Patent ID: 8265749

Claim:
A method of cardiac signal analysis in an implantable medical device (IMD) the IMD including a number of implantable electrodes and operational circuitry coupled to the implantable electrodes for performing the method of cardiac signal analysis, the method comprising: a) the operational circuitry detecting events in a signal captured using the implantable electrodes; b) the operational circuitry determining which detected events to certify for use in rhythm identification by: i) applying analysis of the morphology of a set of detected events in order to identify overdetected events such that, if a likely overdetection is identified, the likely overdetection is not certified; ii) applying interval analysis on a set of detected events in order to identify overdetected events such that, if a likely overdetection is identified, the likely overdetection is not certified; and iii) certifying at least some detected events of the set of detected events; c) the operational circuitry determining whether a malignant cardiac rhythm is occurring using only certified detected events wherein each certified detected event has undergone analysis of at least b)i) and b)ii) before use to determine whether a malignant cardiac rhythm is occurring; and d) the IMD delivering therapy in response to the malignant rhythm.