| abstract |
Cardiac activity (eg, an electrocardiogram) is analyzed for local abnormal ventricular activity (LAVA), such as by using a LAVA detection and analysis module incorporated into an electrophysiological mapping system. The module converts the electrogram signal into a wavelet domain for calculation as a scalogram, calculates a one-dimensional LAVA function of the scalogram, detects one or more peaks in the LAVA function, and between the peaks of the electrogram signal Calculate the amplitude. If the peak-to-peak amplitude does not exceed a preset amplitude threshold, the module uses the LAVA delay parameter for the electrogram signal using one of the one or more peaks detected in the LAVA function, and the potential One or more of the LAVA probability parameters for the graphical signal can be calculated. |