ABSTRACT
86 A 9-year-old male intact Boxer dog presents with a history of sudden onset episodes of weakness and collapse. The owner reports that these episodes usually, but not always, occur after the dog has been exercising. On physical examination the dog is bright, alert, and responsive and body temperature and respiratory rate are within normal limits. The dog has marked bradycardia and his pulse is bounding. You do not perceive any pulse deficits.
