Patent ID: 8509890

Claim:
A method for use with an implantable system including a lead having multiple electrodes implantable in a patient's left ventricular (LV) chamber, the method comprising: (a) pacing first and second sites within the LV chamber using a programmed LV1-LV2 delay, wherein the LV1-LV2 delay is a programmed delay between when first and second pacing pulses are to be delivered respectively at the first and second sites within the LV chamber; (b) monitoring for evoked responses to the first and second pacing pulses; and (c) adjusting one or more LV pacing parameter and/or delivering one or more backup pulse based on results of step (b), wherein: step (b) includes determining whether global capture is achieved; and step (c) includes making at least one of the following adjustments if global capture is not achieved: (c.1) increasing a pacing pulse energy associated with at least one of the first and second pacing pulses; (c.2) adjusting the LV1-LV2 delay; and (c.3) using an additional pacing vector to pace an additional site within the LV chamber, in addition to the first and second sites within the LV chamber.