Patent ID: 7561914

Claim:
A method of bi-ventricular pacing therapy, comprising: delivering at least one pacing stimulus to a first ventricle via a least one pace/sense electrode disposed in electrical communication with said first ventricle; delivering at least one pacing stimulus to a second ventricle via a least one pace/sense electrode disposed in electrical communication with said second ventricle; wherein the pacing stimuli are delivered at approximately the same time; and in the event that a depolarization wavefront of the first ventricle is sensed in a first interval extending to between about 25 ms and about 55 ms after delivery of the pacing stimulus to the first ventricle, declaring capture of said first ventricle; in the event that a depolarization wavefront is detected by the pace/sense electrode of the first ventricle within a second interval following the first interval, following pacing delivery, then declaring loss-of-capture (LOC) of said first ventricle; and in the event that a depolarization wavefront is detected by the pace/sense electrodes of the second ventricle within a second interval following the first interval, following pacing delivery, then declaring loss-of-capture (LOC) of said second ventricle.