fig33

Figure 33. Echo-Doppler studies in subcostal projections of the atrial septum with color flow Doppler illustrating the buttoned device (unfilled arrowheads) across atrial septal defects in two children (A) and (B) with residual shunts (filled arrowheads). The left atrium (LA) and right atrium (RA) are marked. Reproduced from Ref.^[31].