Patent ID: 8774909

Claim:
A method comprising: receiving stored episode data generated by an implantable medical device, the stored episode data including sensed atrial events and sensed ventricular events for both a near-field channel and a far-field channel; determining, in response to the received data, instances where the implantable medical device identified a cardiac episode being detected in response to the episode data for at least one of the near-field channel and the far-field channel; evaluating, in response to the received data, whether the determined instances should have been identified by the implantable medical device as a cardiac episode being detected, the evaluation including: classifying the cardiac episode as unknown, supraventricular tachycardia, ventricular tachycardia/ventricular fibrillation, or ventricular over-sensing based on episode data for the near-field channel; classifying the cardiac episode as unknown, supraventricular tachycardia ventricular tachycardia/ventricular fibrillation, or ventricular over-sensing based on episode data for the far-field channel; comparing the classifications from the near-field channel and the far-field channel to determine a final classification, wherein, when at least one of the classifications is ventricular over-sensing, determining the final classification comprises determining that the final classification is ventricular over-sensing, wherein, when the classifications of both the near-field channel and the far-field channel are unknown, determining the final classification comprises determining that the final classification is unknown, wherein, when the classification of the far-field channel is a known result, determining the final classification comprises determining that the final classification is the classification of the far-field channel, and wherein, when the classification of the near-field channel is a known result and the classification of the far-field channel is unknown, determining the final classification comprises determining that the final classification is the classification of the near-field channel.