Patent ID: 8090444

Claim:
A method comprising: delivering stimulation energy via a right ventricular site; sensing an evoked response caused by the delivered stimulation energy at the right ventricular site; calculating a paced propagation delay for the right ventricular site (PPD RV ) wherein the paced propagation delay comprises a time interval between delivery of the stimulation to the right ventricular site and a feature of the corresponding sensed right ventricular evoked response; delivering stimulation energy via a left ventricular site; sensing an evoked response caused by the delivered stimulation energy at the left ventricular site; calculating a paced propagation delay for the left ventricular site (PPD LV ) wherein the paced propagation delay comprises a time interval between delivery of the stimulation to the left ventricular site and a feature of the corresponding sensed left ventricular evoked response; determining an interventricular delay time (VV) for delivery of a bi-ventricular pacing therapy based in part on the paced propagation delay for the right ventricular site (PPD RV ) and the paced propagation delay for the left ventricular site (PPD LV ); and calculating a time difference between the paced propagation delay for the right ventricular site and the paced propagation delay for the left ventricular site (ΔPPD) and using this time difference as an estimate for a time difference (Δ IVCD ) between an interventricular conduction delay from the left ventricle to the right ventricle (IVCD-LR) and an interventricular conduction delay from the right ventricle to the left ventricle (IVCD-RL).