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 method comprising:
- sensing, during each time period of a plurality of time periods, a first cardiac signal segment with a first sensing vector and a second cardiac signal segment with a second sensing vector;
- determining whether each of the first cardiac signal segments and the second cardiac signal segments is shockable or not shockable;
- and
- determining whether to deliver an anti-tachyarrhythmia shock to a patient based on a number of the first cardiac signal segments determined to be shockable and a number of the second cardiac signal segments determined to be shockable.
A system comprising:
- a plurality of electrodes;
- sensing circuitry coupled to the plurality of electrodes and configured to sense, during each time period of a plurality of time periods, a first cardiac signal segment with a first sensing vector and a second cardiac signal segment with a second sensing vector;
- and
- processing circuitry configured to:
- determine whether each of the first cardiac signal segments and the second cardiac signal segments is shockable or not shockable;
- and
- determine whether to deliver an anti-tachyarrhythmia shock to a patient based on a number of the first cardiac signal segments determined to be shockable and a number of the second cardiac signal segments determined to be shockable.
Dependencies are inferred from the claim text.