RESEARCH COMMUNICATIONS OF THE 28th ECVIM-CA CONGRESS

Records of 76 dogs were retrospectively reviewed. All dogs presented clinical signs or electrocardiographic evidence of ventricular pre‐excitation (VPE) and/or AVRT. After physical examination, 12‐lead ECG, thoracic radiography, and echocardiogram, electrophysiological mapping was performed. Presence and location of APs, conduction pattern, refractory period of AP and AV node, type of inducible supraventricular arrhythmia, and cycle length of inducible AVRT were considered. The presence of APs was confirmed by the presence of VPE during sinus rhythm or atrial pacing and/or the presence of rapid ventriculo‐atrial activation during supraventricular tachycardia or ventricular pacing. When the AP was localized, radiofrequency energy was delivered by a conventional generator and the procedure was considered successful if no recurrence was noted 45 minutes post‐ablation.