Abstract:OBJECTIVE To investigate the clinical value of resting electrocardiogram in the differential diagnosis of coronary heart disease (CHD) patients. METHODS A total of 247 patients with CHD were enrolled in this study. all subjects were treated with resting electrocardiogram and coronary angiography. The results of coronary angiography were used as diagnostic gold standard , Respectively, to calculate the number of different coronary artery lesions, different coronary artery stenosis in patients with CHD using resting electrocardiogram diagnosis of clinical value. RESULTS 247 patients with high suspicion, coronary angiography confirmed 187 patients with CHD and 60 patients with non-CHD. According to Table 1, the sensitivity of CHD was 72.19%, the specificity was 56.67%, the missed rate was 27.81% Misdiagnosis rate was 43.33%, positive predictive value was 83.85%, negative predictive value was 39.53%; electrocardiogram diagnosis CHD single disease patients with sensitivity of 51.92%, specificity of 56.67%; electrocardiogram diagnosis of CHD patients with double sensitivity of 74.07 %, The specificity of 56.67% ECG diagnosis of CHD three patients with a sensitivity of 87.04%, specificity of 56.67%; ECG diagnosis of CHD mild stenosis patients with a sensitivity of 42.65%, specificity of 56.67%; ECG diagnosis of moderate CHD The sensitivity of the patients was 74.03% and the specificity was 56.67%. The sensitivity of the electrocardiogram was 90.48% and the specificity was 56.67%. CONCLUSION Resting electrocardiogram has a certain clinical value in the diagnosis of CHD, especially for patients with multiple lesions, severe stenosis of patients with a higher diagnostic sensitivity.