Patent ID: 7809440
Filing Date: 2010-10-05
Classification: A61B,A61N

Abstract:
1. A pacing system comprising: an implantable pulse generator, an atrial lead coupled to the implantable pulse generator having at least one active atrial pace/sense electrode adapted to be disposed in operative relation to an atrial heart chamber, at least one indifferent atrial pace/sense electrode adapted to be implanted in the patient's body, a ventricular lead coupled to the implantable pulse generator having at least one active ventricular pace/sense electrode adapted to be disposed in operative relation to a ventricular heart chamber, and an indifferent ventricular pace/sense electrode adapted to be implanted in the patient's body; means for generating atrial pace (A-PACE) pulses; means for sensing a natural ventricular depolarization; means for producing a V-EVENT signal upon sensing a natural ventricular depolarization; means for generating ventricular pace (V-PACE) pulses; V-A interval timing means for timing out a V-A interval following generation of a V-PACE pulse and following sensing of a V-EVENT; means for triggering said atrial pace generating means to generate an A-PACE pulse following expiration of the V-A interval; means for timing out a PAV interval upon triggering of said atrial pace generating means; means for timing a ventricular blanking period following generation of an atrial pace pulse (A-PACE); means for inhibiting said V-EVENT signal producing means during the ventricular blanking period following generation of an atrial pace pulse (A-PACE); a PVC sense electrode pair spatially separated from the ventricular pace/sense electrodes; sensing means coupled to the PVC sense electrode pair for generating a signal indicating occurrence of a PVC, as a PVC declaration signal, by sensing of a depolarization of the ventricles occurring during the ventricular blanking period; and means responsive to the generation of a PVC declaration signal for terminating the PAV delay and triggering the V-A interval timing means to time out the V-A interval.