An implantable device which acquires physiological data and status information. The physiological data is compressed, reducing the memory requirement of the implantable device and/or increasing the amount of data that can be stored. The compression technique uses variable resolution while maintaining...http://www.google.de/patents/US5709216?utm_source=gb-gplus-sharePatent US5709216 - Data reduction of sensed values in an implantable medical device through the use of a variable resolution technique 
