fig36

Figure 36. Two-dimensional (A) and color Doppler (B) images from apical four-chambered views demonstrating an ostium primum atrial septal defect (Primum ASD) (long red arrow in A) with a left-to-right shunt (long red arrow in B). Mitral regurgitation (MR) jet is marked in (B) (thick red arrow). The left atrium (LA), left ventricle (LV), right atrium (RA), and right ventricle (RV) are marked. Modified from Ref.^[24].