1. A non-transitory machine-readable medium including instructions, which when executed by a machine, cause the machine to provide therapy using implanted electrodes to a patient having a medical condition, including deliver electrical stimulation energy as a pulsed electrical waveform to a spinal cord of the patient in accordance with a stimulation program that preferentially stimulates dorsal horn neuronal elements over dorsal column neuronal elements in the spinal cord, including generate a first electrical field having a first orientation during at least a first pulse in the pulsed electrical waveform, generate a second electrical field having a second orientation during at least a second pulse in the pulsed electrical waveform, and generate a third electrical field having a third orientation during at least a third pulse in the pulsed electrical waveform the first, second and third orientations being different from each other.