Method and system for characterizing a representative cardiac beat using multiple templates
First Claim
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1. A method of characterizing a patient'"'"'s supraventricular rhythm, comprising:
- providing a plurality of templates;
detecting, using an implantable lead system, rate channel signals and shock channel signals of a plurality of beats;
determining if the beat signals meet predetermined criteria;
in a body implantable system, selectively updating the plurality of templates, comprising;
selecting a template of the plurality of templates for updating based on a similarity between the template and a beat of the plurality of beats; and
updating the selected template using the beat; and
characterizing, in the body implantable system, the patient'"'"'s supraventricular rhythm by identifying a particular template of the plurality of selectively updated templates as representative of the patient'"'"'s supraventricular rhythm.
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Abstract
The present invention provides a method and system for characterizing one beat of a patient'"'"'s supraventricular rhythm. A plurality of templates is provided and updated using a plurality of qualified beats. Updating occurs by temporally aligning the shock channel waveforms of the template beats using rate channel fiducial points. The template beats are combined by point-by-point addition of the shock channel waveforms. The resultant updated template characterizes one of the patient'"'"'s supraventricular conducted cardiac beats.
90 Citations
46 Claims
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1. A method of characterizing a patient'"'"'s supraventricular rhythm, comprising:
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providing a plurality of templates; detecting, using an implantable lead system, rate channel signals and shock channel signals of a plurality of beats; determining if the beat signals meet predetermined criteria; in a body implantable system, selectively updating the plurality of templates, comprising; selecting a template of the plurality of templates for updating based on a similarity between the template and a beat of the plurality of beats; and updating the selected template using the beat; and characterizing, in the body implantable system, the patient'"'"'s supraventricular rhythm by identifying a particular template of the plurality of selectively updated templates as representative of the patient'"'"'s supraventricular rhythm. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. A method of characterizing a patient'"'"'s supraventricular rhythm, comprising:
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providing a first template and a second template; detecting, using an implantable lead system, rate channel signals and shock channel signals of a plurality of beats; determining if the beat signals meet predetermined criteria; in a body implantable system, selectively updating a template based on a similarity between the template and a beat of the plurality of beats, comprising; updating the first template using the beat if the first template is selected; updating the second template using to the beat if the second template is selected; counting a first number of beats used to update the first template; counting a second number of beats used to update the second template; identifying and storing the first updated template as a particular template characterizing the patient'"'"'s supraventricular rhythm if the first number of beats used to update the first template reaches a predetermined count before the second number of beats used to update the second template reaches the predetermined count; and identifying and storing the second updated template as a particular template characterizing the patient'"'"'s supraventricular rhythm if the second number of correlated beats reaches the predetermined count before the first number of correlated beats reaching the predetermined count, the current template representing one beat of the patient'"'"'s supraventricular conducted beats. - View Dependent Claims (11, 12, 13, 14, 15, 16, 17, 18, 19, 20)
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21. A body implantable system for characterizing a patient'"'"'s supraventricular rhythm, comprising:
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a lead system, the lead system comprising electrodes and extending into a heart; a detector system, coupled to the lead system, that detects rate channel signals and shock channel signals of beats sensed by the lead system electrodes; and a control system coupled to the detector system, wherein the control system provides a plurality of templates, determines if the beat signals meet predetermined criteria, selectively updates the plurality of templates using a plurality of beats, the control system configured to select a template for updating based on a similarity between the template and a beat of the plurality of beats and to update the selected template using the beat, the control system further configured to characterize a patient'"'"'s supraventricular rhythm by identifying a particular template of the plurality of selectively updated templates as representative of the patient'"'"'s supraventricular rhythm. - View Dependent Claims (22, 23, 24, 25, 26, 27, 28, 29, 30, 31)
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32. A body implantable system for characterizing a patient'"'"'s supraventricular rhythm, comprising:
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a lead system, the lead system comprising electrodes and extending into a heart; a detector system, coupled to the lead system, that detects rate channel signals and shock channel signals of beats sensed by the lead electrodes; a control system coupled to the detector system, wherein the control system provides a first template and a second template; determines if the beat signals meet predetermined criteria; selects the first template or the second template based on a similarity between the first template or the second template and a beat of the plurality of beats; updates the first template using beats similar to the first template; updates the second template using beats similar to the second template; counts a first number of beats used to update the first template; counts a second number of beats used to update the second template; identifies and stores the first updated template as a current template representative of the patient'"'"'s supraventricular rhythm if the first number of beats reaches a predetermined count prior to the second number of correlated beats reaching the predetermined count; and identifies and stores the second updated template as the current template representative of the patient'"'"'s supraventricular rhythm if the second number of beats reaches the predetermined count prior to the first number of beats reaching the predetermined count. - View Dependent Claims (33, 34, 35, 36, 37, 38, 39, 40, 41, 42, 43, 44, 45)
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46. A body implantable system for characterizing a patient'"'"'s supraventricular rhythm, comprising:
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a lead system, the lead system comprising implantable electrodes; an implantable detector system, coupled to the lead system and configured to detect rate channel signals and shock channel signals of a plurality of beats sensed by the lead system electrodes; and an implantable control system coupled to the detector system and configured to determine if the beat signals meet predetermined criteria, the control system comprising; means for providing a plurality of templates; means for selectively updating the plurality of templates using the plurality of beats comprising; means for selecting a template for updating based on a similarity between the template and a beat of the plurality of beats; and means for updating the selected template using the beat; and means for characterizing the patient'"'"'s supraventricular rhythm by identifying a particular template of the plurality of selectively updated templates as representative of the patient'"'"'s supraventricular rhythm.
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Specification