(A) Transthoracic echocardiogram of apical four chamber view showing a primum ASD (arrow). (B) Focus view of atrioventricular junction colour Doppler showing left-to-right shunt across primum ASD (arrow). (C) Short-axis view of same patient showing the tri-leaflet left AV valve. IBL, inferior bridging leaflet; LA, left atrium; LV, left ventricle; ML, mural leaflet; RA, right atrium; RV, right ventricle; SBL, superior bridging leaflet.