Patent ID: 8041426

Claim:
A system comprising: a sensing circuit configured to: (1) detect at least one of a sensed or paced atrial event; and (2) detect a sensed ventricular event; and a controller or programmer circuit, configured to be communicatively coupled to the sensing circuit, the controller or programmer circuit configured to: (1) determine a measured atrioventricular delay (AVD) concluded by the sensed ventricular event; (2) determine a measured interatrial delay (IAD) concluded by the sensed atrial event; (3) determine a first atrioventricular delay value, AVD 1 , selected to approximately maximize contractility of a ventricle, using the measured AVD concluded by the sensed ventricular event; and (4) determine a second atrioventricular delay value, AVD 2 , selected to approximately maximize stroke volume of the ventricle, using the measured IAD concluded by the sensed atrial event, wherein the controller or programmer circuit is configured to use a blended atrioventricular delay (AVD blended ) that is determined using a user-modifiable function of both AVD 1 and AVD 2 , wherein the AVD blended is determined as an individually-scaled sum of AVD 1 and AVD 2 .