A device (10) for processing electrocardiogram signals and marker signals includes an input interface (30) for receiving electrocardiogram signals and marker signals detected by an implantable medical device; an analyzer unit (32) connected to the input interface (30) for processing the electrocardiogram signals and marker signals, and an output interface (34) connected to the analyzer unit (32) for output of data representing an analytical report to a playback unit. The analyzer unit (32) is designed to analyze electrocardiogram signals and marker signals in combination, such that the analyzer unit (32) detects relevant particular features on the basis of predefined criteria; assigns a priority to a detected particular feature; and generates an analytical report containing at least a listing of the detected particular features.