ADAPTIVE PHRENIC NERVE STIMULATION DETECTION
First Claim
1. A system, comprising:
- a cardiac pulse generator configured to generate cardiac paces to pace the heart;
a sensor configured to sense a physiological signal for use in detecting pace-induced phrenic nerve stimulation (PS), wherein the pace-induced phrenic nerve stimulation is phrenic nerve stimulation induced by electrical cardiac pace signals;
a storage for storing patient-specific PS features for PS beats with a desirably large signal-to-noise ratio, wherein the PS beats are cardiac paces that induce PS; and
a phrenic nerve stimulation detector configured to;
detect PS features for the patient by analyzing a PS beat with a desirably large signal-to-noise ratio induced using a pacing pulse with a large energy output, and store patient-specific PS features in the storage; and
use the patient-specific PS features stored in the storage to detect PS beats when the heart is paced heart using cardiac pacing pulses with a smaller energy output.
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Accused Products
Abstract
An example of a system comprises a cardiac pulse generator configured to generate cardiac paces to pace the heart, a sensor configured to sense a physiological signal for use in detecting pace-induced phrenic nerve stimulation (PS), a storage, and a phrenic nerve stimulation detector. The storage is configured for use to store patient-specific PS features for PS beats with a desirably large signal-to-noise ratio. The phrenic nerve stimulation detector may be configured to detect PS features for the patient by analyzing a PS beat with a desirably large signal-to-noise ratio induced using a pacing pulse with a large energy output and store patient-specific PS features in the storage, and use the patient-specific PS features stored in the memory to detect PS beats when the heart is paced heart using cardiac pacing pulses with a smaller energy output.
88 Citations
20 Claims
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1. A system, comprising:
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a cardiac pulse generator configured to generate cardiac paces to pace the heart; a sensor configured to sense a physiological signal for use in detecting pace-induced phrenic nerve stimulation (PS), wherein the pace-induced phrenic nerve stimulation is phrenic nerve stimulation induced by electrical cardiac pace signals; a storage for storing patient-specific PS features for PS beats with a desirably large signal-to-noise ratio, wherein the PS beats are cardiac paces that induce PS; and a phrenic nerve stimulation detector configured to; detect PS features for the patient by analyzing a PS beat with a desirably large signal-to-noise ratio induced using a pacing pulse with a large energy output, and store patient-specific PS features in the storage; and use the patient-specific PS features stored in the storage to detect PS beats when the heart is paced heart using cardiac pacing pulses with a smaller energy output. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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12. A method for detecting PS beats in a patient, wherein the PS beats are cardiac paces that induce phrenic nerve stimulation, the method comprising:
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detecting PS features for the patient, including; pacing the heart using a pacing pulse with a large energy output to induce a PS beat with a desirably large signal-to-noise ratio; and analyzing the PS beat with the desirably large signal-to-noise ratio to identify PS features for the patient; pacing the heart using cardiac pacing pulses with a smaller energy output; and using the PS features to detect PS beats induced by the cardiac pacing pulses with the smaller energy output. - View Dependent Claims (13, 14, 15, 16, 17, 18, 19)
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20. A method for selecting a pacing vector from a plurality of available pacing vectors for use to pace a heart of a patient, comprising:
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detecting PS features for PS beats in the patient for each of the plurality of available pacing vectors, wherein the PS beats are cardiac paces that induce phrenic nerve stimulation, and detecting PS features includes, for each of the plurality of available pacing vectors, pacing the heart using a pacing pulse with a large energy output to induce a PS beat with a desirably large signal-to-noise ratio, and analyzing the PS beat with the desirably large signal-to-noise ratio to identify patient-specific PS features; pacing the heart for each of the plurality of available pacing vectors using cardiac pacing pulses including sweeping a pacing energy output according to a protocol, using the PS features to detect PS beats induced by the cardiac pacing pulses, and determining a PS threshold for each of the plurality of available pacing vectors, wherein the PS threshold is a smallest pacing energy output that induce PS beats; and identifying at least one of the plurality of available pacing vectors with a large PS threshold for use to pace the heart.
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Specification