AIM   AIM To evaluate the value of dynamic electrocardiogram and BNP in the diagnosis of asymptomatic myocardial ischemia in patients with coronary heart disease.

  METHODS   Between June 2014 to May 2017, 69 patients with coronary heart disease were enrolled in this study. All patients underwent routine electrocardiogram, ambulatory electrocardiogram, and plasma brain natriuretic peptide (BNP) measurement. The diagnosis of asymptomatic myocardial ischemia was compared between different diagnostic methods and the ST segment displacement of patients with coronary heart disease complicated with asymptomatic myocardial ischemia and symptomatic myocardial ischemia were compared.

  RESULS   Sensitivity, specificity, and accuracy of DCG were higher than those of BNP, and the accuracy of DCG was higher than that of ECG, P<0.05, with statistical differences. The diagnostic sensitivity of dynamic electrocardiogram combined with BNP detection was higher than other diagnostic schemes, specificity was lower than that of DCG diagnosis, and accuracy was higher than ECG and BNP diagnosis (P<0.05,P<0.01), with statistical differences. The results revealed that ST segment displacement in patients with symptomatic myocardial ischemia was significantly higher than that in patients with symptomatic myocardial ischemia (P<0.05). There were significant differences.

  CONCLUSION   Dynamic electrocardiogram is more sensitive to the diagnosis of coronary heart disease with asymptomatic myocardial ischemia. It can be used to distinguish patients with symptomatic and asymptomatic myocardial ischemia. BNP can also be used as coronary heart disease with asymptomatic myocardial ischemia screening of biochemical indicators, assisted dynamic electrocardiogram diagnosis.