SHUENN-NAN CHIUCHUN-WEI LUChang C.-W.Chang C.-C.MING-TAI LINJIUNN-LEE LINCHUN-AN CHENJOU-KOU WANGMEI-HWAN WU2020-12-092020-12-0920091346-9843https://www.scopus.com/inward/record.uri?eid=2-s2.0-69549084352&doi=10.1253%2fcircj.CJ-09-0123&partnerID=40&md5=1d0f01a81ffb90a86e6622b50418e889https://scholars.lib.ntu.edu.tw/handle/123456789/525299Background: The role of radiofrequency catheter ablation (RFCA) of supraventricular tachycardia (SVT) in infants and toddlers is still unclear. Methods and Results: From 1993 to 2006, 27 (17 males, 10 females) of 210 patients underwent RFCA at an age less than 6 years. Indications included drug-refractory SVT or tachycardia-induced cardiomyopathy. The medical records were reviewed and the patients were interviewed regarding their current status. The 27 patients underwent RFCA at a median age of 4.4 years (8 months to 5.9 years) and a median body weight of 15 kg (6.6-30 kg). The SVT was mainly atrioventricular reentry tachycardia (15/27) and multiple mechanisms in 3. One-third of them had associated congenital heart disease, and 5 underwent RFCA using only 2-3 catheters. Immediate success rate was 92.6%, with low early (3.7%) and late recurrence (7.4%) after 5.4±3.7 years follow-up. Tachycardia-induced cardiomyopathy was noted in 4 and resolved in all after RFCA. Procedure-related complications included complete atrioventricular block in 1 and Bezold-Jarisch reflex in another. No other risk factors for outcomes were noted, even with low body weight. Conclusions: The outcome of RFCA for medically refractory SVT, even associated with tachycardia-induced cardiomyopathy, in infants and toddlers is favorable.[SDGs]SDG3article; bezold jarisch reflex; body weight; bradycardia; cardiovascular disease; catheter ablation; child; clinical article; complete heart block; congenital heart disease; female; follow up; health status; heart catheter; human; interview; male; medical record review; outcome assessment; preschool child; recurrent disease; reentry tachycardia; risk factor; supraventricular tachycardia; tachycardia induced cardiomyopathy; toddler; Anti-Arrhythmia Agents; Atrioventricular Block; Body Weight; Cardiomyopathies; Catheter Ablation; Child; Child, Preschool; Drug Resistance; Electrophysiologic Techniques, Cardiac; Female; Humans; Infant; Male; Recurrence; Reflex; Risk Assessment; Tachycardia, Atrioventricular Nodal Reentry; Tachycardia, Supraventricular; Time Factors; Treatment Outcomejournal article10.1253/circj.CJ-09-0123196090442-s2.0-69549084352