Synchronization of electrical stimulation therapy to treat cardiac arrhythmias
First Claim
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1. A method comprising:
- receiving a signal indicative of activity of a heart of a patient;
detecting beats within the signal;
detecting a suspected cardiac arrhythmia based on a plurality of the detected beats;
initiating charging of at least one component of an implantable device configured to deliver a shock to the heart of the patient to treat the cardiac arrhythmia in response to detecting the suspected cardiac arrhythmia;
analyzing the plurality of beats subsequent to the detection of the suspected cardiac arrhythmia to determine a beat discriminator;
in response to completion of the charging, applying the beat discriminator to the signal to identify a beat subsequent to the completion of the charging; and
synchronizing delivery of the shock to the identified beat.
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Abstract
Systems and methods are described for analyzing a plurality of beats after detection of a suspected cardiac arrhythmia to determine a beat discriminator, identify a beat subsequent to completion of charging of an implantable medical device by applying the beat discriminator, and synchronize delivery of a shock from the medical device to the identified beat. In some examples, identifying the beat using the beat discriminator may help to accurately synchronize the shock with a beat representative of physiological cardiac events instead of an oversensed beat, e.g., noise sensed signal that is misclassified as a cardiac beat.
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Citations
24 Claims
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1. A method comprising:
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receiving a signal indicative of activity of a heart of a patient; detecting beats within the signal; detecting a suspected cardiac arrhythmia based on a plurality of the detected beats; initiating charging of at least one component of an implantable device configured to deliver a shock to the heart of the patient to treat the cardiac arrhythmia in response to detecting the suspected cardiac arrhythmia; analyzing the plurality of beats subsequent to the detection of the suspected cardiac arrhythmia to determine a beat discriminator; in response to completion of the charging, applying the beat discriminator to the signal to identify a beat subsequent to the completion of the charging; and synchronizing delivery of the shock to the identified beat. - View Dependent Claims (2, 3, 11, 12)
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4. A method, comprising:
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receiving a signal indicative of activity of a heart of a patient; detecting beats within the signal; detecting a suspected cardiac arrhythmia based on a plurality of the detected beats; initiating charging of at least one component of an implantable device configured to deliver a shock to the heart of the patient to treat the cardiac arrhythmia in response to detecting the suspected cardiac arrhythmia; analyzing the plurality of beats subsequent to the detection of the suspected cardiac arrhythmia to determine a beat discriminator; in response to completion of the charging, applying the beat discriminator to the signal to identify a beat subsequent to the completion of the charging; and synchronizing delivery of the shock to the identified beat, wherein analyzing the plurality of beats subsequent to the detection of the suspected cardiac arrhythmia to determine a beat discriminator comprises; analyzing a plurality of amplitude values, wherein each of the plurality of amplitude values is associated with a respective one of the plurality of beats; and determining that the plurality of amplitude values comprises a first group of amplitude values and a second group of amplitude values based on analyzing the plurality of amplitude values, wherein applying the beat discriminator to the signal to identify a beat comprises identifying a beat having an amplitude value falling within the first group of amplitude values. - View Dependent Claims (5, 6, 7, 8, 9, 10)
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13. A system comprising:
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a signal generator configured to deliver a shock to a heart of a patient to treat a cardiac arrhythmia of the patient; a sensing module configured to sense a signal indicative of activity of the heart of the patient; and a processor comprising; a signal receiving module configured to receive the signal, a beat detection module configured to detect beats within the signal, an arrhythmia detection module configured to detect a suspected cardiac arrhythmia based on a plurality of the detected beats, a charge initiating module configured to initiate charging of at least one component of the signal generator in response to detecting the suspected cardiac arrhythmia, a beat analysis module configured to analyze the plurality of the beats subsequent to the detection of the suspected cardiac arrhythmia to determine a beat discriminator, a beat identification module configured to, in response to completion of the charging of the signal generator, apply the beat discriminator to the signal to identify a beat subsequent to the completion of the charging of the signal generator, and a shock synchronization module configured to control the signal generator to synchronize delivery of the shock to the identified beat. - View Dependent Claims (14)
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15. A system, comprising:
