Patent ID: 7013176

Claim:
A cardiac rhythm management device, comprising: an atrial sensing channel for generating electrogram signals corresponding to electrical activity in an atrium; right and left ventricular sensing channels for generating electrogram signals corresponding to electrical activity in the right and left ventricles, respectively; right and left ventricular pacing channels for delivering pacing pulses to the right and left ventricles, respectively; a controller for controlling the output of pacing pulses and interpreting electrogram signals, wherein the controller is programmed to pace at least one ventricle within a programmable atrio-ventricular delay (AVD) interval after an atrial sense in an atrial-tracking mode; wherein the controller is programmed to include instructions to perform: measure at least one intrinsic atrio-ventricular delay interval and a duration of ventricular depolarization from electrogram signals during an intrinsic beat; and set the AVD interval according to a formula which includes a linear combination of the measured intrinsic atrio-ventricular delay and the measured duration of ventricular depolarization defined by specified coefficients.