ABSTRACT
42 You are presented with a seven-year-old English Springer Spaniel with a history of exercise intolerance and ‘passing out’. On physical examination the dog is alert and active. On auscultation of the heart you determine that there is bradycardia (heart rate 55 bpm). The lead II electrocardiogram (ECG) you recorded for this patient is shown (42). i. Name the arrhythmia and describe its features. ii. What are the potential causes of this arrhythmia? iii. If this dogs electrolytes are normal, how would you treat it?
