A method for treating at least one of a plurality of disorders characterized at least in part by vagal activity includes positioning an electrode at a body organ innervated by the vagus. An electrical signal is applied to the electrode to modulate vagal activity. The electrical signal is applied at a frequency in excess of 3,000 Hz for the signal to create a neural conduction block to the vagus with the neural conduction block selected to at least partially block nerve impulses on the vagus.