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Atrioventricular dissociation in a cat with persistent truncus arteriosus.

Oscar Monge-Utrilla1, M Belén García-Rodríguez2, Nerea Cuesta-García3

  • 1Veterinary Hospital University of León, University of León, León, Spain.

Veterinary Medicine and Science
|April 8, 2023
PubMed
Summary

A congenital heart defect, persistent truncus arteriosus, was diagnosed in a cat with a rare third-degree sinoatrial block. This case highlights a potential link between this cardiac anomaly and specific arrhythmias in felines.

Keywords:
arrhythmiaatrioventricular dissociationcardiac malformationfeline

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Area of Science:

  • Veterinary Cardiology
  • Congenital Heart Disease in Animals
  • Feline Cardiovascular Research

Background:

  • Persistent truncus arteriosus is a rare congenital heart defect.
  • Arrhythmias can occur secondary to congenital cardiac anomalies.
  • Understanding these associations is crucial for diagnosis and treatment.

Observation:

  • A 10-month-old cat presented with severe respiratory distress, bradycardia, and a heart murmur.
  • Diagnostic imaging revealed signs of right atrial dilatation and biventricular hypertrophy.
  • Electrocardiography identified third-degree sinoatrial block, a form of atrioventricular dissociation.

Findings:

  • Necropsy confirmed a diagnosis of type 1 persistent truncus arteriosus.
  • This is the first reported case of third-degree sinoatrial block in a cat with persistent truncus arteriosus.
  • The study discusses the potential relationship between this congenital defect and the observed arrhythmia.

Implications:

  • This case expands the understanding of cardiovascular complications associated with persistent truncus arteriosus in cats.
  • It underscores the importance of thorough cardiac evaluation in young animals with respiratory signs.
  • Further research may elucidate the mechanisms linking persistent truncus arteriosus and sinoatrial node dysfunction.