Patent ID: 8768465

Claim:
A method of cardiac pacing employing a right ventricular electrode and a plurality of left ventricular electrodes, comprising: a) pacing using the right ventricular electrode and measuring activation times at a plurality of the left ventricular electrodes; b) pacing using the right ventricular electrode and a first one of the left ventricular electrodes and measuring activation times at other ones of the left ventricular electrodes; c) computing a first electrical dyssynchrony (ED 1 ) based on activation times in step b); d) pacing using the right ventricular electrode and a second one of the left ventricular electrodes and measuring activation times at other ones of the left ventricular electrodes; e) computing a second electrical dyssynchrony (ED 2 ) based on the activation times in step d); f) determining whether a difference between ED 1 and ED 2 is less than a predetermined threshold; and g) eliminating one of the left ventricular electrodes for delivery of subsequent pacing pulses if the difference between ED 1 and ED 2 is greater than a predetermined threshold, wherein ED 1 and ED 2 are each determined from one of a set of equations comprising: ED(1)=AT(1)+AT(2)+AT(3)/2+AT(4)/3; ED(2)=AT(1)+AT(2)+AT(3)+AT(4)/2; ED(3)=AT(1)/2+AT(2)+AT(3)+AT(4)/2; and ED(4)=AT(1)/3+AT(2)/2+AT(3)+AT(4).