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Aortic stenosis is most commonly caused by age-related progressive calcific aortic valve disease (CAVD) (>50% of cases), with a mean age of 65 to 70 years. CAVD is the build-up of calcium on the cusps of the valve, and this calcification causes hardening and stenosis of the valve. [ 22 ]
Aortic stenosis is typically the result of aging, occurring in 12.4% of the population over 75 years of age, and represents the most common cause of outflow obstruction in the left ventricle. [1] Bicuspid aortic valves are found in up to 1% of the population, making it one of the most common cardiac abnormalities.
Another important cause of aortic stenosis is chronic rheumatic fever, which can cause repeated inflammation and repair, leading to fibrosis. In this case, the leaflets can actually fuse together, called commissural fusion, which can be an important distinction from the type caused by mechanical stress over time.
Rheumatic fever can be prevented by effectively and promptly treating strep throat with antibiotics. [45] Globally, rheumatic fever is seen in populations that are socioeconomically disadvantaged and with limited access to health care. [46] Overcrowding [46] [47] and exposure to domestic air pollution [47] have been cited as associated risk ...
Aortic stenosis can also be caused by rheumatic fever and degenerative calcification. [7] The most common congenital heart defect is the bicuspid aortic valve (fusion of two cusps together) commonly found in Turner syndrome .
Stenosis of Bicuspid aortic valve is like the aortic valve stenosis heart murmur. But, one may hear a systolic ejection click after S1 in calcified bicuspid aortic valves. Symptoms tend to present between 40 and 70 years of age. Mitral regurgitation is a holosystolic murmur. One can best hear it at the apex location and it may radiate to the ...
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