Harimurti GM, Munawar M. The role of transthoracal echocardiography in closing secundum atrial septal defects with Amplatzer Septal Occluder. Med J Indones [Internet]. 2007 Feb. 1 [cited 2025 Apr. 3];16(1):14-8. Available from: http://mji.ui.ac.id/journal/index.php/mji/article/view/251