Patent ID: 7904151

Claim:
Apparatus comprising: an electrode device, configured to be coupled to a site of a subject selected from the group consisting of: a vagus nerve, an epicardial fat pad, a pulmonary vein, a carotid artery, a carotid sinus, a coronary sinus, a vena cava vein, a right ventricle, and a jugular vein; a sensing element, configured to sense a physiological parameter of a heart of the subject; an implantable device configured to apply anti-arrhythmic therapy to the heart, selected from the group consisting of: rapid pacing, defibrillation, and cardioversion; and a control unit, configured to: drive the electrode device to apply to the site a current that increases parasympathetic tone of the subject, detect fast ventricular tachycardia (VT) responsively to the sensed physiological parameter, responsively to the detection of the fast VT, modify at least one current parameter of the applied current, and continue to apply the current using the new parameter, after continuing to apply the current using the new parameter, determine whether the fast VT has been resolved, responsively to a determination that the fast VT has not been resolved, determine whether to drive the implantable device to apply the anti-arrhythmic therapy to the heart, responsively to an affirmative determination to drive the implantable device, drive the implantable device to apply the anti-arrhythmic therapy to the heart, and responsively to a determination not to drive the implantable device, modify one or more current parameters of the applied current.