Intermittent Advanced Bachmann‘s Bundle Block in a Boxer Dog

ABSTRACT

There is a lack of studies on the occurrence of spontaneous conduction disturbances at atrial level in small animals. Bachmann´s bundle block is a particular type of interatrial cardiac conduction disturbance that is characterized by a variable delay on electrical depolarization of both atria resulting in prolonged P waves duration on the electrocardiogram. It is currently classified as partial or advanced depending on the grade of severity of the conduction delay. In humans the advanced form of Bachmann’s bundle block has low prevalence but is clinically very important because predicts left atrial enlargement and arrhythmias. The objective of this paper was to report the electrocardiographic findings identified to as intermittent advanced Bachmann’s bundle block in a Boxer dog with clinical signs of congestive heart failure.