BASELINE DETERMINATION FOR PHRENIC NERVE STIMULATION DETECTION
First Claim
1. A method for analyzing a sensed physiological signal to detect pace-induced phrenic nerve stimulation, wherein the pace-induced phrenic nerve stimulation is phrenic nerve stimulation induced by cardiac paces, the method comprising:
- sampling the sensed physiological signal during each of a plurality of cardiac cycles to provide sampled signals, wherein sampling the sensed physiological signal includes 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;
calculating a baseline level for the physiological signal using the sampled signals; and
detecting pace-induced phrenic nerve stimulation using the sensed physiological signal and the calculated baseline level.
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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.
89 Citations
20 Claims
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1. A method for analyzing a sensed physiological signal to detect pace-induced phrenic nerve stimulation, wherein the pace-induced phrenic nerve stimulation is phrenic nerve stimulation induced by cardiac paces, the method comprising:
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sampling the sensed physiological signal during each of a plurality of cardiac cycles to provide sampled signals, wherein sampling the sensed physiological signal includes 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; calculating a baseline level for the physiological signal using the sampled signals; and detecting pace-induced phrenic nerve stimulation using the sensed physiological signal and the calculated baseline level. - 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 sampled signals, wherein sampling the sensed physiological signal includes 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; and calculating the baseline level for the physiological signal using the sampled signals; and detecting pace-induced phrenic nerve stimulation using the sensed physiological signal and the calculated baseline level. - View Dependent Claims (14, 15, 16, 17)
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18. A system comprising a phrenic nerve stimulation detector configured to analyze a sensed physiological signal to detect a pace-induced phrenic nerve stimulation, wherein the phrenic nerve stimulation detector is configured to:
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sample the sensed physiological signal during each of a plurality of cardiac cycles to provide sampled signals, wherein the signal is sampled 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; calculate a baseline level for the physiological signal using the sampled signals; and detect pace-induced phrenic nerve stimulation using the sensed physiological signal and the calculated baseline level, 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 use the sampled signals stored in a queue to calculate the baseline level, 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