Recovery of cardiac event sensing and rhythm detection following electrical stimulation pulse delivery
First Claim
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1. A method performed by a medical device, comprising:
- delivering an electrical shock by a therapy delivery module of the medical device to a heart of a patient via a plurality of electrodes coupled to the medical device;
determining a pre-shock cardiac event amplitude prior to delivering the electrical shock; and
automatically adjusting a cardiac event sensing threshold in response to the electrical shock delivery and according to a post-shock decay sequence, the post-shock decay sequence controlled by a sensing module of the medical device according to a set of sensing control parameters comprising at least one sensing control parameter based on the pre-shock cardiac event amplitude, and wherein adjusting the cardiac event sensing threshold includes adjusting the cardiac event sensing threshold to decay at a post-shock sequence decay rate, wherein the post-shock sequence decay rate is based on the pre-shock cardiac event amplitude.
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Abstract
A medical device is configured to deliver an electrical stimulation pulse to a heart of a patient, determine a pre-stimulation cardiac event amplitude prior to delivering the electrical stimulation pulse and adjust a cardiac event sensing threshold according to a first post-stimulation decay sequence in response to the electrical stimulation pulse delivery. The first post-stimulation decay sequence is controlled by a sensing module of the medical device according to a first set of sensing control parameters including at least one sensing control parameter based on the pre-stimulation cardiac event amplitude.
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Citations
35 Claims
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1. A method performed by a medical device, comprising:
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delivering an electrical shock by a therapy delivery module of the medical device to a heart of a patient via a plurality of electrodes coupled to the medical device; determining a pre-shock cardiac event amplitude prior to delivering the electrical shock; and automatically adjusting a cardiac event sensing threshold in response to the electrical shock delivery and according to a post-shock decay sequence, the post-shock decay sequence controlled by a sensing module of the medical device according to a set of sensing control parameters comprising at least one sensing control parameter based on the pre-shock cardiac event amplitude, and wherein adjusting the cardiac event sensing threshold includes adjusting the cardiac event sensing threshold to decay at a post-shock sequence decay rate, wherein the post-shock sequence decay rate is based on the pre-shock cardiac event amplitude. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16)
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17. A medical device comprising:
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a therapy delivery module configured to generate and deliver an electrical shock to a patient'"'"'s heart via a plurality of electrodes coupled to the medical device; a sensing module configured to receive a cardiac electrical signal and produce cardiac event signals in response to the cardiac electrical signal crossing a cardiac event sensing threshold; and a control module coupled to the sensing module and the therapy delivery module and configured to receive the cardiac event signals from the sensing module and control the therapy delivery module to deliver the electrical shock, the control module configured to determine a pre-shock cardiac event amplitude prior to delivery of the electrical shock, the sensing module further configured to adjust a cardiac event sensing threshold in response to delivery of the electrical shock by the therapy delivery module and according to a post-shock decay sequence, the post-shock decay sequence controlled by a set of sensing control parameters comprising at least one sensing control parameter based on the pre-shock cardiac event amplitude, and wherein to adjust the cardiac event sensing threshold according to the post-shock decay sequence, the sensing module is configured to adjust the cardiac event sensing threshold to decay at a post-shock sequence decay rate, wherein the post-shock sequence decay rate is based on the pre-shock cardiac event amplitude. - View Dependent Claims (18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33)
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34. A non-transitory, computer-readable medium storing a set of instructions which, when executed by a control module of a medical device, cause the medical device to:
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deliver an electrical shock to a heart of a patient via a plurality of electrodes coupled to the medical device; determine a pre-shock cardiac event amplitude prior to delivering the electrical shock; and adjust a cardiac event sensing threshold in response to the electrical shock delivery and according to a post-shock decay sequence, the post-shock decay sequence controlled by a set of sensing control parameters comprising at least one sensing control parameter based on the pre-shock cardiac event amplitude, and wherein to adjust the cardiac event sensing threshold, the instructions cause the medical device to adjust the cardiac event sensing threshold to decay at a post-shock sequence decay rate, wherein the post-shock sequence decay rate is based on the pre-shock cardiac event amplitude. - View Dependent Claims (35)
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Specification