Atrial activation paths and P waves in horses.
D000818:Animals; D016275:Atrial Function; D004562:Electrocardiography / Q000662:veterinary; D006329:Heart Conduction System / Q000502:physiology*; D006736:Horses / Q000502:physiology*; D010496:Pericardium / Q000502:physiology; D012849:Sinoatrial Node / Q000502:physiology; D013997:Time Factors