Abstract: One embodiment includes a medical system including electrodes configured for application to a body of a subject and configured to output signals in response to electrical activity of a heart of the subject, a display, and a processor configured to store a set of templates corresponding to different types of arrhythmia of the heart, apply the templates to the signals so as to associate one or more different temporal sections of the signals with respective ones of the types of arrhythmia, and render to the display a user interface screen including at least a part of the signals and graphical identifiers identifying the different temporal sections of at least the part of the signals with the respective ones of the types of arrhythmia with which they are associated.