Patent ID: 6144880
Filing Date: 2000-11-07
Classification: A61N,E21B

Abstract:
A method, comprising:measuring an interval during a nonpaced systolic cycle between a first event and a second event, the first event related to an atrial contraction which is in a first predictable time-dependent relationship and the second event which is in a second predictable time-dependent relationship to a ventricular pacing signal optimally timed for maximum peak positive LV pressure change during systole, (LV+dp/dt);generating an atrio-ventricular delay (AVD.sub.c) calculated from a predetermined mapping of a relationship of the interval to an optimal atrio-ventricular delay for maximum peak positive LV pressure change during systole, (LV+dp/dt); anddelivering a pacing pulse to a ventricle with the generated atrio-ventricular delay (AVD.sub.c);wherein AVD.sub.c provides an approximation of the optimal atrio-ventricular delay for pacing the ventricle to provide maximum peak positive LV pressure change during systole, (LVA+dp/dt).