Method and apparatus for selecting a sensing vector configuration in a medical device
First Claim
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1. A medical device for determining sensing vectors, comprising:
- a plurality of electrodes configured to sense cardiac electrogram signals of a patient, wherein the plurality of electrodes are configured to form a plurality of sensing vectors, each of the plurality of sensing vectors for sensing a respective one of the cardiac electrogram signals; and
a processor configured to;
set a detection window in each of the plurality of sensing vectors for each of a plurality of cardiac cycles;
determine, for each of the detection windows, one or more signal differences between a sensing threshold and an amplitude of a portion of the respective sensed cardiac electrogram signal occurring within the detection window;
rank each of the sensing vectors of the plurality of sensing vectors relative to each other based on a vector selection metric determined based on the signal differences; and
select one or more sensing vectors of the plurality of sensing vectors based on the determined rankings; and
therapeutic signal generation circuitry configured to deliver a therapeutic signal to the patient;
wherein the processor is further configured to;
sense, via the selected one or more sensing vectors, one or more cardiac electrogram signals indicative of cardiac arrythmia in the patient; and
in response to sensing the one or more cardiac electrogram signals indicative of cardiac arrythmia in the patient, control the therapeutic signal generation circuitry to deliver the therapy signal to the patient.
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Abstract
A method and medical device for determining sensing vectors that includes sensing cardiac signals from a plurality of electrodes, the plurality of electrodes forming a plurality of sensing vectors, determining signal differences during a detection window in each of the plurality of sensing vectors, ranking sensing vectors of the plurality of sensing vectors in response to the determined signal differences, and selecting one or more sensing vectors of the plurality of sensing vectors in response to the determined rankings.
224 Citations
22 Claims
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1. A medical device for determining sensing vectors, comprising:
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a plurality of electrodes configured to sense cardiac electrogram signals of a patient, wherein the plurality of electrodes are configured to form a plurality of sensing vectors, each of the plurality of sensing vectors for sensing a respective one of the cardiac electrogram signals; and a processor configured to; set a detection window in each of the plurality of sensing vectors for each of a plurality of cardiac cycles; determine, for each of the detection windows, one or more signal differences between a sensing threshold and an amplitude of a portion of the respective sensed cardiac electrogram signal occurring within the detection window; rank each of the sensing vectors of the plurality of sensing vectors relative to each other based on a vector selection metric determined based on the signal differences; and select one or more sensing vectors of the plurality of sensing vectors based on the determined rankings; and therapeutic signal generation circuitry configured to deliver a therapeutic signal to the patient; wherein the processor is further configured to; sense, via the selected one or more sensing vectors, one or more cardiac electrogram signals indicative of cardiac arrythmia in the patient; and in response to sensing the one or more cardiac electrogram signals indicative of cardiac arrythmia in the patient, control the therapeutic signal generation circuitry to deliver the therapy signal to the patient. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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12. A method of determining sensing vectors in a medical device, comprising:
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sensing, by a medical device, cardiac electrogram signals of a patient from a plurality of electrodes, wherein the plurality of electrodes are configured to form a plurality of sensing vectors, each of the plurality of sensing vectors for sensing a respective one of the cardiac electrogram signals; for each of a plurality of cardiac cycles, setting, by a processor, a detection window in each of the plurality of sensing vectors; determining, by the processor and for each of the detection windows, one or more signal differences between a sensing threshold and an amplitude of a portion of the respective sensed cardiac electrogram signal occurring within the detection window; ranking, by the processor, each of the sensing vectors of the plurality of sensing vectors relative to each other based on a vector selection metric determined based on the signal differences; selecting, by the processor, one or more sensing vectors of the plurality of sensing vectors based on the determined rankings; sensing, by the processor and via the selected one or more sensing vectors, one or more cardiac electrogram signals indicative of cardiac arrythmia in the patient; and in response to sensing the one or more cardiac electrogram signals indicative of cardiac arrythmia in the patient, controlling, by the processor, a therapeutic signal generation circuitry of the medical device to deliver a therapeutic signal to the patient. - View Dependent Claims (13, 14, 15, 16, 17, 18, 19, 20, 21)
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22. A non-transitory, computer-readable storage medium storing instructions for causing a processor included in a medical device to perform a method for determining sensing vectors, the method comprising:
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sensing cardiac electrogram signals from a plurality of electrodes, wherein the plurality of electrodes are configured to form a plurality of sensing vectors, each of the plurality of sensing vectors for sensing a respective one of the cardiac electrogram signals; for each of a plurality of cardiac cycles, setting a detection window in each of the plurality of sensing vectors; determining, for each of the detection windows, one or more signal differences between a sensing threshold and an amplitude of a portion of the respective sensed cardiac electrogram signal occurring within the detection window; ranking each of the sensing vectors of the plurality of sensing vectors relative to each other based on a vector selection metric determined based on the signal differences; selecting one or more sensing vectors of the plurality of sensing vectors based on the determined rankings; sensing via the selected one or more sensing vectors, one or more cardiac electrogram signals indicative of cardiac arrythmia in the patient; and in response to sensing the one or more cardiac electrogram signals indicative of cardiac arrythmia in the patient, controlling delivery of a therapeutic signal to the patient.
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Specification