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Dual sensing for brady-tachy pacemaker/ICD

  • US 7,650,182 B2
  • Filed: 07/08/2005
  • Issued: 01/19/2010
  • Est. Priority Date: 07/08/2005
  • Status: Expired due to Fees
First Claim
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1. A system comprising:

  • a primary cardiac signal sensing circuit operable to sense at least a first intrinsic cardiac signal, wherein the primary cardiac signal sensing circuit is configured to be coupled to a first and a second implantable electrode and has a first signal sensing sensitivity configured to detect bradycardia and a second higher sensitivity to simultaneously detect tachyarrhythmia;

    at least one secondary cardiac signal sensing circuit operable to sense at least a second intrinsic cardiac signal, wherein the secondary cardiac signal sensing circuit is configured to be coupled to at least a third implantable electrode different from the first and second electrode, has a higher signal sensing sensitivity than the primary sensing circuit, and is configured to detect ventricular tachycardia; and

    a controller circuit, coupled to the primary and secondary cardiac signal sensing circuits, the controller circuit operable to;

    detect tachyarrhythmia and bradycardia using the primary sensing circuit;

    detect tachyarrhythmia using the secondary sensing circuit; and

    deem the tachyarrhythmia valid if the controller circuit detects the tachyarrhythmia using both the primary and secondary sensing circuits.

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