Figure 2.

Large atrial septal defect that is measured at 21 mm on transesophageal echocardiography (A) in a 9.7 kg, 11-month-old infant with failure to thrive. (B) The transoesophageal echocardiography diameter is confirmed with the sizing balloon under fluoroscopy. After a 22 mm Amplatzer ASO is successfully implanted post-procedure transthoracic echocardiography in 4 chambers view confirms good position of the device and demonstrates a new mild mitral regurgitation that is functional, due to the sudden increase in left ventricular volume (C). This mild mitral regurgitation will disappear after a few weeks on follow-up echocardiography.