The capability of accessing, analyzing and possibly updating patients' medical records from anywhere through a mobile device in the hands of clinicians and nurses is considered to be a particularly promising application. Information Visualization has explored interactive visual formats to help users in analyzing patient records, but they are meant for the desktop context. This paper begins to explore the problem of visualizing patient record data with the limited display and interaction capabilities of mobile devices, focusing on common PDAs and temporal data. Categories and Subject Descriptors H.5.2 [Information interfaces and presentation]: User Interfaces