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a signal generator configured to deliver a shock to a heart of a patient to treat a cardiac arrhythmia of the patient; a sensing module configured to sense a signal indicative of activity of the heart of the patient; and a processor comprising; a signal receiving module configured to receive the signal, a beat detection module configured to detect beats within the signal, an arrhythmia detection module configured to detect a suspected cardiac arrhythmia based on a plurality of the detected beats, a charge initiating module configured to initiate charging of at least one component of the signal generator in response to detecting the suspected cardiac arrhythmia, a beat analysis module configured to analyze the plurality of the beats subsequent to the detection of the suspected cardiac arrhythmia to determine a beat discriminator, a beat identification module configured to, in response to completion of the charging of the signal generator, apply the beat discriminator to the signal to identify a beat subsequent to the completion of the charging of the signal generator, and a shock synchronization module configured to control the signal generator to synchronize delivery of the shock to the identified beat, wherein the beat analysis module analyzes the plurality of beats by analyzing a plurality of amplitude values, wherein each of the plurality of amplitude values is associated with a respective one of the plurality of beats, and determines that the plurality of amplitude values comprises a first group of amplitude values and a second group of amplitude values based on analyzing the plurality of amplitude values, and wherein the beat identification module applies the beat discriminator to the signal to identify a beat by identifying a beat having an amplitude value falling within the first group of amplitude values. - View Dependent Claims (16, 17, 18)
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19. A system comprising:
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means for receiving a signal indicative of activity of a heart of a patient; means for detecting beats within the signal; means for detecting a suspected cardiac arrhythmia based on a plurality of the detected beats; means for initiating charging of at least one component of an implantable device configured to deliver a shock to the heart of the patient to treat the cardiac arrhythmia in response to detecting the suspected cardiac arrhythmia; means for analyzing the plurality of the beats subsequent to the detection of the suspected cardiac arrhythmia to determine a beat discriminator; means for, in response to completion of the charging, applying the beat discriminator to the signal to identify a beat subsequent to the completion of the charging; and means for synchronizing delivery of the shock to the identified beat.
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20. A system, comprising:
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means for receiving a signal indicative of activity of a heart of a patient; means for detecting beats within the signal; means for detecting a suspected cardiac arrhythmia based on a plurality of the detected beats; means for initiating charging of at least one component of an implantable device configured to deliver a shock to the heart of the patient to treat the cardiac arrhythmia in response to detecting the suspected cardiac arrhythmia; means for analyzing the plurality of the beats subsequent to the detection of the suspected cardiac arrhythmia to determine a beat discriminator; means for, in response to completion of the charging, applying the beat discriminator to the signal to identify a beat subsequent to the completion of the charging; and means for synchronizing delivery of the shock to the identified beat, wherein the means for analyzing a plurality of the beats analyzes the plurality of beats by analyzing a plurality of amplitude values, wherein each of the plurality of amplitude values is associated with a respective one of the plurality of beats, and determines that the plurality of amplitude values comprises a first group of amplitude values and a second group of amplitude values based on analyzing the plurality of amplitude values, and wherein the means for applying the beat discriminator applies the beat discriminator to the signal to identify a beat by identifying a beat having an amplitude value falling within the first group of amplitude values. - View Dependent Claims (21)
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22. A non-transitory computer-readable storage medium comprising instructions that cause a processor to:
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receive a signal indicative of activity of a heart of a patient; detect beats within the signal; detect a suspected cardiac arrhythmia based on a plurality of the detected beats; initiate charging of at least one component of an implantable device configured to deliver a shock to the heart of the patient to treat the cardiac arrhythmia in response to detecting the suspected cardiac arrhythmia; analyze the plurality of the beats subsequent to the detection of the suspected cardiac arrhythmia to determine a beat discriminator; in response to completion of the charging, apply the beat discriminator to the signal to identify a beat subsequent to the completion of the charging; and synchronize delivery of the shock to the identified beat.
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23. A non-transitory computer-readable storage medium, comprising:
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receive a signal indicative of activity of a heart of a patient; detect beats within the signal; detect a suspected cardiac arrhythmia based on a plurality of the detected beats; initiate charging of at least one component of an implantable device configured to deliver a shock to the heart of the patient to treat the cardiac arrhythmia in response to detecting the suspected cardiac arrhythmia; analyze the plurality of the beats subsequent to the detection of the suspected cardiac arrhythmia to determine a beat discriminator; in response to completion of the charging, apply the beat discriminator to the signal to identify a beat subsequent to the completion of the charging; and synchronize delivery of the shock to the identified beat, wherein the instructions cause the processor to analyze the plurality of beats subsequent to the detection of the suspected cardiac arrhythmia to determine a beat discriminator analyzing a plurality of amplitude values, wherein each of the plurality of amplitude values is associated with a respective one of the plurality of beats, and determine that the plurality of amplitude values comprises a first group of amplitude values and a second group of amplitude values based on analyzing the plurality of amplitude values, wherein the instructions cause the processor to apply the beat discriminator to the signal to identify a beat by identifying a beat having an amplitude value falling within the first group of amplitude values. - View Dependent Claims (24)
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Specification