Source:http://linkedlifedata.com/resource/umls/id/C0003507
MSH: A pathological constriction that can occur above (supravalvular stenosis), below (subvalvular stenosis), or at the AORTIC VALVE. It is characterized by restricted outflow from the LEFT VENTRICLE into the AORTA.,CSP: constriction in the opening of the aortic valve or of the supravalvular or subvalvular regions.,NCI: Narrowing of the orifice of the aortic valve or of the supravalvular or subvalvular regions.,NCI: Narrowing of the orifice of the aortic valve or of the supravalvular or subvalvular regions.