Patent ID: 8116866

Claim:
A method for operating a cardiac rhythm management device in a patient, comprising: delivering paces to both right and left ventricles in accordance with a programmed biventricular pacing mode, such that the paces are delivered at a programmed biventricular offset interval and after a programmed AV delay interval with respect to an atrial event; switching to a single ventricle pacing mode and recording an evoked response test electrogram during a single ventricle pace with the programmed AV delay interval; comparing the test electrogram to an evoked response template electrogram previously recorded during single ventricle pacing when the programmed AV delay interval was known to be matched to the patient's then existing intrinsic AV interval; adjusting the programmed AV delay interval to match the patient's current intrinsic AV interval based upon the comparison of the test and template electrograms; returning to the biventricular pacing mode with the adjusted AV delay interval.