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ECG of the Month

Sarah E. Achen DVM1 and Matthew W. Miller DVM, DACVIM2
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  • 1 Department of Small Animal Clinical Sciences, College of Veterinary Medicine and Biomedical Sciences, Texas A&M University, College Station, TX 77843-4474.
  • | 2 Department of Small Animal Clinical Sciences, College of Veterinary Medicine and Biomedical Sciences, Texas A&M University, College Station, TX 77843-4474.

A 2-year-old castrated male Blue Heeler was referred to the Texas A&M University Veterinary Medical Teaching Hospital for evaluation of suspected second-degree atrioventricular (AV) block after a cardiac arrhythmia was auscultated during an annual examination by the referring veterinarian. The dog was reported to have no clinical signs of cardiac disease.

On physical examination, the dog was bright, alert, and responsive. Thoracic auscultation revealed frequent premature beats, which occurred in a bigeminal pattern. No cardiac murmurs were auscultated. Femoral pulses were strong, but deficits associated with the premature beats were evident. No additional physical examination abnormalities were detected.

Diagnostic procedures