What is aortic stenosis? - Intro

Aortic stenosis is narrowing of the valve between the left ventricle and aorta. The aortic valve prevents backflow of blood from the aorta into the left ventricle when it relaxes after a contraction. Left ventricle is the lower muscular chamber of the heart which pumps blood to the whole body. Aorta is the large blood vessel arising from the left ventricle, carrying oxygenated blood.