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System and method for distinguishing among cardiac ischemia, hypoglycemia and hyperglycemia using an implantable medical device

  • US 7,297,114 B2
  • Filed: 01/25/2005
  • Issued: 11/20/2007
  • Est. Priority Date: 01/25/2005
  • Status: Active Grant
First Claim
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1. A method for use with an implantable medical device for detecting hyperglycemia in a patient in which the device is implanted, the method comprising:

  • tracking repolarization peak-based intervals representative of intervals between depolarization events and peaks of corresponding repolarization events within electrical cardiac signals;

    tracking repolarization end-based intervals representative of intervals between depolarization events and ends of corresponding repolarization events within electrical cardiac signals;

    tracking elevations of segments of the cardiac signals between depolarization events and corresponding repolarization events; and

    detecting an episode of hyperglycemia based on a change in the elevations of the segments in combination with a lack of change in the repolarization peak-based intervals and the repolarization end-based intervals.

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