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Method and apparatus for identifying lead-related conditions using prediction and detection criteria

  • US 7,369,893 B2
  • Filed: 04/27/2005
  • Issued: 05/06/2008
  • Est. Priority Date: 12/01/2004
  • Status: Active Grant
First Claim
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1. A method for delivering therapy in a medical device, comprising:

  • determining, prior to detection of a cardiac event requiring the delivered therapy, the presence of a lead-related condition;

    determining, in response to a lead-related condition being present, the presence of oversensing; and

    controlling delivery of therapy in response to the lead-related condition and oversensing being present, wherein determining the presence of a lead-related condition comprises;

    determining whether a first oversensing criteria is satisfied;

    determining whether a second oversensing criteria is satisfied;

    determining whether an impedance criteria has been satisfied; and

    generating an alert in response to more than one of the first oversensing criteria, the second oversensing criteria and the impedance criteria being satisfied, wherein determining whether a first oversensing criteria is satisfied comprises;

    determining whether a predetermined number of RR-intervals are within a first predetermined time period subsequent to a blanking period associated with a sensing device; and

    determining whether the predetermined number of RR-intervals occur within a second predetermined time period.

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