Patent ID: 8792971

Claim:
An implantable medical system comprising: at least one implantable lead that includes a plurality of electrodes; an implantable medical device coupled to the at least one implantable lead, the implantable medical device including: a memory configured to store a near-field electrogram signal and a far-field electrogam signal; and a microprocessor configured to obtain the near-field electrogram signal, analyze the near-field electrogram signal to detect sense events in the near-field electrogram signal, obtain the far-field electrogram signal, analyze the far-field electrogram signal to detect sense events in the far-field electrogram signal, map each detected sense event in the far-field electrogram signal to a corresponding detected sense event in the near-field electrogram signal, determine that oversensing exists when a first predetermined number of detected sense events in the near-field electrogram signal that are not mapped to corresponding detected sense events in the far-field electrogram signal occur within a second predetermined number of detected sense events in the near-field electrogram signal that are mapped to corresponding detected sense events in the far-field electrogram signal.