Analysis of the high resolution ECG with the continuous wavelet transform

Ventricular late potentials (VLPs) are low-level high-frequency signals that are usually found within the terminal part of the QRS complex from patients after myocardial infarction. They are used as a diagnostic indicator of a patient prone to ventricular tachycardia, which is a major cause of death. In this study, the continuous wavelet transform was used to analyse the high resolution ECG. Then the total energy at different time intervals of the terminal region of the QRS complex was computed. In order to investigate what time interval gave the best performance for revealing VLPs to separate patients with VLPs from those without. Preliminary investigations show that some of the time intervals offered significant differences in the total energy between the two patient groups.