Cases of auriculoventricular dissociation in children that have been studied and described are summarized in the accompanying table. The case to be described in the present paper is also included. It would seem from the relatively small number of cases that a search of the literature has revealed that this condition is either much less common or is more frequently overlooked in children than in adults. The diagnosis in Cases 1, 2, 3, 4, 11 and 16 was made by the ordinary methods of physical examination or inferred from the history of slow pulse and syncopal attacks. It must be accepted, therefore, with a certain amount of reservation. In the other cases, the condition was definitely constituted by either jugular pulse tracings or electrocardiographic records. Probably the first case reported was that by Schuster, which the author states was one of bradycardia of unknown nature following acute rheumatic fever. Attacks