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System and method of classifying tachyarrhythmia episodes as associated or disassociated

  • US 20020198461A1
  • Filed: 08/02/2002
  • Published: 12/26/2002
  • Est. Priority Date: 12/01/1999
  • Status: Active Grant
First Claim
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1. A system, comprising:

  • control circuitry where the control circuitry receives a first cardiac signal and a second cardiac signal sensed during a cardiac episode, where the first cardiac signal includes indications of depolarizations in a first cardiac area and the second cardiac signal includes indications of depolarizations in a second cardiac area, the control circuitry including;

    a first depolarization detector circuit to detect occurrence of primary depolarizations in the first cardiac signal;

    a second depolarization detector circuit to detect occurrence of auxiliary depolarizations in the second cardiac signal;

    a cardiac depolarization counting circuit coupled to the first depolarization detector circuit and the second depolarization detector circuit, where the cardiac depolarization counting circuit counts a first number (K) of auxiliary depolarizations occurring during a first portion of a first time interval surrounding each of one or more primary depolarizations of the primary depolarizations; and

    a microprocessor coupled to the cardiac depolarization counting circuit, where the microprocessor determines whether the primary depolarizations and the auxiliary depolarizations in the cardiac episode are associated or disassociated based on K.

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