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Overcoming information overload is a major challenge in current healthcare practice. Interactive Information Visualization methods are promising tools for physicians to ease this situation. We present our VisuExplore prototype, an interactive Information Visualization application for exploring patient data. Its user-centered design and development process involves physicians to match their requirements and needs. The VisuExplore prototype visualizes a flexible selection of medical parameters over time. It provides a range of interaction techniques, and is designed to be easy to use as well as unambiguous to interpret.