Interventions within the heart require maximum concentration by the surgeon and complete reliability of the tools. At the best possible rate, the radiofrequency ablation system HAT500 for cardiac interventions supports the operating team: the radiofrequency generator and the pump for irrigated ablation catheters is centrally and clearly controlled via a remote control with a high resolution touch screen. Latest insights combined with practical requirements are considered by developing together with universities and expert users. For instance, handling the touch screen is possible with and without gloves, all functions are neatly arranged to get the most important parameters at a glance. The hybrid interface uses a rotating wheel for a maximum positioning speed and a favored haptic feedback exactly where it is needed. Finally, a clearly structured coloring prevents errors and saves time: the connector jacks and the cables to connect are tinted equally. The colors of the different parameters are repeated within the graphs. To put the focus on the main features, the industrial design with its valuable glass and metal surfaces wittingly stays in the background for the rest.