“Busty” an Irish Setter, male, 1 year old from Gottinger (D) was referred to the Electrophysiologic laboratory of Clinica Veterinaria Malpensa lead by Dr Roberto Santilli for frequent episodes of supraventricular tachycardia inducing periodic weakness, to perform an endocardial mapping and possibly radiofrequency catheter ablation of the underlining arrhythmic substrate. During electrophysiologic study Busty presented several episodes of atrioventricular reciprocating tachycardia mediated by a right posterior accessory pathway that was successfully eliminated with radiofrequency catheter ablation. After two days in ICU, Busty has been discharged and went home in Germany without recurrence of tachycardia.