A comparative analysis of the new 18-lead ambulatory electrocardiography and the traditional 18-lead electrocardiography

Abstract:

Objective：To investigate the reliability and clinical value of the new 18-lead ambulatory electrocardiography（ECG）. Methods：A total of 41 subjects were enrolled and received both traditional and new 18-lead ECG. The findings of these two ECG methods were compared in terms of P-wave amplitude，shape of QRS wave，Q-wave amplitude，R-wave amplitude，S-wave ampli－tude，J-point，ST-segment shift（60 ms after J-point），and T-wave amplitude. Results：There was a good correlation between the find－ings of these two ECG methods，with the highest correlation coefficient of 0.994 in V8 lead and the lowest correlation coefficient of 0.805 in V5R（P<0.05）. There was no significant difference in Q wave between the two ECG methods（P>0.05）. According to the re－sults of the paired t-test，there were significant differences between the two ECG methods in P-wave amplitude in aVR and V2-V6 leads，R-wave amplitude in V2，V9，V3R，and V4R leads，T-wave amplitude in V3，V4，and V9 leads，and ST-segment shift in V2，V3R，and V4R leads（P<0.05）. Conclusion：The new 18-lead ECG has higher reliability than the traditional ECG，and its combination with the parameters of other leads can improve the accuracy of the diagnosis of transient myocardial ischemia and acute myocardial infarction.