Baseline determination for phrenic nerve stimulation detection
First Claim
1. A method, comprising:
- detecting pace-induced phrenic nerve stimulation using a sensed physiological signal, wherein the pace-induced phrenic nerve stimulation is phrenic nerve stimulation induced by cardiac paces, wherein the detecting pace-induced phrenic nerve stimulation includes;
sampling the sensed physiological signal that is used to detect pace-induced phrenic nerve stimulation during each of a plurality of cardiac cycles to provide a plurality of sampled signals corresponding to the plurality of cardiac cycles, wherein sampling the sensed physiological signal includes;
identifying a pace time window for each of the cardiac cycles to avoid cardiac components and phrenic nerve stimulation components; and
sampling the sensed physiological signal that is used to detect pace-induced phrenic nerve stimulation during the pace time window to provide sampled signals, wherein the sampled signals during the pace time window do not have cardiac components and phrenic nerve stimulation components;
calculating a baseline level for the sensed physiological signal that is used to detect pace-induced phrenic nerve stimulation using the plurality of sampled signals corresponding to the plurality of cardiac cycles; and
detecting pace-induced phrenic nerve stimulation using the sensed physiological signal and the calculated baseline level; and
changing a pacing configuration for pacing the heart in response to detected pace-induced phrenic nerve stimulation.
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Abstract
Some method examples may include pacing a heart with cardiac paces, sensing a physiological signal for use in detecting pace-induced phrenic nerve stimulation, performing a baseline level determination process to identify a baseline level for the sensed physiological signal, and detecting pace-induced phrenic nerve stimulation using the sensed physiological signal and the calculated baseline level. Detecting pace-induced phrenic nerve stimulation may include sampling the sensed physiological signal during each of a plurality of cardiac cycles to provide sampled signals and calculating the baseline level for the physiological signal using the sampled signals. Sampling the sensed physiological signal may include sampling the signal during a time window defined using a pace time with each of the cardiac cycles to avoid cardiac components and phrenic nerve stimulation components in the sampled signal.
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Citations
20 Claims
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1. A method, comprising:
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detecting pace-induced phrenic nerve stimulation using a sensed physiological signal, wherein the pace-induced phrenic nerve stimulation is phrenic nerve stimulation induced by cardiac paces, wherein the detecting pace-induced phrenic nerve stimulation includes; sampling the sensed physiological signal that is used to detect pace-induced phrenic nerve stimulation during each of a plurality of cardiac cycles to provide a plurality of sampled signals corresponding to the plurality of cardiac cycles, wherein sampling the sensed physiological signal includes; identifying a pace time window for each of the cardiac cycles to avoid cardiac components and phrenic nerve stimulation components; and sampling the sensed physiological signal that is used to detect pace-induced phrenic nerve stimulation during the pace time window to provide sampled signals, wherein the sampled signals during the pace time window do not have cardiac components and phrenic nerve stimulation components; calculating a baseline level for the sensed physiological signal that is used to detect pace-induced phrenic nerve stimulation using the plurality of sampled signals corresponding to the plurality of cardiac cycles; and detecting pace-induced phrenic nerve stimulation using the sensed physiological signal and the calculated baseline level; and changing a pacing configuration for pacing the heart in response to detected pace-induced phrenic nerve stimulation. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
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13. A method, comprising:
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pacing a heart with cardiac paces; sensing a physiological signal for use in detecting pace-induced phrenic nerve stimulation, wherein the pace-induced phrenic nerve stimulation is phrenic nerve stimulation induced by the cardiac paces; performing a baseline level determination process to identify a baseline level for the sensed physiological signal, including; sampling the sensed physiological signal during each of a plurality of cardiac cycles to provide a plurality of sampled signals corresponding to the plurality of cardiac cycles, wherein sampling the sensed physiological signal includes identifying a pace time window in each of the cardiac cycles to avoid cardiac components and phrenic nerve stimulation components and sampling the signal during the pace time window to provide sampled signals, wherein the sampled signals during the pace time window do not have cardiac components and phrenic nerve stimulation components; and calculating the baseline level for the sensed physiological signal that is used to detect pace-induced phrenic nerve stimulation using the plurality of sampled signals corresponding to the plurality of cardiac cycles; detecting pace-induced phrenic nerve stimulation using the sensed physiological signal and the calculated baseline level; and changing a pacing configuration for pacing the heart in response to detected pace-induced phrenic nerve stimulation. - View Dependent Claims (14, 15, 16, 17)
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18. A system comprising a phrenic nerve stimulation detector configured to detect a pace-induced phrenic nerve stimulation using a sensed physiological signal, wherein the phrenic nerve stimulation detector is configured to:
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identify a pace time window with each of the cardiac cycles to avoid cardiac components and phrenic nerve stimulation components; sample the sensed physiological signal that is used to detect pace-induced phrenic nerve stimulation during the pace time window to provide a plurality of sampled signals corresponding to the plurality of cardiac cycles, wherein the sampled signals during the pace time window do not have cardiac components and phrenic nerve stimulation components; calculate a baseline level for the sensed physiological signal that is used to detect pace-induced phrenic nerve stimulation using the plurality of sampled signals corresponding to the plurality of cardiac cycles; detect pace-induced phrenic nerve stimulation using the sensed physiological signal and the calculated baseline level; and change a pacing configuration for pacing the heart in response to detected pace-induced phrenic nerve stimulation, wherein the phrenic nerve stimulation detector includes a memory for storing a queue of sampled signals, the phrenic nerve stimulation detector is configured to store the sampled signals in the queue and calculate the baseline level using the sampled signals stored in the queue, the phrenic nerve stimulation detector is configured to sample the sensed physiological signal during subsequent cardiac cycles to move subsequent sampled signals into the queue, and dynamically adjust the baseline level for the physiological signal using the subsequent sampled signals in the queue. - View Dependent Claims (19, 20)
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Specification