title: The relationship of resting S-T segment depression to the severity of subvalvular aortic stenosis and the presence of ventricular premature complexes in the dog.
abstract: Electrocardiograms (ECG) from 35 dogs with subvalvular aortic stenosis (SAS) with a left ventricular outflow tract pressure gradient (PG) of > or =50 mm Hg were retrospectively evaluated for S-T segment depression (STD, > or =0.2 mV in lead II). Pressure gradient, age, heart rate (HR), and number of ventricular premature complexes (VPCs) on a 24-hour ambulatory ECG for dogs with STD were not significantly different from those for dogs without STD. The S-T segment deviation did not correlate significantly with PG, age, HR, or VPCs. The significance of STD in the dog with SAS remains uncertain. Long-term prospective studies are needed to fully understand this observation.
authors.affiliation: Department of Veterinary Clinical Sciences, College of Veterinary Medicine, The Ohio State University, Columbus, Ohio 43210, USA.
authors.forename: Grace M
authors.initials: GM
authors.lastname: Davainis
authors.forename: Kathryn M
authors.initials: KM
authors.lastname: Meurs
authors.forename: Nicola A
authors.initials: NA
authors.lastname: Wright
mesh_terms: D000367:Age Factors; D000818:Animals; D001020:Aortic Stenosis, Subvalvular / Q000175:diagnosis / Q000473:pathology / Q000662:veterinary*; D003937:Diagnosis, Differential; D004283:Dog Diseases / Q000175:diagnosis* / Q000473:pathology; D004285:Dogs; D015150:Echocardiography, Doppler / Q000379:methods / Q000662:veterinary*; D004562:Electrocardiography / Q000379:methods / Q000662:veterinary*; D015716:Electrocardiography, Ambulatory / Q000379:methods / Q000662:veterinary; D012189:Retrospective Studies; D012720:Severity of Illness Index; D018879:Ventricular Premature Complexes / Q000175:diagnosis / Q000473:pathology / Q000662:veterinary*