METHOD AND APPARATUS FOR DETECTING ARRHYTHMIAS IN A SUBCUTANEOUS MEDICAL DEVICE
First Claim
1. A method of detecting a cardiac event in a medical device, comprising:
- sensing cardiac signals from a plurality of electrodes;
determining a relationship between a plurality of characteristics associated with a morphology of the cardiac signals sensed during a predetermined sensing window;
generating a threshold in response to the determined relationship;
comparing a first characteristic of the plurality of characteristics with the threshold; and
determining whether the sensed cardiac signals are associated with the cardiac event in response to the comparing of the first characteristic.
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Abstract
A method and apparatus for detecting a cardiac event in a medical device that includes sensing cardiac signals from a plurality of electrodes, determining a relationship between a plurality of characteristics associated with a morphology of the cardiac signals sensed during a predetermined sensing window, generating a threshold in response to the determined relationship, comparing a first characteristic of the plurality of characteristics with the threshold, and determining whether the sensed cardiac signals are associated with the cardiac event in response to the comparing of the first characteristic.
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Citations
21 Claims
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1. A method of detecting a cardiac event in a medical device, comprising:
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sensing cardiac signals from a plurality of electrodes; determining a relationship between a plurality of characteristics associated with a morphology of the cardiac signals sensed during a predetermined sensing window; generating a threshold in response to the determined relationship; comparing a first characteristic of the plurality of characteristics with the threshold; and determining whether the sensed cardiac signals are associated with the cardiac event in response to the comparing of the first characteristic. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. A method of detecting a cardiac event in a medical device, comprising:
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sensing cardiac signals from a plurality of electrodes, the plurality of electrodes forming a first sensing vector and a second sensing vector different from the first sensing vector; determining a relationship between a plurality of characteristics associated with cardiac signals sensed along the first sensing vector and along the second sensing vector during a predetermined sensing window; generating a threshold in response to the determined relationship; comparing a characteristic of the plurality of characteristics with the threshold; determining whether the cardiac signals sensed along the first sensing vector are associated with the cardiac event in response to the comparing of the characteristic with the threshold for the first sensing vector; and determining whether the cardiac signals sensed along the second sensing vector are associated with the cardiac event in response to the comparing of the characteristic with the threshold for the second sensing vector. - View Dependent Claims (9, 10, 11, 12, 13, 14)
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15. A medical device, comprising:
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means for sensing cardiac signals from a plurality of electrodes; means for determining a relationship between a plurality of characteristics associated with a morphology of the cardiac signals sensed during a predetermined sensing window; means for generating a threshold in response to the determined relationship; means for comparing a first characteristic of the plurality of characteristics with the threshold; and means for determining whether the sensed cardiac signals are associated with the cardiac event in response to the comparing of the first characteristic. - View Dependent Claims (16, 17, 18, 19, 20, 21)
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Specification