Aortic stenosis is a condition in which the aorta valve (main artery of the heart) prevents supplying blood to the heart. Due to this, the normal functioning of the heart gets hampered.  The condition normally affects those people who are below the age of 70 years. Aortic stenosis is a condition that can develop in the later stages of life or can present from birth also. Rheumatic aortic stenosis, left ventricular outflow tract obstruction, aortic valve stenosis and calcium aortic stenosis are some of the alternatives name of the condition.

Generally, Aortic stenosis is the consequence of 3 causes; senile calcific aortic stenosis, congenital bicuspid valve and rheumatic fever. In the most of the cases, people get affected from the condition due to presence of a bicuspid valve, from the birth. Instead of normal 3 cusps, people with bicuspid valve have two cusps. These two cusps do not able to open widely and operate normally, thereby leading to narrowing of the heart valves and causing Aortic stenosis.

When people gets older, then also they suffer from the condition and that time senile calcific aortic stenosis is considered as the main cause of aortic stenosis. As person becomes old, protein collagen keeps on reducing and calcium deposits on the valve leaflets. This causes the thickness of valves and eventually leads towards narrowing of the heart valves. Rheumatic fever also causes aortic stenosis.

The condition can be prevented if steps would be taken to prevent rheumatic fever. And for preventing the fever, it is advised to treat strep infections immediately.