Method and apparatus for detecting cardiac event oversensing
AssigneeMedtronic, Inc.
InventorsGavin M. Mischler, Yuanzhen Liu, Saul E. Greenhut, Xusheng Zhang
Life of this patent
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Abstract
A medical device is configured to detect an alternating pattern of signal features determined from consecutive segments of a cardiac electrical signal and determine a gross morphology metric from at least one segment of the cardiac electrical signal. The device is configured to detect cardiac event oversensing in response to detecting the alternating pattern and the gross morphology metric not meeting tachyarrhythmia morphology criteria. The medical device may withhold detecting an arrhythmia in response to detecting the cardiac event oversensing.
Claims21
A medical device comprising:
- a cardiac electrical signal sensing circuit configured to sense a plurality of cardiac electrical signals;
- a control circuit configured to:
- determine signal features from the plurality of cardiac electrical signals;
- detect an alternating pattern of the signal features;
- identify, based on the alternating pattern of the signal features, at least one segment of the plurality of cardiac electrical signals that is a suspected R-wave;
- from the at least one segment identified as a suspected R-wave, determine at least one of:
- a maximum signal pulse width;
- or
- an amplitude metric;
- based on at least one of the maximum signal pulse width or the amplitude metric, determine that the suspected R-wave is one of:
- a tachyarrhythmia morphology;
- or
- a true sensed R-wave;
- detect a tachyarrhythmia in response to at least determining the suspected R-wave is the tachyarrhythmia morphology;
- and
- withhold detecting the tachyarrhythmia in response to at least determining that the suspected R-wave is the true sensed R-wave;
- and
- a therapy delivery circuit configured to deliver a tachyarrhythmia therapy in response to the control circuit detecting the tachyarrhythmia.
A method comprising:
- sensing a plurality of cardiac electrical signals;
- determining signal features from the plurality of cardiac electrical signals;
- detecting an alternating pattern of the signal features;
- identifying, based on the alternating pattern of the signal features, at least one segment of the plurality of cardiac electrical signals that is a suspected R-wave;
- from the at least one segment identified as a suspected R-wave, determining at least one of:
- a maximum signal pulse width;
- or
- an amplitude metric;
- based on at least one of the maximum signal pulse width or the amplitude metric, determining that the suspected R-wave is one of:
- a tachyarrhythmia morphology;
- or
- a true sensed R-wave;
- detecting a tachyarrhythmia in response to at least determining the suspected R-wave is the tachyarrhythmia morphology;
- withholding detecting the tachyarrhythmia in response to at least determining that the suspected R-wave is the true sensed R-wave;
- and
- delivering a tachyarrhythmia therapy in response to detecting the tachyarrhythmia.
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 a plurality of cardiac electrical signals;
- determine signal features from the plurality of cardiac electrical signals;
- detect an alternating pattern of the signal features;
- identify, based on the alternating pattern of the signal features, at least one segment of the plurality of cardiac electrical signals that is a suspected R-wave;
- from the at least one segment identified as a suspected R-wave, determine at least one of:
- a maximum signal pulse width;
- or
- an amplitude metric;
- based on at least one of the maximum signal pulse width or the amplitude metric, determine that the suspected R-wave is one of:
- a tachyarrhythmia morphology;
- or
- a true sensed R-wave;
- detect a tachyarrhythmia in response to at least determining the suspected R-wave is the tachyarrhythmia morphology;
- withhold detecting the tachyarrhythmia in response to at least determining that the suspected R-wave is the true sense R-wave;
- and
- deliver a tachyarrhythmia therapy in response to detecting the tachyarrhythmia.
Dependencies are inferred from the claim text.