Movie 9.10A: Parasternal long-axis view showing moderate concentric left ventricular hypertrophy, fixed linear echodensities on the anterior and posterior aspects of the left ventricular outflow tract consistent with discrete subaortic membrane. Doming of the aortic valve consistent with bicuspid aortic valve. There is also narrowing of the sinotubular junction of the aorta with dilatation of the proximal ascending aorta.