Configurable cardioversion and defibrillation therapies in the presence of coexisting atrial and ventricular arrhythmia
First Claim
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1. An implantable medical device, comprising:
- a plurality of electrodes sensing cardiac signals within a plurality of chambers of a heart; and
control circuitry determining cardiac events in response to the sensed cardiac signals, and delivering a therapy via selected ones of the plurality of electrodes for a first determined cardiac event in response to presence of a second cardiac event, wherein the control circuitry determines, in response to the sensed cardiac signals corresponding to the second cardiac event, whether the second cardiac event is either one of a sustained cardiac event and a recent-onset cardiac event, and selects one of a first shock therapy comprising a defibrillation configuration delivered for simultaneously treating the first cardiac event and the second cardiac event in response to the second cardiac event being a recent-onset cardiac event and a second shock therapy comprising a defibrillation configuration delivered for treating only the first cardiac event and not the second cardiac event in response to the second cardiac event being a sustained cardiac event.
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Abstract
An implantable cardioverter defibrillator system and method are provided having configurable shock therapies selected based on an evaluation of the atrial rhythm status following a ventricular tachycardia or fibrillation detection. A dual chamber shock configuration is selected if the ventricular arrhythmia is co-existing with an atrial arrhythmia of recent onset. A ventricular only shock configuration is selected if the ventricular arrhythmia is co-existing with a sustained atrial arrhythmia.
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Citations
22 Claims
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1. An implantable medical device, comprising:
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a plurality of electrodes sensing cardiac signals within a plurality of chambers of a heart; and control circuitry determining cardiac events in response to the sensed cardiac signals, and delivering a therapy via selected ones of the plurality of electrodes for a first determined cardiac event in response to presence of a second cardiac event, wherein the control circuitry determines, in response to the sensed cardiac signals corresponding to the second cardiac event, whether the second cardiac event is either one of a sustained cardiac event and a recent-onset cardiac event, and selects one of a first shock therapy comprising a defibrillation configuration delivered for simultaneously treating the first cardiac event and the second cardiac event in response to the second cardiac event being a recent-onset cardiac event and a second shock therapy comprising a defibrillation configuration delivered for treating only the first cardiac event and not the second cardiac event in response to the second cardiac event being a sustained cardiac event. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A method of controlling delivery of therapy in an implantable medical device, comprising:
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sensing cardiac signals; determining whether sensed cardiac signals correspond to a first cardiac event and a second cardiac event, determining, in response to the sensed cardiac signals corresponding to the first cardiac event and the second cardiac event, whether the second cardiac event is either one of a sustained cardiac event and a recent-onset cardiac event, and selecting one of a first shock therapy comprising a first defibrillation configuration corresponding to simultaneously treating the first cardiac event and the second cardiac event in response to the second cardiac event being a recent-onset cardiac event and a second shock therapy comprising a second defibrillation configuration corresponding to treating only the first cardiac event and not the second cardiac event in response to the second cardiac event being a sustained cardiac event. - View Dependent Claims (12, 13, 14, 15, 16, 17, 18, 19, 20)
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21. A computer readable medium having computer-executable instructions for performing a method comprising:
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sensing cardiac signals; determining whether sensed cardiac signals correspond to a first cardiac event and a second cardiac event, determining, in response to the sensed cardiac signals corresponding to the first cardiac event and the second cardiac event, whether the second cardiac event is either one of a sustained cardiac event and a recent-onset cardiac event, and selecting one of a first shock therapy comprising a defibrillation configuration corresponding to simultaneously treating the first cardiac event and the second cardiac event in response to the second cardiac event being a recent-onset cardiac event and a second shock therapy comprising a defibrillation configuration corresponding to treating only the first cardiac event and not the second cardiac event in response to the second cardiac event being a sustained cardiac event.
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22. An implantable medical device, comprising:
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a plurality of electrodes sensing cardiac signals within a plurality of chambers of a heart; and control circuitry determining cardiac events in response to the sensed cardiac signals, and delivering a shock therapy via selected ones of the plurality of electrodes for a first determined cardiac event in response to presence of a second cardiac event; wherein the first cardiac event corresponds to ventricular fibrillation and the second cardiac event corresponds to one of atrial tachycardia and atrial fibrillation; wherein the control circuitry determines, in response to the sensed cardiac signals corresponding to the second cardiac event, whether the second cardiac event is either one of a sustained cardiac event and a recent-onset cardiac event, and selects one of a first shock therapy comprising a defibrillation configuration corresponding to simultaneously treating the first cardiac event and the second cardiac event in response to the second cardiac event being a recent-onset cardiac event and a second shock therapy comprising a defibrillation configuration corresponding to treating only the first cardiac event and not the second cardiac event in response to the second cardiac event being a sustained cardiac event; wherein the first shock therapy configuration comprises a single shock therapy configured to simultaneously terminate the first cardiac event and the second cardiac event and the second shock therapy configuration comprises a single shock therapy configured to terminate only the first cardiac event without terminating the second cardiac event.
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Specification