Patent ID: 7369891
Filing Date: 2008-05-06
Classification: A61N

Abstract:
1. An implantable pulse generator system comprising an implantable pulse generator device and one or more implantable leads coupled to the implantable pulse generator device to position one or more electrodes within a patient, the system including: output circuitry to deliver therapeutic pulses to the patient via the electrodes; a timing unit to request the delivery of therapeutic pulses by the output circuitry upon expiration of escape intervals; a timing control unit to provide determine and control the escape intervals to provide a pacing rate and to provide for a maximum pacing rate; a rate control unit to define first and second rate control time intervals relative to a first stimulation pulse delivered to the patient in a first cardiac chamber at the pacing rate determined by the timing control unit and wherein a timing of the first stimulation pulse is applied to the timing control unit in controlling in the pacing rate, the first time interval being shorter than the second time interval, wherein the rate control unit allows delivery of a second stimulation pulse to the first cardiac chamber without applying the timing of the second stimulation pulse to the timing control unit to control the pacing rate when the second stimulation pulse is requested to be delivered at a time during the first time interval, disallows delivery of the second stimulation pulse to the first cardiac chamber when the second stimulation pulse is requested to be delivered at a time following the first time interval during the second time interval, and allows delivery of the second stimulation pulse to the first cardiac chamber when the second stimulation pulse is requested to be delivered at a time subsequent to the second time interval.