Phrenic nerve stimulation detection
First Claim
1. A method for detecting PS beats, wherein the PS beats are cardiac paces that induce phrenic nerve stimulation, the method comprising:
- pacing a heart with cardiac paces;
sensing a physiological signal for use in detecting PS beats, wherein sensing the physiological signal includes sensing beat signals from a window of time defined based on cardiac pace times;
identifying morphological features for a sensed beat signal; and
using the identified morphological features to determine if the sensed beat signal is a PS beat, wherein using the identified morphological features to determine if the sensed beat signal is a PS beat includes at least one of;
analyzing the identified morphological features using weight-based scoring of the identified morphological features, wherein weight-based scoring weights some morphological features differently when determining if the sensed beat signal is the PS beat;
oranalyzing the identified morphological features using a decision tree to determine if the sensed beat signal is the PS beat.
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Abstract
In an example, a system includes 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 where the pace-induced phrenic nerve stimulation is phrenic nerve stimulation induced by electrical cardiac pace signals, and a phrenic nerve stimulation detector configured to analyze the sensed physiological signal to detect PS beats where the PS beats are cardiac paces that induce phrenic nerve stimulation. The detector may be configured to correlate signal data for sensed beat signals to a PS template to detect PS beats, or may be configured to analyze morphological features of sensed beat signals to detect PS beats, or may be configured to detect PS beats using a combination that both correlates signal data for sensed beat signals to a PS template and analyzes morphological features of sensed beat signals.
41 Citations
20 Claims
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1. A method for detecting PS beats, wherein the PS beats are cardiac paces that induce phrenic nerve stimulation, the method comprising:
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pacing a heart with cardiac paces; sensing a physiological signal for use in detecting PS beats, wherein sensing the physiological signal includes sensing beat signals from a window of time defined based on cardiac pace times; identifying morphological features for a sensed beat signal; and using the identified morphological features to determine if the sensed beat signal is a PS beat, wherein using the identified morphological features to determine if the sensed beat signal is a PS beat includes at least one of; analyzing the identified morphological features using weight-based scoring of the identified morphological features, wherein weight-based scoring weights some morphological features differently when determining if the sensed beat signal is the PS beat;
oranalyzing the identified morphological features using a decision tree to determine if the sensed beat signal is the PS beat. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. A method for detecting PS beats, wherein the PS beats are cardiac paces that induce phrenic nerve stimulation, the method comprising:
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pacing a heart with cardiac paces; sensing a physiological signal for use in detecting PS beats, wherein sensing the physiological signal includes sensing beat signals from a window of time defined based on cardiac pace times; scoring morphological features of the sensed beat signals; using the score to identify those sensed beat signals that can be declared PS beats with a high degree of confidence and those sensed beat signals that can be declared NoPS beats with a high degree of confidence, and to identify those sensed beats that cannot be declared with the high degree of confidence as either a PS beat or a NoPS beat; and correlating those sensed beats that cannot be declared with a high degree of confidence to a PS template, and declaring the sensed beats that are correlated with the PS template to be a PS beat.
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11. 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, wherein the pace-induced phrenic nerve stimulation is phrenic nerve stimulation induced by electrical cardiac pace signals; a phrenic nerve stimulation detector configured to analyze the sensed physiological signal to detect PS beats, wherein the PS beats are cardiac paces that induce phrenic nerve stimulation, wherein; the phrenic nerve stimulation detector is configured to correlate signal data for sensed beat signals to a PS template to detect PS beats;
orthe phrenic nerve stimulation detector is configured to analyze morphological features of sensed beat signals to detect PS beats, including weight some morphological features differently to detect PS beats or use a decision tree to analyze the identified morphological features to detect PS beats;
orthe phrenic nerve stimulation detector is configured to detect PS beats using a combination that both correlates signal data for sensed beat signals to a PS template and analyzes morphological features of sensed beat signals. - View Dependent Claims (12, 13, 14, 15, 16, 17, 18, 19, 20)
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Specification