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Respiration sensor processing for phrenic nerve activation detection

  • US 8,626,292 B2
  • Filed: 05/26/2010
  • Issued: 01/07/2014
  • Est. Priority Date: 05/27/2009
  • Status: Active Grant
First Claim
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1. An implantable medical device, comprising:

  • a pulse generator configured to deliver cardiac pacing to a heart;

    a single impedance sensor configured to generate a signal modulated by patient respiration, the sensor signal available at a sensor output terminal;

    a first filter channel coupled to the sensor output terminal, the first filter channel configured to attenuate first frequencies of the sensor signal to produce a first filtered output;

    a second filter channel, separate from the first filter channel, coupled to the same sensor output terminal, the second filter channel configured to attenuate second frequencies of the sensor signal to produce a second filtered output; and

    circuitry configured to evaluate patient respiration using the first filtered output and to detect phrenic nerve activation caused by cardiac pacing using the second filtered output.

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