Therapy delivery for identified tachyarrhythmia episode types
First Claim
1. A method of operating a cardiac system that includes an implantable cardiac device that is implanted in a patient, the implantable cardiac device including implantable electrodes adapted to be positioned at respective specific sites within the patient, the method comprising:
- for a first period of time;
sensing and storing electrogram signals of cardiac electrical activity from the patient in the implantable cardiac device, the sensing being carried out using the implantable electrodes;
detecting first intrinsic tachyarrhythmia episodes using the electrogram signals; and
identifying first tachyarrhythmia episode morphology types based on morphological characteristics of the electrogram signals for the detected first intrinsic tachyarrhythmia episodes; and
after the first period of time, in preparation for performing ablation;
inducing a tachyarrhythmia episode;
sensing electrogram signals from the induced tachyarrhythmia episode using the implantable electrodes;
using the sensed electrogram signals from the induced tachyarrhythmia episode to compare morphological characteristics of the induced tachyarrhythmia episode to the morphological characteristics of the detected first intrinsic tachyarrhythmia episodes; and
indicating a similarity between the induced tachyarrhythmia episode and at least one of the first tachyarrhythmia episode morphology types identified from the stored electrogram signals to facilitate performing the ablation;
wherein the method further comprises;
for each identified first tachyarrhythmia episode morphology type, determining how many of the detected first intrinsic tachyarrhythmia episodes exhibited that identified episode morphology type; and
for each identified first tachyarrhythmia episode morphology type, displaying a number of how many first intrinsic tachyarrhythmia episodes were detected for that identified episode morphology type.
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Abstract
Methods and systems for identifying tachyarrhythmia episode types and delivering therapy to mitigate the identified tachyarrhythmia episode types are described. Electrogram signals of cardiac activity are sensed and stored by an implantable cardiac device. Tachyarrhythmia episodes are detected and tachyarrhythmia episode types are identified based on characteristics of the electrogram signals. In preparation for performing ablation, a tachyarrhythmia episode is induced. The features of the induced tachyarrhythmia episode are compared to characteristics of the identified episode types. A similarity between the induced tachyarrhythmia episode and at least one of the episode types identified from the stored electrogram signals is indicated to facilitate performing the ablation.
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Citations
22 Claims
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1. A method of operating a cardiac system that includes an implantable cardiac device that is implanted in a patient, the implantable cardiac device including implantable electrodes adapted to be positioned at respective specific sites within the patient, the method comprising:
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for a first period of time; sensing and storing electrogram signals of cardiac electrical activity from the patient in the implantable cardiac device, the sensing being carried out using the implantable electrodes; detecting first intrinsic tachyarrhythmia episodes using the electrogram signals; and identifying first tachyarrhythmia episode morphology types based on morphological characteristics of the electrogram signals for the detected first intrinsic tachyarrhythmia episodes; and after the first period of time, in preparation for performing ablation; inducing a tachyarrhythmia episode; sensing electrogram signals from the induced tachyarrhythmia episode using the implantable electrodes; using the sensed electrogram signals from the induced tachyarrhythmia episode to compare morphological characteristics of the induced tachyarrhythmia episode to the morphological characteristics of the detected first intrinsic tachyarrhythmia episodes; and indicating a similarity between the induced tachyarrhythmia episode and at least one of the first tachyarrhythmia episode morphology types identified from the stored electrogram signals to facilitate performing the ablation; wherein the method further comprises; for each identified first tachyarrhythmia episode morphology type, determining how many of the detected first intrinsic tachyarrhythmia episodes exhibited that identified episode morphology type; and for each identified first tachyarrhythmia episode morphology type, displaying a number of how many first intrinsic tachyarrhythmia episodes were detected for that identified episode morphology type. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
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13. A cardiac system , comprising:
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an implantable sensing system configured to sense and store electrogram signals from a patient , the electrogram signals obtained using implantable electrodes adapted to be positioned at respective specific sites within the patient; an implantable tachyarrhythmia detector configured to detect first intrinsic tachyarrhythmia episodes using the electrogram signals and to determine morphological characteristics of the detected first intrinsic tachyarrhythmia episodes from the electrogram signals, the detector further configured to detect, using the implantable electrodes, a tachyarrhythmia episode induced in preparation for performing ablation; a data processor configured to; identify episode morphology types that historically have been experienced by the patient based on the morphological characteristics of the detected first intrinsic tachyarrhythmia episodes; determine how many of the detected first intrinsic tachyarrhythmia episodes are associated with each identified episode morphology type; and determine a similarity between the induced tachyarrhythmia episode and at least one of the identified episode morphology types; and a display configured to; display a number of how many detected first intrinsic tachyarrhythmia episodes are counted for each identified episode morphology type; and present information related to the similarity between the induced tachyarrhythmia episode and the at least one identified episode morphology type to facilitate performing the ablation. - View Dependent Claims (14, 15, 16, 17, 18, 19, 20)
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21. A system, comprising:
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an implantable sensing system configured to sense electrogram signals from a patient using implantable electrodes adapted to be positioned at respective specific sites within the patient; an implantable tachyarrhythmia detector configured to detect first intrinsic tachyarrhythmia episodes using the electrogram signals and to determine morphological characteristics of the first intrinsic tachyarrhythmia episodes from the electrogram signals; means for identifying episode morphology types based on the morphological characteristics of the first intrinsic tachyarrhythmia episodes that have been detected in the patient over a first period of time; means for determining a similarity between one or more of the identified episode morphology types and a tachyarrhythmia episode that is induced in the patient after the first period of time in preparation for performing ablation; means for determining how many of the detected first intrinsic tachyarrhythmia episodes are associated with each identified episode morphology type; and means for displaying a number of how many first intrinsic tachyarrhythmia episodes were detected for each identified episode morphology type. - View Dependent Claims (22)
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Specification