Patent ID: 6665564
Filing Date: 2003-12-16
Classification: A61N

Abstract:
A system, including:an atrial module selected from the group consisting essentially of an atrial stimulation module and an atrial sensing module, the atrial module providing times associated with atrial depolarizations; a ventricular stimulation module; a mitral valve closure detector providing times associated with mitral valve closures; and an atrioventricular (A-V) timing module, coupled to the atrial module and the ventricular stimulation module, for controlling the delivery of ventricular stimulations at different A-V delays, the A-V timing module including: a timer, coupled to the mitral valve closure detector for receiving the times associated with mitral valve closures corresponding to the ventricular stimulations at the different A-V delays, and coupled to the atrial module for receiving the times associated with the atrial depolarizations, the timer calculating, for each of the ventricular stimulations at the different A-V delays, a time interval between the preceding atrial depolarization and a next mitral valve closure following that ventricular stimulation; a slope calculation module, coupled to the timer and calculating the slopes of the time intervals against the different A-V delays; and an A-V delay selection module, coupled to the timer and selecting one of the different A-V delays based on the time intervals obtained corresponding to the ventricular stimulations at the different A-V delays, and in which the A-V delay selection module is coupled to the slope calculation module to select an A-V delay based on the slopes of the time intervals.