title: Electrocardiographic characteristics of four anuran amphibia.
mesh_terms: D000663:Amphibians / Q000502:physiology*; D000818:Animals; D001835:Body Weight; D002024:Bufo marinus; D002025:Bufonidae; D004562:Electrocardiography; D006321:Heart / Q000502:physiology*; D012104:Reptiles; D013045:Species Specificity; D013997:Time Factors