Shone's syndrome is a rare congenital heart disease that includes 4 
cardiovascular anomalies: supravalvular mitral ring, parachute mitral valve, 
subaortic stenosis, and coarctation of the aorta. Early diagnosis and treatment 
result in better outcomes. Echocardiography plays an important role in the 
diagnosis and is the optimal examination for detecting this disease. Pressure 
gradients are often unreliable and inaccurate; thus, careful anatomical 
observation of the left ventricular inflow and outflow tracts, particularly the 
mitral valve, is vital for accurate diagnosis and planning appropriate 
management. Herein, we describe 9 cases of Shone's syndrome, diagnosed with 
echocardiography and treated surgically.