title: ECG of the month.
authors.affiliation: Department of Clinical Studies, School of Veterinary Medicine, University of Pennsylvania, Kennett Square 19348.
authors.forename: A D
authors.initials: AD
authors.lastname: Maxson
authors.forename: V B
authors.initials: VB
authors.lastname: Reef
mesh_terms: D000818:Animals; D001145:Arrhythmias, Cardiac / Q000503:physiopathology / Q000662:veterinary*; D004562:Electrocardiography / Q000662:veterinary*; D006339:Heart Rate; D006734:Horse Diseases / Q000175:diagnosis / Q000503:physiopathology*; D006736:Horses; D008297:Male; D009205:Myocarditis / Q000175:diagnosis / Q000662:veterinary*