Patent ID: 7890172

Claim:
A method, implementable at least in part in a cardiac therapy device, for delivering cardiac resynchronization therapy to a patient, the method comprising: sensing cardiac electrical signals from a plurality of different left ventricular electrode sites; measuring, for each left ventricular electrode site, a timing interval between first and second cardiac electrical signal features associated with left ventricular depolarization, the timing interval associated with a degree of responsiveness of each left ventricular electrode site to cardiac resynchronization therapy (CRT); comparing at least some of the timing intervals of different left ventricular electrode sites to one another; and determining a pacing output configuration that provides improved patient responsiveness to CRT based on the comparison of the timing interval measurements, wherein determining the pacing output configuration comprises selecting at least one left ventricular electrode site from the plurality of left ventricular electrode sites based on the timing interval measurements, wherein comparing and determining are implemented at least in part by circuitry of a device.