Patent ID: 8880160

Claim:
A system comprising: a cardiac signal sensing circuit connectable to a first cardiac lead configured for use in a ventricle, the cardiac signal sensing circuit configured to: sense a first cardiac signal segment that includes a QRS complex; and sense a second cardiac signal segment that includes a local activation fiducial indicative of a cardiac depolarization wavefront arriving at or near one or more electrodes of the first cardiac lead; and a processor circuit communicatively coupled to the cardiac signal sensing circuit, wherein the processor circuit includes a site activation timer circuit configured to determine a time duration between a fiducial of the QRS complex of the first cardiac signal segment and the local activation fiducial of the second cardiac signal segment, and wherein the processor circuit is configured to: generate, using the determined time duration, an indication of optimality of placement of the one or more electrodes of the first cardiac lead for delivering therapy; and provide the indication to a cas one of a user or process.