Method and apparatus for detecting arrhythmias in a subcutaneous medical device
AssigneeMedtronic, Inc.
InventorsRobert W. Stadler, Raja N. Ghanem, Xusheng Zhang
Life of this patent
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Abstract
A method and system for use with an implantable medical device for subcutaneous implant within a patient to determine a likelihood of the patient experiencing a cardiac event that includes sensing a cardiac signal along a plurality of different sensing vectors, determining state information of each vector of the plurality of sensing vectors, determining a cross correlation of the determined state information of each vector of the plurality of sensing vectors, comparing the cross correlation of the determined state information of each vector of the plurality of sensing vectors to a threshold, and detecting the cardiac event in response to the comparing.
Claims20
A medical device comprising:
- a sense amplifier configured to sense, during each time period of a plurality of time periods, a respective cardiac signal segment with a sensing vector;
- processing circuitry configured to:
- for each of the cardiac signal segments, classify the cardiac signal segment as shockable or not shockable based on a morphology of the cardiac signal segment;
- determine a number of the cardiac signal segments classified as shockable;
- and
- determine to deliver an anti-tachyarrhythmia shock based at least on the number of the cardiac signal segments classified as shockable;
- and
- therapy delivery circuitry configured to deliver the anti-tachyarrhythmia shock in response to the determination to deliver the anti-tachyarrhythmia shock.
A medical device system comprising:
- a medical device comprising a sense amplifier configured to sense, during each time period of a plurality of time periods, a respective cardiac signal segment with a sensing vector;
- and
- processing circuitry configured to:
- for each of the cardiac signal segments, classify the cardiac signal segment as shockable or not shockable based on a morphology of the cardiac signal segment;
- determine a number of the cardiac signal segments classified as shockable;
- and
- determine to deliver an anti-tachyarrhythmia shock based at least on the number of the cardiac signal segments classified as shockable,
- wherein the medical device further comprises therapy delivery circuitry configured to deliver the anti-tachyarrhythmia shock in response to the determination to deliver the anti-tachyarrhythmia shock.
A method comprising:
- sensing, during each time period of a plurality of time periods, a respective cardiac signal segment with a sensing vector;
- for each of the cardiac signal segments, classifying the cardiac signal segment as shockable or not shockable based on a morphology of the cardiac signal segment;
- determining a number of the cardiac signal segments classified as shockable;
- determining to deliver an anti-tachyarrhythmia shock based at least on the number of the cardiac signal segments classified as shockable;
- and
- delivering the anti-tachyarrhythmia shock in response to the determination to deliver the anti-tachyarrhythmia shock.
Dependencies are inferred from the claim text.