Shock therapy for monomorphic detected ventricular tachycardia
First Claim
1. A method performed by a medical device, comprising:
- sensing a cardiac signal using a plurality of electrodes coupled to a sensing module of the medical device;
detecting a ventricular tachycardia in response to the cardiac signal;
initiating, by a control module, charging of a capacitor to deliver a programmed shock energy for treating a polymorphic ventricular tachycardia in response to detecting the ventricular tachycardia;
determining by a processor if the ventricular tachycardia during the charging is monomorphic;
responsive to the ventricular tachycardia being monomorphic during the charging, terminating the charging of the capacitor; and
delivering a shock pulse at less than the programmed shock energy.
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Accused Products
Abstract
An implantable medical device system detects and treats monomorphic ventricular tachycardia (VT). The system includes a sensing module for receiving a cardiac signal and a therapy delivery module including a capacitor and an output circuit. A control module is coupled to the sensing module and the therapy delivery module and is configured to detect a tachycardia from the cardiac signal and initiate charging of the capacitor in response to detecting the tachycardia. The control module performs a method for simultaneously monitoring a voltage on the capacitor and a morphology of the cardiac signal during the charging and controls the therapy delivery circuit to deliver a shock pulse at less than a programmed shock energy in response to both the voltage reaching at least a minimum voltage and the morphology being monomorphic.
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Citations
24 Claims
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1. A method performed by a medical device, comprising:
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sensing a cardiac signal using a plurality of electrodes coupled to a sensing module of the medical device; detecting a ventricular tachycardia in response to the cardiac signal; initiating, by a control module, charging of a capacitor to deliver a programmed shock energy for treating a polymorphic ventricular tachycardia in response to detecting the ventricular tachycardia; determining by a processor if the ventricular tachycardia during the charging is monomorphic; responsive to the ventricular tachycardia being monomorphic during the charging, terminating the charging of the capacitor; and delivering a shock pulse at less than the programmed shock energy. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A medical device, comprising:
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a plurality of electrodes for acquiring a cardiac signal; a sensing module coupled to the plurality of electrodes for sensing the cardiac signal; a therapy delivery circuit coupled to the plurality of electrodes for delivering a shock pulse; a control module configured to initiate charging of a capacitor to a voltage required to deliver the shock pulse at a programmed shock energy in response to detecting the ventricular tachycardia; and a processor configured to determine if the ventricular tachycardia is monomorphic during the charging, the control module configured; terminate the charging of the capacitor in response to the ventricular tachycardia being monomorphic during the charging, and control the therapy delivery circuit to deliver a shock pulse at less than the programmed shock energy. - View Dependent Claims (12, 13, 14, 15, 16, 17, 18, 19, 20, 21)
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22. A non-transitory, computer-readable medium storing a set of instructions, which cause a medical device to perform a method comprising:
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sensing a cardiac signal using a plurality of electrodes coupled to a sensing module of the medical device; detecting a ventricular tachycardia in response to the cardiac signal; initiating, by a control module, charging of a capacitor to a voltage required to deliver a programmed shock energy in response to detecting the ventricular tachycardia; during the charging, determining by a processor if the cardiac signal is monomorphic ventricular tachycardia during the charging; responsive to the cardiac signal being monomorphic ventricular tachycardia during the charging, terminating the charging of the capacitor; and delivering a shock pulse at less than the programmed shock energy.
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23. A medical device, comprising:
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means for sensing a cardiac signal; means for detecting a ventricular tachycardia in response to the cardiac signal; control means for initiating charging of a capacitor to a voltage required to deliver a programmed shock energy in response to detecting the ventricular tachycardia; and processing means for determining, during the charging, if the cardiac signal occurring during the charging is monomorphic; means for terminating the charging of the capacitor in response to the cardiac signal being monomorphic ventricular tachycardia during the charging; and means for delivering a shock pulse at less than the programmed shock energy.
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24. A medical device, comprising:
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a sensing module for receiving a cardiac signal; a therapy delivery module comprising a capacitor and an output circuit; and a control module coupled to the sensing module and the therapy delivery module and configured to; detect a tachycardia from the cardiac signal, initiate charging of the capacitor in response to detecting the tachycardia, simultaneously monitor a voltage on the capacitor and a morphology of the cardiac signal during the charging; and control the therapy delivery circuit to deliver a shock pulse at less than a programmed shock energy in response to both the voltage reaching at least a minimum voltage and the morphology of the detected tachycardia being monomorphic.
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Specification