Anorexia nervosa is a disorder characterized by excessive dieting, a morbid fear of becoming obese, a distorted body image and amenorrhea in women. The condition is seen chiefly in girls and young women but also occurs in men. Death in anorexia nervosa may be sudden, and the mortality rate is the highest of any psychiatric disease. Despite investigations of its endocrine and psychiatric manifestations, little has been written about cardiac conduction in this entity. We report a patient with anorexia nervosa who presented with syncope due to a sinus bradycardia. His bundle electrograms were performed during the course of her hospitalization, and revealed that the abnormalities were reversible with food intake.