title: Ambulatory electrocardiography in dogs.
abstract: Twenty-four hour ambulatory electrocardiographic recording using a Medilog tape recorder was attempted in 16 healthy pet dogs weighing between 18.4 and 34 kg, while they were living in familiar surroundings. Full 24-hour records were obtained from 10 of them and recordings of more than 10 hours duration from two others; and the findings in these recordings were similar. Maximum heart rates ranged between 110 and 300 beats/minute and the minimum rates ranged between 17 and 46 beats/minute. Intermittent ventricular premature complexes were recorded from these apparently healthy dogs and all but one dog demonstrated a sinus pause, longer than two seconds; the longest pause was 5.7 seconds. The pauses were associated with marked sinus arrhythmia and occurred in both brachycephalic and non-brachycephalic breeds.
authors.affiliation: Department of Clinical Veterinary Medicine, Cambridge.
authors.forename: L W
authors.initials: LW
authors.lastname: Hall
authors.forename: J K
authors.initials: JK
authors.lastname: Dunn
authors.forename: M
authors.initials: M
authors.lastname: Delaney
authors.forename: L M
authors.initials: LM
authors.lastname: Shapiro
mesh_terms: D000818:Animals; D004283:Dog Diseases / Q000503:physiopathology; D004285:Dogs / Q000502:physiology*; D015716:Electrocardiography, Ambulatory / Q000379:methods / Q000662:veterinary*; D005260:Female; D006339:Heart Rate / Q000502:physiology*; D008297:Male; D013610:Tachycardia / Q000503:physiopathology / Q000662:veterinary; D013617:Tachycardia, Supraventricular / Q000503:physiopathology / Q000662:veterinary; D013997:Time Factors