Clinical value of 12-lead dynamic electrocardiogram combined with CT angiography in the diagnosis of asymptomatic myocardial ischemia
Objective To analyze the diagnostic value of 12-lead dynamic electrocardiogram combined with CT angiography in asymptomatic myocardial ischemia.Methods A total of 88 patients with suspected asymptomatic myocardial ischemia diagnosed and treated in our hospital from June 2020 to May 2022 were included as the study objects.All patients underwent 12-lead dynamic electrocardiogram,CT angiography and coronary angiography examination.The results of 12-lead dynamic electrocardiogram and CT angiography were compared between the positive and negative groups of coronary angiography;with diagnostic results of coronary angiography as the"gold standard",the diagnostic value of 12-lead dynamic electrocardiogram,CT angiography alone and combined examination for asymptomatic myocardial ischemia was compared;the consistency of 12-lead dynamic electrocardiogram,CT angiography alone and combined examination with coronary angiography were analyzed.Results A total of 58 cases were positive and 30 cases were negative detected by coronary angiography;the QT interval and QTc interval in the positive group were significantly longer than those in the negative group(P<0.05).The number of plaques,total plaque volume,total plaque load,degree of vascular stenosis and reconstruction index in the positive group were higher than those in the negative group(P<0.05).The accuracy of combined examination of 12-lead dynamic electrocardiogram and CT angiography in the diagnosis of asymptomatic myocardial ischemia was higher than that of single examination(P<0.05).The combined examination of 12-lead dynamic electrocardiogram and CT angiography had good consistency with coronary angiography(Kappa=0.806).Conclusion 12-lead dynamic electrocardiogram combined with CT angiography has a good effect in the diagnosis of asymptomatic myocardial ischemia,and has important application value.
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