To investigate the diagnosis value of combined application of conventional electrocardiogram and dynamic electrocardiogram in children with viral myocarditis.

Total of 125 cases with viral myocarditis in our hospital from June 2012 to June 2015 were selected. All of the children were detected with myocardial enzymes, cardiac troponin and other indicators, also conventional ECG detection combined with three channels of the dynamic electrocardiogram analysis system were applied, wearing continuously for 24 h.

The clinical manifestations of viral myocarditis were complicated and varied, among which, 52 cases (41.6%) presented first cardiovascular symptoms, 22 cases (17.6%) with digestive tract symptoms, 36 cases (28.8%) with respiratory symptoms. There were 147 kinds of (among 98 cases) arrhythmia were detected by routine ECG, 199 kinds (among 110 patients) were detected by dynamic electrocardiogram examination, 207 kinds (among 121 cases) of arrhythmia. The cases detceted by conventional ECG or dynamic ECG were all significantly less than those of conventional ECG combined with dynamic ECG (χ²= 3.146, P = 0.039). The positive rates of viral myocarditis in the patients were 63.2%, 78.4%, 88% and 96.8%, respectively, detected by myocardial enzymes and myocardial troponin conventional, ECG, dynamic ECG, conventional ECG and combined with dynamic ECG detection. The positive rates detected by combined ECG and dynamic ECG was significantly higher than those of other methods, with significant difference (χ²= 4.081, P = 0.023). The top five of arrhythmia symptoms in the 125 patients were real beats, room of beats, ST segment change, first-degree atrioventricular block and QRS low voltage.

Conventional ECG is a commonly used detection method, the combination with dynamic ECG could improve the diagnosis rate of arrhythmia, with positive guidance for the treatment and prognosis of patients.