Santoro G, et al. - A large, single-center experience of percutaneous arterial duct (AD) closure in infants < 6 kg was reported. The most frequently used devices, Amplatzer Duct Occluder type I (ADO I) and Amplatzer Duct Occluder type II Additional Sizes devices (ADO II-AS) were compared. Based on the results, it was reported that transcatheter closure of AD with Amplatzer Duct Occluder devices is feasible, safe, and effective in infants less than 6 kg. No prominent variation was demonstrated between the most commonly used devices (ADO I and ADO II-AS).