subaortic stenosis

Subaortic stenosis is a congenital heart defect in which the left ventricle is narrowed just below the aortic valve, limiting the flow of blood. The defect can also be due to a form of cardiomyopathy. Treatment depends on the cause and severity of the narrowing and includes drugs and surgery. People with subaortic stenosis are at risk for endocarditis, an infection within the aorta or the heart valves before and after treatment and are often advised to take antibiotics before certain dental and surgical procedures to prevent it.

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