Ventricular late potential analysis with musical and harmonic wavelets

Harmonic and musical wavelets were introduced by DE Newland in 1994, and ha ve their spectrum tightly defined, therefore greatly reducing spectral leak age that may disturb signal frequency analysis. We have explored the abilit y of these wavelets to perform detection and quantification of ventricular late potentials (VLP) through our multiresolution time-scale method of ener gy comparison between the ST and TP segments of the EGG. Since reduction of spectral leakage improves the method's reliability, Newland wavelets provi ded better results than Daubechies wavelets in our study cases. The only dr awback is the comparatively reduced time resolution of Newland wavelets. Th is required us to concatenate a number of ST segments to form a longer data set that is more representative of the high-resolution ECG (HR-ECG) of a p atient than one individual beat. This approach may also be considered for o ther applications in the HR-ECG held. The spectral properties of the Newlan d wavelets play a major role in the improvement in our results. (C) 1999 IP EM. Published by Elsevier Science Ltd. All rights reserved.