Key result
Pacemaker implantation successfully managed paroxysmal atrioventricular block with Wenckebach cycles in a dog for 13 years and 3 months.
Why the study?
Does pacemaker implantation provide successful long-term management in a dog with paroxysmal atrioventricular block with Wenckebach cycles?
Case Report (n=1)
No
Does pacemaker implantation provide successful long-term management in a dog with paroxysmal atrioventricular block with Wenckebach cycles?
Pacemaker implantation provided successful long-term management (over 13 years) for a dog with paroxysmal AV block with Wenckebach cycles and syncope.
May guide pacemaker decisions in symptomatic dogs with rare AV block; leaves open prevalence and mechanisms across breeds.
This is the first report of paroxysmal atrioventricular block with Wenckebach cycles in a dog exhibiting syncope. The patient was a 1-year-old female Shiba Inu referred to our hospital with chief complaints of exercise intolerance, dizziness during walking, and tongue discoloration. Pacemaker implantation was performed based on the clinical presentation and Holter electrocardiogram findings. In this case, long-term management was successfully achieved for 13 years and 3 months (Age 15 years old) after the placement of pacemaker. A histopathological examination revealed that no abnormalities in the conduction system were detected that could explain the arrhythmia. Consequently, the arrhythmia was suspected to have been caused by vagus nerve stimulation.
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MORITA et al. (2025) conducted a case report in Paroxysmal atrioventricular block with Wenckebach cycles (n=1). Pacemaker implantation was evaluated on Clinical improvement and long-term survival. Pacemaker implantation successfully managed paroxysmal atrioventricular block with Wenckebach cycles in a dog for 13 years and 3 months.
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