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Methods and devices for accurately classifying cardiac activity

  • US 9,339,662 B2
  • Filed: 10/18/2013
  • Issued: 05/17/2016
  • Est. Priority Date: 03/07/2008
  • Status: Active Grant
First Claim
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1. A method of cardiac signal analysis in an implantable medical device (IMD), the IMD including a number of implantable electrodes and operational circuitry coupled to the implantable electrodes for performing the method of cardiac signal analysis, the method comprising:

  • a) the operational circuitry detecting events in a signal;

    b) the operational circuitry determining which detected events to certify for use in rhythm identification by;

    i) applying interval analysis on a set of detected events in order to identify overdetected events such that, if a likely overdetection is identified, the likely overdetection is not certified;

    ii) applying analysis to identify overdetected events using interval and shape characteristics of pairs of consecutive events such that, if a likely overdetection is identified, the likely overdetection is not certified; and

    iii) certifying at least some detected events of the set of detected events; and

    c) the operational circuitry determining whether a malignant cardiac rhythm is occurring using only the certified detected events.

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