Automated phrenic nerve stimulation and pacing capture threshold test

摘要

A medical device system performs a method for determining pacing threshold data. Signals are received from a cardiac capture sensor and a phrenic nerve stimulation sensor. A cardiac capture threshold is determined from the cardiac capture sensor signal and a phrenic nerve stimulation threshold is determined from the phrenic nerve stimulation sensor signal for multiple pacing electrode vectors.

主权项

1. An automated method for determining pacing threshold data, comprising:
receiving a signal from a cardiac capture sensor; receiving a signal from a phrenic nerve stimulation sensor; determining a cardiac capture threshold from the cardiac capture sensor signal while detecting phrenic nerve stimulation from the phrenic nerve stimulation sensor signal for each of a plurality of pacing electrode vectors, the determining comprising:
delivering a stimulation pulse via a selected one of the plurality of pacing electrode vectors using a first pacing pulse output;detecting from the phrenic nerve stimulation sensor signal whether phrenic nerve stimulation occurs in response to the first pacing pulse output;adjusting the stimulation pulse by a first step to a second pacing pulse output in response to detecting the phrenic nerve stimulation;detecting from the cardiac capture sensor signal whether cardiac capture occurs in response to the second pacing pulse output; andadjusting the stimulation pulse output by a second step to a third pacing pulse output in response to detecting cardiac capture, the second step being less than the first step.