Aortic stenosis or aortic valve stenosis occurs when the aortic valve of the heart narrows down. The narrowing of the aortic valve stops it from opening completely, which obstructs the flow of blood from the heart into the aorta and the rest of the body. Under this condition, the heart needs to exert harder in pumping blood to the body. This exertion from the heart’s end might cause the heart muscles to weaken, limiting the amount of blood being pumped. If somebody has a severe case of aortic valve, they will need a surgery to replace the damaged valve, or else it can lead to grave heart problems. Aortic stenosis majorly affects old people, as the valve that is defective usually hardens and narrows down.