6[1]Walsh KP，Tofeig M，Kithiner DJ，et al．Comparsion of the Sideris and Amplatzer septal occlusion devices．Am J Cardiol,1999;83(6):933
7[2]Berger F,Ewert P,Bornstad PG，et al．Transcatheter closure as standard treatment for most interatrial defects:experience in 200 patients treated with the Amplatzer septal occluder．Cardiol Young,1999;9(5):468
8[3]Chan KC，Godman MJ，Walsh K，et al，Transcatheter closure of atrial septal defect and interatrial communications with a new self expanding nitinol double disc device(Amplatzer septal occluder):multicentre UK experience．Heart,1999;82(3):300
9[4]Frommelt MA，Frommelt PC．Advances in echocardiographic diagnostic modalities for the pediatrician．Pediatr Clin North Am，1999;2:427
10[5]Lutin WA,Brummad HL,Jonec C，et al．Hemodynamic abnormalities in fetuses with congenital heart disease．Pediatr Cardiol，1999;20(6):390
