Design and validation of a pacing-spike removal algorithm for paced frequency domain analysis

However, it is uncertain whether ST-T changes can be accurately evaluated by the portable ECG devices. The aim of this study was to examine the accuracy of evaluation of ST-T changes, as compared with the standard 12-lead ECG. Methods: Seventy-one patients who have indicated any ST-T changes by the standard 12-lead ECG were examined. We recorded ECG by Omron's monitoring device (HCG-801) at each equivalent location of V1 to V6 for 30 seconds. We compared the ECG recorded by HCG-801 with almost simultaneously recorded 12-lead ECG. Results: HCG-801 recorded ECG clear enough for physicians to diagnose in all patients. The concordance rate of ST-T changes between 12-lead ECG and HCG-801 was approximately 56%, if V4 lead was selected for the detection of ST-T changes. However, the concordance rate has improved up to 82%, if V5 lead was selected for the detection of ST-T changes. Conclusions: Most of the ST-T changes detected by 12-lead ECG can be accurately evaluated by HCG-801, if the V5 lead was selected for the detection of ST-T changes. Our results suggest that the evaluation of ST-T changes by compact portable ECG monitors could be reliable, even if a single lead were used.