Devices, systems, and methods directed to detecting positions of a catheter relative to cardiac regions of a patient are disclosed herein. In some implementations, an ablation system can include a cardiac catheter and a catheter interface unit in communication with one or more electrodes and/or sensors on the cardiac catheter. The devices, systems, and methods of the present disclosure can identify regions of the heart based on one or more signals from the respective one or more electrodes and/or sensors. In these and other implementations, the devices, system, and methods can display visual indicia based on an identified cardiac region.
