title: [STUDIES ON THE DEGREE OF DAILY VARIATIONS IN THE ECG OF HEALTHY EXPERIMENTAL SUBJECTS].
mesh_terms: D004562:Electrocardiography; D006339:Heart Rate; D006801:Humans; D010507:Periodicity; D010827:Physiology
keywords: ELECTROCARDIOGRAPHY; HEART RATE; PERIODICITY; PHYSIOLOGY
vernacular_title: UNTERSUCHUNGEN UEBER DAS AUSMASS VON TAGESSCHWANKUNGEN IM EKG GESUNDER VERSUCHSPERSONEN.