Transcatheter closure of perimembranous ventricular septal defects by a new Amplatzer membranous ventricular septal defect occluder： a single center study in Beijing

Transcatheter closure of congenital perimembranous ventricular septal defect （VSD） has always been a problem for cardiologists in the past decade because of the risks for interference with the valves and conduction system. Some devices designed for other lesions have been used for closure of perimembranous VSD,^1-3 but the result is unsatisfactory because they are difficult to use and have a high incidence of complications. Until 2002,