Patent Document ID: 8744555
Application ID: 12913647
Patent Flag: 1

Claim One:
1. An implantable device (ID) comprising operational circuitry and a plurality of electrodes coupled to the operational circuitry to allow observation of electrical activity by the operational circuitry when the ID is implanted in a patient, wherein the operational circuitry is configured to perform a method of detecting signals comprising: sensing electrical activity using the electrodes; detecting a detected event in the electrical activity; analyzing the detected event by defining an analysis window having an analysis window duration, identifying characteristic features of the electrical activity sensed during the analysis window, and counting the characteristic features that occur during the analysis window to generate a characteristic feature count for the detected event; and comparing the characteristic feature count to a predefined threshold and either rejecting the detected event as suspect or accepting the detected event as likely being of predetermined origin; wherein the operational circuitry is further configured to identify a change in a sensing parameter of the system and modify the predefined threshold to account for the changed sensing parameter.