METHOD AND APPARATUS FOR DISCRIMINATING CARDIAC SIGNALS IN A MEDICAL DEVICE BASED ON WAVELET DECOMPOSITION ANALYSIS
First Claim
1. A method of detecting cardiac signals in a medical device, comprising:
- sensing cardiac signals to identify a predetermined cardiac event;
decomposing the sensed cardiac signals using a wavelet function to form a corresponding wavelet transform;
generating a first wavelet representation corresponding to the wavelet transform, the first wavelet representation being responsive to RR intervals of the sensed cardiac signals;
generating a second wavelet representation corresponding to the wavelet transform, the second wavelet representation not being responsive to RR intervals associated with the sensed cardiac signals;
determining a no lead failure zone in response to the first wavelet representation and the second wavelet representation; and
distinguishing the cardiac event from a device failure in response to the determined no lead failure zone.
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Accused Products
Abstract
A method and device for detecting cardiac signals in a medical device that includes decomposing sensed cardiac signals using a wavelet function to form a corresponding wavelet transform, generating a first wavelet representation corresponding to the wavelet transform that is responsive to RR intervals of the sensed cardiac signals, generating a second wavelet representation that is not responsive to RR intervals associated with the sensed cardiac signals, determining a no lead failure zone in response to the first wavelet representation and the second wavelet representation, and distinguishing the cardiac event from a device failure in response to the determined no lead failure zone. The method and device may also include generating a wavelet representation corresponding to the wavelet transform that is not responsive to RR intervals of the sensed cardiac signals, determining RR intervals associated with the sensed cardiac signals, and determining a no lead failure zone in response to the wavelet representation and the determined RR intervals.
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Citations
24 Claims
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1. A method of detecting cardiac signals in a medical device, comprising:
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sensing cardiac signals to identify a predetermined cardiac event; decomposing the sensed cardiac signals using a wavelet function to form a corresponding wavelet transform; generating a first wavelet representation corresponding to the wavelet transform, the first wavelet representation being responsive to RR intervals of the sensed cardiac signals; generating a second wavelet representation corresponding to the wavelet transform, the second wavelet representation not being responsive to RR intervals associated with the sensed cardiac signals; determining a no lead failure zone in response to the first wavelet representation and the second wavelet representation; and distinguishing the cardiac event from a device failure in response to the determined no lead failure zone. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. A method of detecting cardiac signals in a medical device, comprising:
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sensing cardiac signals; decomposing the sensed cardiac signals using a wavelet function to form a corresponding wavelet transform; generating a wavelet representation corresponding to the wavelet transform, the wavelet representation not being responsive to RR intervals of the sensed cardiac signals; determining RR intervals associated with the sensed cardiac signals; determining a no lead failure zone in response to the wavelet representation and the determined RR intervals; and distinguishing the cardiac event from a device failure in response to the determined no lead failure zone. - View Dependent Claims (9, 10, 11, 12, 22, 23, 24)
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13. A medical device, comprising:
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means for sensing cardiac signals to identify a predetermined cardiac event; means for decomposing the sensed cardiac signals using a wavelet function to form a corresponding wavelet transform; means for generating a first wavelet representation corresponding to the wavelet transform, the first wavelet representation being responsive to RR intervals of the sensed cardiac signals; means for generating a second wavelet representation corresponding to the wavelet transform, the second wavelet representation not being responsive to RR intervals associated with the sensed cardiac signals; means for determining a no lead failure zone in response to the first wavelet representation and the second wavelet representation; and means for distinguishing the cardiac event from a device failure in response to the determined no lead failure zone. - View Dependent Claims (14, 15, 16, 17, 18, 19)
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20. A medical device, comprising:
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means for sensing cardiac signals; means for decomposing the sensed cardiac signals using a wavelet function to form a corresponding wavelet transform; means for generating a wavelet representation corresponding to the wavelet transform, the wavelet representation not being responsive to RR intervals of the sensed cardiac signals; means for determining RR intervals associated with the sensed cardiac signals; means for determining a no lead failure zone in response to the wavelet representation and the determined RR intervals; and means for distinguishing the cardiac event from a device failure in response to the determined no lead failure zone. - View Dependent Claims (21)
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Specification