Abstract
Transcatheter device closure of atrial septal defect (ASD) is associated with increased complications in small children in device size ≥ 19mm or indexed size ≥ 0.18 mm/cm and weight≤ 15 kg. Complete atrioventricular heart block (CHB) is reported as a rare complication of ASD device closure. We report the case of a 7year-old boy, 23kg weight, underwent device closure of ASD and subsequently developed CHB next day after the procedure which was completely resolved by day 3 with steroid treatment. Similar case reports were rarely reported in the literature. Keywords: atrial septal defect, complete heart block, device/height ratio.
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