Patent ID: 8688234

Claim:
An apparatus comprising: a pacing output circuit configured to generate a ventricular pacing signal to deliver to an electrode near the His bundle in a right ventricle of a heart to pace the right and left ventricles and improve synchronization of at least one of the ventricles relative to intrinsic activity, the pacing output circuit comprising: a first terminal, configured to deliver a first signal component; a second terminal, configured to deliver a second signal component; a third terminal, configured to deliver a reference signal component; and wherein the first and second signal components are provided in opposite polarity from each other with respect to the reference signal component, wherein the pacing output circuit is configured to recurrently reverse polarity of the first and second signal components from a first polarity arrangement to a second polarity arrangement, wherein the polarity of the first and second signal components is reversed from the first polarity arrangement to the second polarity arrangement after N beats or time corresponding to the N beats, wherein the polarity of the first and second signal components is reversed again from the second polarity arrangement to the first polarity arrangement after M beats or time corresponding to the M beats, and wherein N is greater than M.