Fig. 1From: An asymptomatic child of pre-perforation erosion after transcatheter closure of atrial septal defecta Red thrombosis (the triangle) attached to the anterior wall and root of the aorta. b A slit (the rightward arrow) of about 8Â mm in length on the outer membrane of the aortic root reaching to the middle layer, and a similarly sized slit (the leftward arrow) on the epicardium of the atrium correspondinglyBack to article page