Mobile web-based application (WPW24.com)
Each AP region, and all QRS types in all 12 leads, separately for the full and baseline preexcitation patterns, were coded and introduced into the application database to enable automatic cross-correlation between AP localization and QRS morphology. A web-based application (WPW24.com), optimized for mobile devices was developed. The WPW24.com is a client side only progressive web app implemented with React and TypeScript. The application enabled to graphically show changing distribution of APs with regard to the introduced by the user, at each step, the QRS type in a particular ECG lead. Providing the QRS type for the subsequent ECG leads, pinpoints, in a stepwise manner, the area of maximum probability of AP localization (Figures 4 - 6 and Supplementary Video 1) . User can choose his/her own criteria/steps; there is no need to adhere to any steps or order of assessment of ECG leads. Both baseline and fully preexcited ECG can be used for map generation - per user preference. Each question regarding morphology is provided with a support – graphical illustration of several QRS types that are compatible with that QRS morphology category.