the first is encountered in cases of muscular ( or fibrous ) subaortic stenosis , in which the outflow tract pressure distal to the stenosis ( and proximal to the aortic valve ) is low , whereas all pressures recorded in the left ventricle proximal to the stenosis , including that just inside the mitral valve ( the initial inflow tract pressure ) are high .
C0003501
aortic valve
C0225897
left ventricle