Patent ID: 8073537

Claim:
A method of determining oversensing during post-processing of sensing data generated by and stored within an implantable medical device, comprising: receiving the sensing data generated by the implantable medical device with an external access device, wherein the sensing data includes sensed atrial events and sensed ventricular events; determining, with the external access device, in response to the received data, instances where the implantable medical device identified a cardiac event being detected in response to the sensing data; identifying, with the external access device, a set of suspected far-field R-waves in the sensing data; removing, with the external access device, the set of suspected far-field R-waves from the sensing data; and determining, with the external access device, whether the sensed atrial events of the sensing data, with the set of suspected far-field R-waves removed, occur at regular intervals, wherein determining whether the sensed atrial events occur at regular intervals comprises determining whether a predetermined number of the intervals, starting with and working backward in time from one of the intervals corresponding to detection of the cardiac event by the implantable medical device, have approximately equal cycle lengths.