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System for detection of different types of cardiac events

  • US 8,630,702 B2
  • Filed: 11/09/2006
  • Issued: 01/14/2014
  • Est. Priority Date: 09/20/2002
  • Status: Active Grant
First Claim
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1. A cardiac event detection system for detecting an acute ischemia related cardiac event in a patient comprising:

  • (a) at least two electrodes for sensing an electrogram electrical signal from said patient'"'"'s heart, at least one of the electrodes being adapted for implantation into the heart;

    (b) an implantable device coupled to said electrodes, said implantable device having an analog-to-digital circuit system contained therein for digitizing said electrogram electrical signal, thereby generating a digitized electrogram;

    (c) a processor contained in said implantable device and electrically coupled to said electrodes, said processor including means for detecting ST-segment shifted beats within the digitized electrogram and for computing the heart rate associated with various portions of the digitized electrogram, the processor further including means for detecting a cardiac event based upon both the number of ST-segment shifted beats within a set time period and the heart rate within said set time period such that the number of ST-segment shifted beats required to detect acute ischemia is greater at heart rates above a patient'"'"'s normal or resting heart rate.

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