fig3

Figure 3. Echocardiographic studies in parasternal long-axis (A) and apical five-chamber (B) projections illustrating the subaortic membrane (SAM). The position of the aortic valve (AV) is shown. Continuous wave and color Doppler studies demonstrated elevated Doppler flow velocity across SAM, but are not shown in these echo frames. The left atrium (LA) and left ventricle (LV) are labeled. Reproduced from Ref.^[4].