subaortic stenosis

subaortic stenosis Narrowing of the left ventricle of the heart, just below the aortic valve, through which blood must pass on its way up into the aorta. The narrowing restricts the flow of blood. Subaortic stenosis may be present at birth (congenital) or acquired as part of a specific form of heart disease known as idiopathic hypertrophic subaortic stenosis (IHSS). Treatment options include use of drugs and surgery. See also idiopathic hypertrophic subaortic stenosis.