A telemetry system for radio-frequency communications between an implantable medical device and an external device providing improved noise immunity is disclosed. Multiple communications channels are used to enable establishment and re-establishment of communications between a particular pair of devices...http://www.google.ca/patents/US20070185550?utm_source=gb-gplus-sharePatent US20070185550 - DYNAMIC CHANNEL SELECTION FOR RF TELEMETRY WITH IMPLANTABLE DEVICE
