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Preexcitation alternans in a dog.

G Romito¹, N Summerfield², M Baron Toaldo¹

¹Department of Veterinary Medical Sciences, Alma Mater Studiorum - University of Bologna, Italy.

Journal of Veterinary Cardiology : the Official Journal of the European Society of Veterinary Cardiology

|August 14, 2019

Summary

This study diagnosed preexcitation alternans and atrioventricular reciprocating tachycardia in a young Boxer. Conventional electrocardiography effectively identified canine atrioventricular accessory pathways and their conduction properties.

Keywords:

Accessory pathway Canine Electrocardiography Ladder diagram

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Area of Science:

Veterinary Cardiology
Canine Electrophysiology

Background:

Atrioventricular accessory pathways are a known cause of tachyarrhythmias in dogs.
Diagnosing these pathways can be challenging, requiring specialized interpretation of electrocardiographic data.

Observation:

A 3-month-old Boxer presented with clinical signs suggestive of tachyarrhythmia.
Electrocardiographic evaluation revealed preexcitation alternans and orthodromic atrioventricular reciprocating tachycardia.

Findings:

Conventional 12-lead surface electrocardiography, 24-hour Holter monitoring, and ladder diagrams were utilized.
Detailed information regarding the presence and conduction properties of canine atrioventricular accessory pathways was obtained through interpretation of these techniques.

Implications:

This case highlights the utility of standard electrocardiographic methods for diagnosing complex cardiac arrhythmias in young dogs.
Accurate identification of atrioventricular accessory pathways can guide therapeutic strategies and improve outcomes in affected canine patients.