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IMPLANTABLE TISSUE PERFUSION SENSING SYSTEM AND METHOD

  • US 20080208067A1
  • Filed: 02/28/2008
  • Published: 08/28/2008
  • Est. Priority Date: 02/28/2007
  • Status: Active Grant
First Claim
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1. A medical device for sensing cardiac events, comprising:

  • a plurality of electrodes sensing cardiac signals utilized to identify a cardiac event;

    a plurality of light sources capable of emitting light at a plurality of wavelengths;

    a detector to detect the emitted light; and

    a processor to determine a plurality of light measurements in response to the emitted light detected by the detector, to determine a blood volume index in response to determined light measurements of the plurality of light measurements from a light source of the plurality of light sources emitting light at an isobestic wavelength, and to verify the identifying of the cardiac event in response to the determined blood volume index.

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