title: ECG of the month. Sinus arrhythmia with first-degree atrioventricular block.
authors.affiliation: Section of Cardiology, Department of Small Animal Clinical Sciences, College of Veterinary Medicine, University of Florida, Gainesville, FL 32610-0126, USA.
authors.forename: Mandi K
authors.initials: MK
authors.lastname: Schmidt
authors.forename: Amara H
authors.initials: AH
authors.lastname: Estrada
authors.forename: Meg M
authors.initials: MM
authors.lastname: Sleeper
mesh_terms: D000824:Animal Nutritional Physiological Phenomena / Q000502:physiology*; D000818:Animals; D001146:Arrhythmia, Sinus / Q000175:diagnosis / Q000209:etiology / Q000628:therapy / Q000662:veterinary*; D004184:Dirofilariasis / Q000188:drug therapy / Q000503:physiopathology; D004283:Dog Diseases / Q000175:diagnosis* / Q000209:etiology / Q000628:therapy; D004285:Dogs; D004562:Electrocardiography / Q000379:methods / Q000662:veterinary*; D006327:Heart Block / Q000175:diagnosis / Q000209:etiology / Q000628:therapy / Q000662:veterinary*; D008297:Male; D044342:Malnutrition / Q000503:physiopathology / Q000628:therapy / Q000662:veterinary*; D016896:Treatment Outcome