Fig. 2From: Clinical evaluation of percutaneous and intra-operative device closure of atrial septal defects under transesophageal echocardiographic guidance: one center experience and mid-term follow-upTwo-dimensional transoesophageal echocardiography(TEE) imaging (a-f). a Two-dimensional image shows a larger defect. b There is not well rim around the defects(white arrow). c The delivery catheters crossing the defect. d The delivery catheters and atrial septal form an angle(α°). e A mild residual shunt(white arrow) after completely released device. f The occlusion is finished and the device keep perfect form(white arrow).LA:left atrium; RA:right atriumBack to article page