Identification and remediation of oversensed cardiac events using far-field electrograms

An implantable medical device comprising:

• an electrical sensing module configured to acquire first cardiac signal via a first sense electrode configuration, and acquire a second cardiac signal via a second sense electrode configuration;
• a stimulation module configured to deliver cardiac electrical stimulation therapy to a patient via stimulation electrodes;
• and
• a processor configured to detect cardiac events in the first cardiac signal, identify at least some of the cardiac events detected in the first cardiac signal as oversensed events based on whether one or more characteristics of the second cardiac signal confirm the cardiac events, determine time intervals between the detected cardiac events, determine repaired time intervals, each of the repaired time intervals being determined based on a sum of time intervals between a first detected cardiac event not identified as an oversensed event, one or more detected cardiac events identified as oversensed events, and a second detected cardiac event not identified as an oversensed event, and control the stimulation module to deliver the cardiac electrical stimulation therapy to the patient based on the repaired time intervals.

An implantable medical device comprising:

• means for acquiring a first cardiac signal via a first sense electrode configuration;
• means for acquiring a second cardiac signal via a second sense electrode configuration;
• means for detecting cardiac events in the first cardiac signal;
• means for identifying at least some of the cardiac events detected in the first cardiac signal as oversensed events based on whether one or more characteristics of the second cardiac signal confirm the cardiac events;
• means for determining time intervals between the detected cardiac events;
• means for determining repaired time intervals, each of the repaired time intervals being determined based on a sum of time intervals between a first detected cardiac event not identified as an oversensed event, one or more detected cardiac events identified as oversensed events, and a second detected cardiac event not identified as an oversensed event;
• and
• means for controlling delivery of cardiac electrical stimulation therapy to a patient based on the repaired time intervals.

A non-transitory computer-readable storage medium comprising instructions that, when executed by a processor in an implantable medical device, cause the processor to:

• detect cardiac events in a first cardiac signal acquired via a first sense electrode configuration;
• identify at least some of the cardiac events detected in the first cardiac signal as oversensed events based on whether one or more characteristics of a second cardiac signal acquired via a second sense electrode configuration confirm the cardiac events;
• determine time intervals between the detected cardiac events;
• determine repaired time intervals, each of the repaired time intervals being determined based on a sum of time intervals between a first detected cardiac event not identified as an oversensed event, one or more detected cardiac events identified as oversensed events, and a second detected cardiac event not identified as an oversensed event;
• and
• control a stimulation module to deliver of cardiac electrical stimulation therapy to a patient based on the repaired time intervals.