Patent ID: 8781567

Claim:
A method of cardiac signal analysis in an implantable cardiac device system, the implantable device system comprising a plurality of electrodes adapted for implantation in a patient, the method comprising: sensing a signal using the electrodes; and applying a dynamic heuristic filter on the sensed signal to maintain a signal baseline; wherein the dynamic heuristic filter is configured to operate by: at a predefined interval, calculating an average distance to a desired quiescent point for the sensed signal, and adjusting a sensing characteristic to reduce the average distance; in addition, analyzing the average distance and performing one of the following: if the average distance is greater than a first threshold, reducing the predetermined interval if the predetermined interval is not at a preset minimum; if the average distance is less than a second threshold, increasing the predetermined interval if the predetermined interval is not at a preset maximum; or else not adjusting the predetermined interval.