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.
Claims27
A method of determining a likelihood of an occurrence of a cardiac event in a subcutaneously implanted medical device, comprising
- 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.
A 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, comprising:
- a plurality of electrodes
- a sensing module couple to the plurality of electrodes sensing a cardiac signal along a plurality of different sensing vectors formed by electrodes of the plurality of electrodes;
- and
- a processor configured to determine state information of each vector of the plurality of different sensing vectors, determine a cross correlation of the determined state information of each vector of the plurality of sensing vectors, compare the cross correlation of the determined state information of each vector of the plurality of sensing vectors to a threshold, and detect heart failure in response to the comparing.
A computer-readable medium storing a set of instructions which cause a processor of a subcutaneous implantable medical device to perform a method of determining a likelihood of an occurrence of a cardiac event, the method comprising:
- 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.
Dependencies are inferred from the claim text.