An implantable medical device includes a detector for detecting the presence of a magnetic field, where the presence of the magnetic field is detected in response to the strength of the magnetic field exceeding a first preselected magnetic field threshold. The device further includes a processor for...http://www.google.de/patents/US20030144706?utm_source=gb-gplus-sharePatent US20030144706 - Method and apparatus for controlling an implantable medical device in response to the presence of a magnetic field and/or high frequency radiation interference signals