RADIOFREQUENCY CATHETER ABLATION OF LEFT ATRIAL TACHYCARDIA ORIGINATING WITHIN THE PULMONARY VEIN IN A PATIENT WITH DEXTROCARDIA

A case is presented of a 38-year-old male with dextrocardia in whom ra diofrequency current ablation of an incessant atrial tachycardia origi nating within the infero-lateral pulmonary vein was achieved. Activati on mapping with defection of the earliest atrial activation was used f or identification of the arrhythmogenic focus. in addition to fluorosc opy, transesophageal echocardiography was used for catheter guidance d uring the transseptal puncture. The present experience suggests that l ocation of an arrhythmogenic focus within the pulmonary venous system should be considered whenever early atrial activation during ectopic a trial tachycardia is recorded at the junction between the left atrium and the pulmonary veins.