fig29

Figure 29. Echo-Doppler images of the atrial septum in apical four-chamber projections illustrating left-to-right shunt across an atrial septal defect (ASD) before (A) and 3 months following (B) deployment of a buttoned device. No residual shunt is observed in (B). A black arrow shows the occluder (O) on the left atrial (LA) and a white arrow shows the counter-occluder (CO) end in the right atrial (RA) side of the atrial septum. The left ventricle (LV) and right ventricle (RV) are labeled. Reproduced from Ref.^[27].