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IMPLANTABLE MEDICAL DEVICE FOR IDENTIFYING AND MANAGING INTRINSIC REENTRANT TACHYCARDIA

  • US 20090005828A1
  • Filed: 06/23/2008
  • Published: 01/01/2009
  • Est. Priority Date: 06/27/2007
  • Status: Active Grant
First Claim
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1. An implantable medical device, comprising:

  • a pulse generator configured to provide atrial and ventricular pacing pulses on demand, the pulse generator timing delivery of the ventricular pacing pulses based on an AV pacing interval;

    an AV hysteresis module that extends an AV interval from a base AV interval to an extended AV interval to promote intrinsic heart activity;

    a refractory module that establishes a PVARP interval equal to a base PVARP interval following at least one of the ventricular pacing pulses, the refractory module lengthening the PVARP interval by adding a PVARP extension to the base PVARP interval to provide an extended PVARP interval; and

    a reentrant conduction detector identifying an intrinsic reentrant tachycardia based, in part, on a retrograde P wave occurring during the PVARP extension of the extended PVARP interval.

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