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

摘要

In general, the disclosure is directed to techniques for identification and remediation of oversensed cardiac events using far-field electrograms (FFEGMs). Identification of oversensed cardiac events can be used in an ICD to prevent ventricular fibrillation (VF) detection, and thereby avoid delivery of an unnecessary defibrillation shock. Alternatively, or additionally, identification of oversensed cardiac events can be used in an ICD to support delivery of bradycardia pacing during an oversensing condition. In some cases, bradycardia pacing delivered in response to detection of oversensed cardiac events may include pacing pulses from multiple vectors to provide redundancy in the event the oversensing may be due to a lead-related condition.

主权项

1. A method comprising:
acquiring a first cardiac signal via a first sense electrode configuration; acquiring a second cardiac signal via a second sense electrode configuration; detecting a plurality of cardiac events in the first cardiac signal; measuring a plurality of intervals between the cardiac events detected in the first cardiac signal; analyzing one or more characteristics of the second cardiac signal to determine whether at least one of the plurality of cardiac events detected in the first cardiac signal comprises an oversensed event; identifying at least one oversensed event of the plurality of cardiac events in the first cardiac signal based on the analysis of the one or more characteristics of the second cardiac signal; and controlling delivery of a cardiac electrical stimulation therapy to a patient based on the identification of at least one oversensed event by:
withholding a first interval of the plurality of intervals from a therapy delivery control module in response to identifying the at least one oversensed event causing the first interval to have been measured;obtaining a summed interval by summing the first interval with one or more next intervals of the plurality of intervals until a last of the next intervals that is not between oversensed events; andproviding the summed interval to the therapy delivery control module for use in controlling delivery of the cardiac electrical stimulation therapy.