Treatment for disorders by parasympathetic stimulation

A treatment method, comprising:

• determining that a subject suffers from renal failure;
• designating the subject for treatment of the renal failure, responsively to the determination;
• and
• improving renal function of the subject by applying an electrical current to a parasympathetic site of the subject selected from the group consisting of:
• a vagus nerve of the subject, an epicardial fat pad of the subject, a pulmonary vein of the subject, a carotid artery of the subject, a carotid sinus of the subject, a coronary sinus of the subject, a vena cava vein of the subject, a jugular vein of the subject, a right ventricle the subject, a parasympathetic ganglion of the subject, and a parasympathetic nerve of the subject,
• wherein the method further comprises receiving a signal from the subject signifying that the subject is undergoing dialysis, and wherein applying the current comprises applying the current responsively to the received signal.