MOUNTAIN VIEW, CA--(Marketwire - October 09, 2007) - Making a powerful tool more widely available for use during cardiac arrhythmia treatment, Hansen Medical, Inc. (NASDAQ: HNSN) announced it has installed a total of five Sensei™ Robotic Catheter systems in the United States and four in Europe since receiving both FDA and CE Mark clearance in May 2007. The installation sites range from large teaching institutions and university medical centers to community hospitals, and, as a result, those patients now have access to a more sophisticated level of cardiac arrhythmia treatment within their communities.