An implantable cardiac therapy device is constructed with a housing that defines first and second chambers. The first chamber holds cardiac therapy circuitry, such as sensing and/or stimulation circuitry The second chamber holds high-frequency circuitry that transmits and receives high-frequency signals...http://www.google.com.au/patents/US20030083719?utm_source=gb-gplus-sharePatent US20030083719 - Implantable cardiac therapy device with dual chamber can to isolate high-frequency circuitry
