Patent ID: 9604065
Date: 2017-03-28
CPC Classifications: A61B,A61N

Claim:
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 corresponding sensor signal; a processing circuit in communication with the memory and the sensor, the processing circuit configured to: derive a time-frequency representation of the sensor signal based on the received sensor signal using wavelets; identify a dominant frequency component in the time-frequency representation of sensor signal; determine if the dominant frequency component falls within a predetermined frequency range; identify a time of occurrence of the dominant frequency component relative to a corresponding pacing pulse; determine if the time of occurrence of the dominant frequency component occurs within a predetermined time window; determine if the phrenic nerve of the patient has been stimulated based, at least in part, on the time-frequency representation of the sensor signal such that the dominant frequency component falls within the predetermined frequency range and the dominant frequency component occurs within the predetermined time window; 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.