Patent ID: 8649865

Claim:
A method of selecting a pacing site or a combination of pacing sites at which to deliver cardiac stimulation to a patient, the method comprising: (a) for each of a plurality of pacing sites and/or combinations of pacing sites within the patient (a.1) using the pacing site or the combination of pacing sites to deliver cardiac stimulation; (a.2) obtaining a signal indicative of electrical activity of the patient's heart while the pacing site or the combination of pacing sites is being used to deliver cardiac stimulation; (a.3) obtaining a plethysmograph signal indicative of changes in arterial blood volume while the pacing site or the combination of pacing sites is being used to deliver cardiac stimulation; and (a.4) determining a time delay between a predetermined feature of the signal indicative of electrical activity and a predetermined feature of the plethysmograph signal indicative of changes in arterial blood volume; and (b) selecting a pacing site or a combination of pacing sites from the plurality of pacing sites and/or combinations of pacing sites based on the time delays.