Fig. 6From: Percutaneous closure of simple congenital heart diseases under echocardiographic guidanceThe learning curve of percutaneous treatment for different types of congenital heart disease. M: month, ASD: atrial septal defect, PFO: patent foramen ovale, VSD: ventricular septal defect, PDA: patent ductus arteriosus, PVS: pulmonary valve stenosisBack to article page