Cardiac event sensing and pacing after delivery of an electrical stimulation pulse
First Claim
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1. A method performed by a medical device, comprising:
- delivering an electrical shock to a heart of a patient;
setting an escape interval timer to start running an escape interval after delivering the electrical shock;
obtaining a cardiac electrical signal;
determining that the obtained cardiac electrical signal crosses a sensing threshold during the escape interval;
detecting a cardiac event within the cardiac electrical signal in response to determining the cardiac electrical signal obtained by the medical device crosses the sensing threshold during the escape interval;
determining if the detected cardiac event meets reset criteria, the reset criteria being different than the sensing threshold;
allowing the escape interval timer to continue running the escape interval if the detected cardiac event does not meet the reset criteria; and
resetting the escape interval timer if the detected cardiac event meets the reset criteria.
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Abstract
A medical device is configured to deliver a shock to a patient'"'"'s heart via electrodes coupled to the medical device and set an escape interval timer to start running an escape interval after delivering the electrical shock. A sensing module of the medical device is configured to sense a cardiac event in response to a cardiac electrical signal received by the medical device crossing a sensing threshold. The medical device determines if the cardiac event meets reset criteria and allows the escape interval timer to continue running the escape interval if the cardiac event does not meet the reset criteria.
41 Citations
31 Claims
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1. A method performed by a medical device, comprising:
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delivering an electrical shock to a heart of a patient; setting an escape interval timer to start running an escape interval after delivering the electrical shock; obtaining a cardiac electrical signal; determining that the obtained cardiac electrical signal crosses a sensing threshold during the escape interval; detecting a cardiac event within the cardiac electrical signal in response to determining the cardiac electrical signal obtained by the medical device crosses the sensing threshold during the escape interval; determining if the detected cardiac event meets reset criteria, the reset criteria being different than the sensing threshold; allowing the escape interval timer to continue running the escape interval if the detected cardiac event does not meet the reset criteria; and resetting the escape interval timer if the detected cardiac event meets the reset criteria. - 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 deliver an electrical shock to a patient'"'"'s heart via electrodes coupled to the medical device; a sensing module configured to receive a cardiac electrical signal, determine that the cardiac electrical signal crosses a sensing threshold, detect a cardiac event within the cardiac electrical signal in response to determining the cardiac electrical signal crosses the sensing threshold, and produce a cardiac event sense signal in response to detecting the cardiac event; and a control module coupled to the sensing module and the therapy delivery module and configured to; set an escape interval timer to start running an escape interval after the therapy delivery module delivers the electrical shock, in response to receiving the cardiac event sense signal from the sensing module during the escape interval timer, determine if the detected cardiac event meets reset criteria, allow the escape interval timer to continue running the escape interval if the detected cardiac event does not meet the reset criteria, and reset the escape interval timer in response to the detected cardiac event meeting the reset criteria. - View Dependent Claims (18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30)
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31. 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 a shock to a patient'"'"'s heart via electrodes coupled to the medical device set an escape interval timer to start running an escape interval after delivering the electrical shock; obtain a cardiac electrical signal; determine that the obtained cardiac electrical signal crosses a sensing threshold during the escape interval; detect an R-wave within the obtained cardiac electrical signal in response to determining the cardiac electrical signal crosses the sensing threshold; determine if the R-wave meets reset criteria; and allow the escape interval timer to continue running the escape interval if the R-wave does not meet the reset criteria and reset the escape interval timer in response to the R-wave meeting the reset criteria.
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Specification