Patent ID: 8391977

Claim:
A method comprising: delivering a cardiac pacing therapy that comprises an atrio-ventricular delay (AV or PV) and an interventricular delay (VV); disabling ventricular pacing; acquire R RV and R LV ; if R RV occurs prior to R LV in a cardiac cycle then acquiring a R RV −R RV interval, acquiring a R LV −R RV interval, and determining an interventricular delay (Δ Sur ) based on the acquired R RV −R RV interval and R LV −R RV interval; or if R LV occurs prior to R RV in a cardiac cycle then acquiring a R LV −R LV interval, acquiring a R RV −R LV interval, and determining an interventricular delay (Δ Sur ) based on the acquired R LV −R LV interval and R RV −R LV interval; and determine one or more cardiac pacing therapy parameters based at least in part on the intraventricular delay (Δ Sur ) in order to optimize pacing therapy based on the determined one or more cardiac pacing therapy parameters.