Unwanted stimulation detection during cardiac pacing
First Claim
1. A method of controlling a cardiac pacemaker to determine if a phrenic nerve of a patient is stimulated by one or more pacing pulses of the cardiac pacemaker, the method comprising:
- delivering one or more electrical pacing stimulation pulses to the patient;
receiving a sensor signal for a time period after the one or more electrical pacing stimulation pulses, wherein the sensor signal is provided by a sensor configured to sense a stimulation of the phrenic nerve of the patient;
deriving a power spectrum based on the received sensor signal during the time after the one or more pacing pulses;
determining if the phrenic nerve of the patient has been stimulated based, at least in part, on the derived power spectrum; and
changing timing of the pacing stimulation pulses in response to determining that the phrenic nerve of the patient has been stimulated.
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Accused Products
Abstract
The disclosure relates to systems and methods for cardiac rhythm management. In some cases, a system may include a pulse generator for generating pacing pulses for stimulating a heart of a patient; a memory; and a sensor configured to sense a response to an unwanted stimulation and to produce a corresponding sensor signal. A processing circuit may receive the sensor signal for a time after one or more pacing pulses, and may derive a time-frequency representation of the sensor signal based on the received sensor signal. The processing circuit may use the time-frequency representation of the sensor signal to help identify unwanted stimulation. Once unwanted stimulation is detected, the processing circuit may change the pacing pulses to help reduce or eliminate the unwanted stimulation.
67 Citations
18 Claims
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1. A method of controlling a cardiac pacemaker to determine if a phrenic nerve of a patient is stimulated by one or more pacing pulses of the cardiac pacemaker, the method comprising:
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delivering one or more electrical pacing stimulation pulses to the patient; receiving a sensor signal for a time period after the one or more electrical pacing stimulation pulses, wherein the sensor signal is provided by a sensor configured to sense a stimulation of the phrenic nerve of the patient; deriving a power spectrum based on the received sensor signal during the time after the one or more pacing pulses; determining if the phrenic nerve of the patient has been stimulated based, at least in part, on the derived power spectrum; and changing timing of the pacing stimulation pulses in response to determining that the phrenic nerve of the patient has been stimulated. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13)
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14. A system for cardiac rhythm management, the system comprising:
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a pulse generator configured to provide electrical cardiac pacing pulse stimulation therapy to a patient; a memory; a sensor configured to sense a response to a stimulation of a phrenic nerve of the patient and to produce a sensor signal; and a processing circuit in communication with the memory and the sensor, the processing circuit configured to; receive the sensor signal; derive a power spectrum based on the received sensor signal; detect phrenic nerve stimulation from the pacing pulse stimulation therapy based, at least in part, on the derived power spectrum; and change timing of the pacing stimulation pulses in response to detecting phrenic nerve stimulation. - View Dependent Claims (15, 16, 17, 18)
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Specification