Implanted device data to guide ablation therapy
First Claim
1. A medical device system for guiding a cardiac ablation therapy, comprising;
- a plurality of implantable electrodes for sensing cardiac signals;
an implantable cardiac event detector coupled to the plurality of implantable electrodes for detecting spontaneous cardiac events from the sensed cardiac signals;
an implantable pulse generator coupled to the plurality of implantable electrodes for delivering pacing pulses;
an implantable controller to control the implantable pulse generator to deliver a first plurality of pacing pulses in response to detecting a spontaneous cardiac event using a first electrode of the plurality of implantable electrodes and measure a return cycle length in response to the first plurality of pacing pulses; and
a processor configured to cluster the spontaneous cardiac event with a previously detected spontaneous cardiac event in response to the measured return cycle length to establish a cluster of spontaneous cardiac events,wherein the implantable controller is further configured to compute a first transit time interval using the return cycle length, the computed first transit time interval corresponding to a distance traversed by a depolarization associated with the last one of the first plurality of pacing pulses when a reset condition occurs,and wherein the processor is further configured to estimate in response to the computed first transit time interval a target ablation site for treating an episode type of the cluster of spontaneous cardiac events with the ablation therapy.
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Accused Products
Abstract
A medical device system and associated method for guiding ablation therapy sense cardiac signals using implantable electrodes and detect spontaneous cardiac events from the sensed cardiac signals. Pacing pulses are delivered and a return cycle length is measured in response to the plurality of pacing pulses. The spontaneous cardiac event is clustered with a previously detected cardiac event in response to the measured return cycle length, and a targeted ablation site is estimated in response to the measured return cycle length. A transit time interval, corresponding to a distance traversed by a depolarization associated with a last one of the plurality of pacing pulses when a reset condition occurs, is computed using the return cycle length, and the ablation site is estimated in response to the computed transit time interval.
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Citations
24 Claims
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1. A medical device system for guiding a cardiac ablation therapy, comprising;
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a plurality of implantable electrodes for sensing cardiac signals; an implantable cardiac event detector coupled to the plurality of implantable electrodes for detecting spontaneous cardiac events from the sensed cardiac signals; an implantable pulse generator coupled to the plurality of implantable electrodes for delivering pacing pulses; an implantable controller to control the implantable pulse generator to deliver a first plurality of pacing pulses in response to detecting a spontaneous cardiac event using a first electrode of the plurality of implantable electrodes and measure a return cycle length in response to the first plurality of pacing pulses; and a processor configured to cluster the spontaneous cardiac event with a previously detected spontaneous cardiac event in response to the measured return cycle length to establish a cluster of spontaneous cardiac events, wherein the implantable controller is further configured to compute a first transit time interval using the return cycle length, the computed first transit time interval corresponding to a distance traversed by a depolarization associated with the last one of the first plurality of pacing pulses when a reset condition occurs, and wherein the processor is further configured to estimate in response to the computed first transit time interval a target ablation site for treating an episode type of the cluster of spontaneous cardiac events with the ablation therapy. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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12. A method for guiding a cardiac ablation therapy in a medical device system, comprising;
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sensing cardiac signals using a plurality of implantable electrodes; detecting spontaneous cardiac events from the sensed cardiac signals using an implantable cardiac event detector coupled to the plurality of implantable electrodes; delivering a first plurality of pacing pulses using a first electrode of the plurality of implantable electrodes using an implantable pulse generator coupled to the implantable electrodes in response to detecting a spontaneous cardiac event; measuring a return cycle length in response to the first plurality of pacing pulses; clustering the spontaneous cardiac event with a previously detected spontaneous cardiac event to establish a cluster of spontaneous cardiac events in response to the measured return cycle length; computing a first transit time interval using the return cycle length, the computed first transit time interval corresponding to a distance traversed by a depolarization associated with a last one of the first plurality of pacing pulses when a reset condition occurs; and estimating in response to the computed first transit time interval a target ablation site for treating an episode type of the cluster of spontaneous cardiac events with the ablation therapy. - View Dependent Claims (13, 14, 15, 16, 17, 18, 19, 20, 21, 22)
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23. A non-transitory computer-readable medium storing a set of instructions which cause a medical device system to perform a method, the method comprising:
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sensing cardiac signals using a plurality of implantable electrodes; detecting spontaneous cardiac events from the sensed cardiac signals using an implantable cardiac event detector coupled to the plurality of implantable electrodes; delivering a plurality of pacing pulses using a first electrode of the plurality of implantable electrodes using an implantable pulse generator coupled to the implantable electrodes in response to detecting a spontaneous cardiac event; measuring a return cycle length in response to the plurality of pacing pulses; clustering the spontaneous cardiac event with a previously detected spontaneous cardiac event to establish a cluster of spontaneous cardiac events in response to the measured return cycle length; computing a transit time interval using the return cycle length, the computed transit time interval corresponding to a distance traversed by a depolarization associated with a last one of the plurality of pacing pulses when a reset condition occurs; and estimating a targeted ablation site in response to the computed transit time interval for treating an episode type of the cluster of spontaneous cardiac events with an ablation therapy.
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24. A medical device system for guiding a cardiac ablation therapy, comprising;
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a plurality of implantable electrodes for sensing cardiac signals; an implantable cardiac event detector coupled to the plurality of implantable electrodes for detecting spontaneous cardiac events from the sensed cardiac signals; an implantable pulse generator coupled to the plurality of implantable electrodes for delivering pacing pulses; an implantable controller to control the pulse generator to deliver a plurality of pacing pulses in response to detecting a spontaneous cardiac event using a first electrode of the plurality of implantable electrodes and measure a return cycle length in response to the plurality of pacing pulses; a processor configured to cluster the spontaneous cardiac event with a previously detected spontaneous cardiac event to establish a cluster of spontaneous cardiac events in response to the measured return cycle length, wherein the implantable controller is further configured to compute a transit time interval using the return cycle length, the computed transit time interval corresponding to a distance traversed by a depolarization associated with the last one of the plurality of pacing pulses when a reset condition occurs, and wherein the processor is further configured to estimate a target ablation site in response to the computed transit time interval for treating an episode type of the cluster of spontaneous cardiac events with the ablation therapy; and a cardiac ablation system, wherein the ablation system, the controller, and the processor are further configured to cooperatively induce a tachycardia, compare a parameter of the induced tachycardia to a parameter of the clustered of the spontaneous cardiac events to determine if the induced tachycardia matches the cluster of spontaneous cardiac, the estimated ablation site corresponding to the cluster of spontaneous cardiac events when the induced tachycardia is determined to match the cluster of spontaneous cardiac events.
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Specification