Detection of medical electrical lead issues
First Claim
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1. An implantable cardiac device comprising:
- a sensing module electrically coupled to one or more electrodes carried by a medical electrical lead coupled to the implantable medical device, the sensing module including;
a cardiac event detector configured to receive a cardiac electrical signal sensed via at least one of the electrodes carried by the medical electrical lead coupled to the implantable medical device, detect cardiac event signals from the cardiac electrical signal, and produce a cardiac sensed event signal for each of the detected cardiac event signals; and
a spike detector distinct from the cardiac event detector and configured to receive the cardiac electrical signal, detect non-physiological spikes in the cardiac electrical signal, and produce a spike detect signal for each of the detected non-physiological spikes; and
a control module electrically coupled to the sensing module, the control module being configured to;
receive event signals comprising the cardiac sensed event signals and the spike detect signals from the sensing module;
in response to receiving each of the spike detect signals, determine an event interval defined by the respective spike detect signal and a most recent preceding event signal;
identify one or more of the received spike detect signals as lead issue spikes based on at least one of the determined event intervals;
detect a lead issue of the medical electrical lead when a threshold number of spike detect signals are identified as lead issue spikes; and
generate an alert in response to the lead issue being detected.
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Abstract
An implantable medical device includes a sensing module configured to receive a cardiac electrical signal via electrodes carried by a medical electrical lead coupled to the implantable medical device and a control module configured to detect a lead issue. The sensing module is configured to produce cardiac sensed event signals and spike detect signals. The control module is configured to determine event intervals defined by consecutive ones of the received cardiac sensed event signals and the received spike detect signals and identify one or more received spike detect signals as lead issue spikes based on at least one of the determined event intervals.
19 Citations
28 Claims
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1. An implantable cardiac device comprising:
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a sensing module electrically coupled to one or more electrodes carried by a medical electrical lead coupled to the implantable medical device, the sensing module including; a cardiac event detector configured to receive a cardiac electrical signal sensed via at least one of the electrodes carried by the medical electrical lead coupled to the implantable medical device, detect cardiac event signals from the cardiac electrical signal, and produce a cardiac sensed event signal for each of the detected cardiac event signals; and a spike detector distinct from the cardiac event detector and configured to receive the cardiac electrical signal, detect non-physiological spikes in the cardiac electrical signal, and produce a spike detect signal for each of the detected non-physiological spikes; and a control module electrically coupled to the sensing module, the control module being configured to; receive event signals comprising the cardiac sensed event signals and the spike detect signals from the sensing module; in response to receiving each of the spike detect signals, determine an event interval defined by the respective spike detect signal and a most recent preceding event signal; identify one or more of the received spike detect signals as lead issue spikes based on at least one of the determined event intervals; detect a lead issue of the medical electrical lead when a threshold number of spike detect signals are identified as lead issue spikes; and generate an alert in response to the lead issue being detected. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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12. An implantable cardiac device comprising:
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a sensing module electrically coupled to one or more electrodes carried by a medical electrical lead coupled to the implantable medical device, the sensing module including; a cardiac event detector configured to receive a cardiac electrical signal sensed via at least one of the electrodes carried by the medical electrical lead coupled to the implantable medical device, detect cardiac event signals from the cardiac electrical signal, and produce a cardiac sensed event signal for each of the detected cardiac event signals; and a spike detector configured to receive the cardiac electrical signal, detect non-physiological spikes in the cardiac electrical signal, and produce a spike detect signal for each of the detected non-physiological spikes; and a control module electrically coupled to the sensing module, the control module being configured to; receive the cardiac sensed event signals and the spike detect signals from the sensing module; determine event intervals defined by consecutive ones of the received cardiac sensed event signals and the received spike detect signals; identify one or more of the received spike detect signals as lead issue spikes based on at least one of the determined event intervals; detect a lead issue of the medical electrical lead when a threshold number of spike detect signals are identified as lead issue spikes; and generate an alert in response to the lead issue being detected wherein the control module is further configured to; establish a maximum lead issue event interval; determine the event intervals by determining at least one event interval ending with one of the received spike detect signals; compare the event interval ending with the received spike detect signal to the maximum lead issue event interval; and identify the received spike detect signal as a lead issue spike when the event interval ending with the received spike detect signal is less than the maximum lead issue event interval. - View Dependent Claims (13, 14)
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15. A method of identifying a lead issue of a medical electrical lead comprising:
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receiving a cardiac electrical signal by a sensing module of an implantable medical device via electrodes carried by the medical electrical lead coupled to the implantable medical device, detecting cardiac event signals from the cardiac electrical signal by a cardiac event detector of the sensing module; producing a cardiac sensed event signal for each of the detected cardiac event signals, detecting non-physiological spikes in the cardiac electrical signal by a spike detector of the sensing module, the spike detector being distinct from the cardiac event detector; producing a spike detect signal for each of the detected non-physiological spikes; receiving event signals by a control module of the implantable medical device, the event signals comprising the cardiac sensed event signals and the spike detect signals produced by the sensing module; in response to receiving each of the spike detect signals, determining an event interval defined by the respective spike detect signals and a most recent preceding event signal; identifying one or more of the received spike detect signals as lead issue spikes based on at least one of the determined event intervals; detecting a lead issue of the medical electrical lead when a threshold number of the spike detect signals are identified as lead issue spikes; and generating an alert in response to detecting the lead issue. - View Dependent Claims (16, 17, 18, 19, 20, 21, 22, 23, 24)
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25. A method of identifying a lead issue of a medical electrical lead comprising:
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receiving a cardiac electrical signal by a sensing module of an implantable medical device via electrodes carried by the medical electrical lead coupled to the implantable medical device, detecting cardiac event signals from the cardiac electrical signal by a cardiac event detector of the sensing module; producing a cardiac sensed event signal for each of the detected cardiac event signals, detecting non-physiological spikes in the cardiac electrical signal by a spike detector of the sensing module; producing a spike detect signal for each of the detected non-physiological spikes; establishing a maximum lead issue event interval; receiving the cardiac sensed event signals and the spike detect signals produced by the sensing module by a control module of the implantable medical device; determining event intervals defined by consecutive ones of the received cardiac sensed event signals and the received spike detect signals, wherein determining the event intervals comprises determining at least one event interval ending with one of the received spike detect signals; identifying one or more of the received spike detect signals as lead issue spikes based on at least one of the determined event intervals by comparing the event interval ending with the received spike detect signal to the maximum lead issue event interval and identifying the received spike detect signal as a lead issue spike when the event interval ending with the received spike detect signal is less than the maximum lead issue event interval; detecting a lead issue of the medical electrical lead when a threshold number of the spike detect signals are identified as lead issue spikes; and generating an alert in response to detecting the lead issue. - View Dependent Claims (26, 27)
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28. A non-transitory computer readable storage medium comprising instructions which when executed by a control module of an implantable medical device cause the implantable medical device to:
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determine event intervals defined by cardiac sensed event signals and spike detect signals produced by a cardiac event detector and a spike detector distinct from the cardiac event detector, respectively, of a sensing module of the implantable medical device, the sensing module configured to receive a cardiac electrical signal via electrodes carried by a medical electrical lead coupled to the implantable medical device and detect cardiac event signals and non-physiological spikes from the cardiac electrical signal; identify one or more of the spike detect signals as lead issue spikes based on at least one of the determined event intervals defined by a received spike detect signal and a most recent preceding event signal; detect a lead issue of the medical electrical lead when a threshold number of the spike detect signals are identified as lead issue spikes; and generate an alert in response to detecting the lead issue.
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Specification