LAUSR

Introduction Ectopic atrial tachycardia occurs at a rate of 5%–20% among children with supraventricular tachycardia. Atrial appendages are the most frequent focus in children, differing from the situation in adults. However, ectopic atrial tachycardia originating from aneurysms of the right atrial appendage is very rare and in fact has not yet been clearly defined. We describe 3 cases of children with ectopic atrial tachycardia resulting from right atrial appendage aneurysms that proved refractory to radiofrequency catheter ablation. All 3 children were treated surgically. Written consent from the legal guardians of the patients was received for publication of the details of these cases.