1. A system, comprising: an implantable neurostimulator configured to deliver neural stimulation to a vagus nerve in a cervical region to non-selectively stimulate both afferent and efferent axons in the vagus nerve, wherein the implantable neurostimulator includes: a memory configured to store programmable parameters to control a programmed intensity and programmed schedule of the delivered neural stimulation, wherein the programmable parameters control intermittent and periodic electrical pulses according to the programmed schedule; the pulse generator configured to therapeutically deliver the scheduled neural stimulation to the vagus nerve independent of cardiac cycle through electrodes via an electrically coupled nerve lead; a heart rate sensor configured to sense heart rate; and a controller configured to respond to the sensed heart rate by titrating delivery of the scheduled neural stimulation.