How to Treat Congenital Aortic Valve Subvalvular Stenosis?

Congenital aortic valve subvalvular stenosis accounts for 3% to 8% of cases with congenital left ventricular outflow tract obstruction. There are mainly two types: membrane-type subvalvular stenosis and fibromuscular septal-type subvalvular stenosis. Infants and young children without symptoms do not require surgical treatment. Surgery is only necessary when the systolic pressure gradient across the stenosis is greater than 50mmHg, the electrocardiogram shows severe left ventricular hypertrophy and injury, or secondary infection with endocarditis is present.
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