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

Claim 28:
29. A non-transitory computer-readable medium storing a set of instructions which, when executed by a control circuit of a medical device, cause the medical device to:
sense at least one cardiac electrical signal;
detect cardiac events from the at least one cardiac electrical signal;
detect tachyarrhythmia based on the cardiac events detected from the at least one cardiac electrical signal meeting a tachyarrhythmia criteria; and
generate a therapy in response to detecting tachyarrhythmia;
the instructions further causing the medical device to:
in response to each one of a plurality of cardiac events detected from the at least one cardiac electrical signal, determine a signal feature from a segment of the at least one cardiac electrical signal;
detect an alternating pattern of the signal feature determined from consecutive segments of the second cardiac electrical signal;
from each of at least one segment of the consecutive segments of the at least one cardiac electrical signal, determine 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;
determine that the at least one gross morphology metric does not meet the tachyarrhythmia morphology criteria;
detect cardiac event oversensing in response to the at least one gross morphology metric not meeting the tachyarrhythmia morphology criteria and detecting the alternating pattern;
withhold a tachyarrhythmia detection in response to detecting the cardiac event oversensing; and
withhold the therapy when the detection of the tachyarrhythmia is withheld.