQRS group were higher than those in the non-fQRS group(P<0.05).Conclusion fQRS combined with pathological Q wave of electrocardiogram can effectively improve the diagnostic efficacy of AMI,especially fQRS,which can evaluate the prognosis of patients and has high application value.
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