Patent ID: 6115632
Filing Date: 2000-09-05
Classification: A61N

Abstract:
A dual chamber pulse generator for sensing atrial and ventricular activity of a heart and providing pacing pulses to at least a ventricle of the heart, the pulse generator comprising;a first detector associated with an atrium of the heart for detecting atrial activations of the heart;a second detector associated with a ventricle of the heart for detecting ventricular activations of the heart;an output for applying pacing pulses to the ventricle in timed relation to atrial activations of the heart;a timer to time an atrial refractory period responsive to each ventricular activation of the heart, the timer timing atrial refractory periods of a first duration and atrial refractory periods of a second duration longer than the first duration; andmeans for causing the timer to periodically time an atrial refractory period of the second duration.