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IMPLANTABLE HEART SOUND SENSOR WITH NOISE CANCELLATION

  • US 20090030334A1
  • Filed: 07/23/2007
  • Published: 01/29/2009
  • Est. Priority Date: 07/23/2007
  • Status: Active Grant
First Claim
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1. An implantable medical device system, comprising:

  • a first acoustical sensor adapted to be operatively positioned in a first internal body location to have a first level of responsiveness for sensing heart sounds in a patient, and to generate a first signal responsive to the sensed heart sounds;

    a second acoustical sensor adapted to be operatively positioned in a second internal body location to have a second level of responsiveness for sensing heart sounds in the patient less than the first level of responsiveness, and to generate a second signal responsive to the heart sounds; and

    an implantable medical device comprising a housing and a processor enclosed in the housing, the processor configured to receive the first signal and the second signal and generate a corrected first signal by canceling non-cardiac signals in the first signal using the second signal.

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