A method for delivering physiological pacing includes selecting an
electrode implant site within an interventricular septal zone, which is
in proximity to the bundle of His where pacing stimulation results in a
rhythm breaking out at an intrinsic location, and wherein a ratio of
sensed P-wave amplitude to sensed R-wave amplitude is less than
approximately 0.5 and a pacing threshold is less than or equal to
approximately 1.5 volts.