Figure 1. Categorization of accessory pathway (AP) regions/types. This is the baseline probability map of AP localization that is the starting point of ECG interpretation - before any QRS morphology data is considered by the WPW24.com application. The percentages correspond to the distribution of all AP in the full preexcitation cohort - hence the fasciculo-ventricular pathways, not capable to fully preexcite the ventricles, are not counted here. For explanation of the abbreviations and the definitions of AP types/regions see text.