Cardiac sensing and detection using subcutaneous ECG signals and heart sounds
First Claim
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1. A medical device, comprising;
- a first plurality of electrodes sensing cardiac signals and delivering therapy;
a secondary sensor sensing the cardiac signals; and
a microprocessor detecting a cardiac event in response to the sensing by the first plurality of electrodes, wherein the microprocessor generates a first sensed signal from cardiac signals sensed by the secondary sensor concomitant to the sensing by the first plurality of electrodes, compares the first sensed signal and the concomitantly sensed cardiac signals from the first plurality of electrodes, and determines whether the first sensed signal has one of a frequency less than signals associated with the concomitant sensing by the first plurality of electrodes and a regular beat pattern relative to the concomitant sensing by the first plurality of electrodes.
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Abstract
A method and device for detecting cardiac signals that includes a first plurality of electrodes that senses cardiac signals and delivers therapy, and a second plurality of electrodes that senses the cardiac signals. A microprocessor detects a cardiac event in response to the sensing by the first plurality of electrodes, and verifies the cardiac event in response to the sensing by the second plurality of electrodes.
62 Citations
24 Claims
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1. A medical device, comprising;
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a first plurality of electrodes sensing cardiac signals and delivering therapy; a secondary sensor sensing the cardiac signals; and a microprocessor detecting a cardiac event in response to the sensing by the first plurality of electrodes, wherein the microprocessor generates a first sensed signal from cardiac signals sensed by the secondary sensor concomitant to the sensing by the first plurality of electrodes, compares the first sensed signal and the concomitantly sensed cardiac signals from the first plurality of electrodes, and determines whether the first sensed signal has one of a frequency less than signals associated with the concomitant sensing by the first plurality of electrodes and a regular beat pattern relative to the concomitant sensing by the first plurality of electrodes. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
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13. A method of detecting cardiac signals, comprising:
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sensing cardiac signals via a first plurality of electrodes to generate a sensed signal; determining whether the sensed signal corresponds to a cardiac event; sensing the cardiac signals via a second plurality of electrodes; and generating a first sensed signal from cardiac signals sensed by the second plurality of electrodes concomitant to the sensing by the first plurality of electrodes, comparing the first sensed signal and the concomitantly sensed cardiac signals from the first plurality of electrodes, and determining whether the first sensed signal has one of a frequency less than signals associated with the concomitant sensing by the first plurality of electrodes and a regular beat pattern relative to the concomitant sensing by the first plurality of electrodes. - View Dependent Claims (14, 15, 16, 17, 18, 19, 20, 21)
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22. A medical device, comprising;
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an electrode for sensing cardiac signals; an acoustic sensor for sensing heart sounds associated with the cardiac signals; and a microprocessor for comparing sensed heart sounds to cardiac signals sensed concurrently with the sensed heart sounds and determining the likelihood that one of oversensing and undersensing is occurring on the sensed cardiac signals in response to the comparing. - View Dependent Claims (23, 24)
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Specification