Patent ID: 11931585
Assignee: MEDTRONIC, INC.
Field: Medical technology (Instruments)
Classification: CPC A | IPC A

Claim 15:
16. A method comprising:
sensing at least one cardiac electrical signal;
detecting cardiac events from the first cardiac electrical signal;
detecting tachyarrhythmia based on the cardiac events detected from the at least one cardiac electrical signal meeting a tachyarrhythmia criteria;
generating a therapy in response to detecting tachyarrhythmia;
the method further comprising:
in response to each one of a plurality of cardiac events detected from the at least one cardiac electrical signal, determining a signal feature from a segment of the at least one cardiac electrical signal;
detecting an alternating pattern of the signal feature determined from consecutive segments of the at least one cardiac electrical signal;
from each of at least one segment of the consecutive segments of the at least one cardiac electrical signal, determining at least one gross morphology metric by determining one of:
an amplitude metric as the at least one gross morphology metric; or
a maximum signal pulse width metric as the at least one gross morphology metric;

compare the at least one gross morphology metric to tachyarrhythmia morphology criteria;
determining that the at least one gross morphology metric does not meet the tachyarrhythmia morphology criteria;
detecting cardiac event oversensing in response to the at least one gross morphology metric not meeting the tachyarrhythmia morphology criteria and detecting the alternating pattern;
withholding a tachyarrhythmia detection in response to detecting the cardiac event oversensing; and
withholding the therapy when the detection of the tachyarrhythmia is withheld.