Source:http://linkedlifedata.com/resource/umls/id/C0003500
NCI: An aortic stenosis caused by fibromuscular stenosis or hypertrophic cardiomyopathy. It may be associated with congenital heart defects.,MSH: A pathological constriction occurring in the region below the AORTIC VALVE. It is characterized by restricted outflow from the LEFT VENTRICLE into the AORTA.