US Patent 8688234 Devices, methods, and systems including cardiac pacing

A pacing output circuit can be configured to generate a ventricular pacing signal configured to be delivered 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. In an example, the ventricular pacing signal can include first and second signal components in opposite polarity from each other with respect to a reference component, the first and second signal components having substantially identical duration and magnitude.