• 1.

    Meurs KM, Miller MW, Slater MR. Arterial blood pressure measurement in a population of healthy geriatric dogs. J Am Anim Hosp Assoc 2000;36:497500.

    • Search Google Scholar
    • Export Citation
  • 2.

    Schamroth L. Idioatrial rhythm—atrial escape rhythm. In: Schamroth L, ed. The disorders of cardiac rhythm. 2nd ed. Oxford, England: Blackwell Scientific Publications, 1971;3739.

    • Search Google Scholar
    • Export Citation
  • 3.

    Tang CW, Scheinman MM, Van Hare GF, et al. Use of P wave configuration during atrial tachycardia to predict site of origin. J Am Coll Cardiol 1995;26:13151324.

    • Search Google Scholar
    • Export Citation
  • 4.

    Kistler PM, Roberts-Thompson KC, Haqqani HM, et al. P-wave morphology in focal atrial tachycardia: development of an algorithm to predict the anatomic site of origin. J Am Coll Cardiol 2006;48:10101017.

    • Search Google Scholar
    • Export Citation
  • 5.

    Mirowski M. Left atrial rhythm: diagnostic criteria and differentiation from nodal arrhythmias. Am J Cardiol 1966;17:203210.

  • 6.

    Parsonnet AE, Miller R. Heart block: the influence of ventricular systole upon the auricular rhythm in complete and incomplete heart block. Am Heart J 1944;27:676687.

    • Search Google Scholar
    • Export Citation
  • 7.

    Tilley LP. Analysis of common canine cardiac arrhythmias. In: Tilley LP, ed. Essentials of canine and feline electrocardiography: interpretation and treatment. 3rd ed. Philadelphia: Lea & Febiger, 1992;127207.

    • Search Google Scholar
    • Export Citation
  • 8.

    Zimmermann M, Kalusche D. Fluctuation in autonomic tone is a major determinant of sustained atrial arrhythmias in patients with focal ectopy originating from pulmonary veins. J Cardiovasc Electrophysiol 2001;12:285291.

    • Search Google Scholar
    • Export Citation

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ECG of the Month

Sarah E. Achen DVM1, Ashley B. Saunders DVM, DACVIM2, and Matthew W. Miller DVM, MS, DACVIM3
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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.
  • | 3 Department of Small Animal Clinical Sciences, College of Veterinary Medicine and Biomedical Sciences, Texas A&M University, College Station, TX 77843-4474.

A 6-year-old spayed female Basset Hound was re-ferred to the Texas A&M University Veterinary Medical Teaching Hospital for evaluation of sudden onset of lethargy, polyuria-polydipsia, peripheral edema, abdominal distention, diarrhea, and hypoalbuminemia. The dog had a history of hypothyroidism, hyperadrenocorticism, and recurrent urinary tract infections. At the time of this initial evaluation, it was being treated with thyroid hormone supplementation, trilostane, nitrofurantoin, vitamin C (to control urine pH), and diphenhydramine (for seasonal allergies).

At the initial examination, the dog was bright, alert, and mildly tachypneic (respiratory rate, 42 breaths/ min). Thoracic auscultation revealed normal bronchovesicular sounds, muffled heart sounds,