Unwanted stimulation detection during cardiac pacing

摘要

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 a 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.

主权项

1. A system for cardiac rhythm management comprising:
a pulse generator for generating pacing pulses for stimulating a heart of 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; a processing circuit in communication with the memory and the sensor, the processing circuit configured to:
receive the sensor signal; derive a time-frequency representation of the sensor signal based on the received sensor signal; determine if the phrenic nerve of the patient has been stimulated by comparing one or more of a frequency characteristic of the time-frequency representation of the sensor signal to a stored frequency band, and a time characteristic of the time-frequency representation of the sensor signal to a time window following a pacing pulse; store a phrenic nerve stimulation event identifier in the memory if the processing circuit determines that the phrenic nerve of the patient has been stimulated.