disease has feature Aortic valve stenosis aortic valve disorder disorder of development or morphogenesis aortic valve stenosis https://github.com/monarch-initiative/mondo/issues/4636 https://github.com/monarch-initiative/mondo/issues/6876 valvular aortic stenosis UMLS:C0003507 ICD10CM:I06.0 MESH:D001024 HP:0001650 Aortic valve stenosis (AVS) is a condition characterized by narrowing of the heart's aortic valve opening. This narrowing prevents the valve from opening fully, which obstructs blood flow from the heart into the aorta, and onward to the rest of the body. AVS can range from mild to severe. Signs and symptoms typically develop when the narrowing of the opening is severe and may include chest pain (angina) or tightness; shortness of breath or fatigue (especially during exertion); feeling faint or fainting; heart palpitations; and heart murmur. Individuals with less severe congenital AVS (present at birth) may not develop symptoms until adulthood. Individuals with severe cases may faint without warning. AVS can have several causes including abnormal development before birth (such as having 1 or 2 valve leaflets instead of 3); calcium build-up on the valve in adulthood; and rheumatic fever. AS icd11.foundation:956813047 aortic stenosis ICD9:395.0 MONDO:0042981 rheumatic aortic valve stenosis SCTID:60573004 NCIT:C50462 rheumatic aortic stenosis NANDO:2200306 SCTID:72011007 DOID:1712 MEDGEN:1621