Echocardiography in the diagnosis of Shone’s complex and analysis of the causes for missed diagnosis and misdiagnosis

Figure 1 A case of Annulo-Leaflet mitral ring. A: Two-dimensional ultrasonography at the parasternal left ventricular long-axis view revealed thickened mitral valve and a mitral ring adhered to the anterior and posterior leaflets of the mitral valve, restricting the opening of the valve leaflets and causing mitral valve inflow tract obstruction; B: Color Doppler ultrasonography at the parasternal left ventricular long-axis view revealed that blood flow velocity increased at the mitral annulus, and the forward flow velocity of the mitral valve was increased; C: Color Doppler ultrasonography at the apical four-chamber view revealed that blood flow velocity increased at the mitral annulus, and the forward flow velocity of the mitral valve was increased; D: The forward flow velocity of the mitral valve was increased significantly, at 2.29 m/s; E: Real-time three-dimensional echocardiography showed a narrow mitral valve orifice.