Abstract： Focal atrial tachycardia (AT) is an uncommon chronic supraventricular tachycardia in children,often resists medical therapy and untreated may progress to tachycardiomyopathy.In adults,the responsible foci cluster around the crista terminalis,ostium of the coronary sinus,tricuspid annulus,parahisian region,superior vena cava,the mitral annulus,the ostia of the pulmonary veins and left atrial septum.In contrast,major source of half of AT during childhood were determined to be one of the atrial appendages (AA).1 Radiofrequency catheter ablation (RFCA) is becoming the preferred treatment for symptomatic,medically refractory patients with AT,2 however,it can recur after ablation because the origin in the left AA (LAA) or the right AA (RAA) is not accessible with the ablation catheter.In this study,we review the clinical results of atrial appendectomy for recurrent AT originating from the AA after RFCA in children at our hospital.