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System and method for detecting cardiac ischemia based on T-waves using an implantable medical device

  • US 7,225,015 B1
  • Filed: 06/24/2003
  • Issued: 05/29/2007
  • Est. Priority Date: 06/24/2003
  • Status: Active Grant
First Claim
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1. In an implantable medical device for implant within a patient, a method comprising:

  • detecting a plurality of individual T-waves within cardiac signals;

    determining an energy value for each of the plurality of individual T-waves;

    calculating a plurality of slopes for each of the plurality of individual T-waves;

    for each of the plurality of individual T-waves, determining the maximum slope from the plurality of slopes and comparing the maximum slope to a threshold maximum slope and the energy value to a threshold energy value; and

    for each of the plurality of individual T-waves, detecting cardiac ischemia when the energy value and the maximum slope of the T-wave exceeds its respective threshold.

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