A processing system based on the probes of the vagus nerves comprises the following elements: - a unit for detection and control (20) - at least one probe (10g, 10d) connected to the unit for detection and control and intended to be applied to at least one of the vagus nerves of a patient, - of the means (24) provided in the unit for detection and control in order to detect a phenomenon of solid discharge of the potentials of action in at least one of the vagus with the aid of a detection probe, - of the means (24) provided in the unit for detection and control and capable, in response to the detection of a solid, to be applied to the pacing (10g, 10d) of the signals capable of causing depolarisation and / or hyperpolarization of the vagus nerves and to lock the conduction of the potentials of action at least in the direction of efferent. Application to the prevention of the risks of sudden death in the case of attack in patients with epilepsy.