An aortic valve stenosis happens when a valve opening in the largest artery in the body, the aorta, is narrowed. Because of this, the flow of blood from the left ventricle to the aorta is restricted. The left ventricle is one of four chambers in the heart. The blood it pumps into the aorta is oxygenated and circulated throughout the body.
Information. Aortic valve stenosis is one of the more common types of heart problems. Every year, about 200,000 people are diagnosed with this disorder in the United States. Most of the people affected are 60 years old and older. Because the left ventricle must work harder to pump blood into the aorta, it becomes thick and may start to put pressure on the left atrium, which is the chamber right above it. This may lead to blood back-flowing into the lungs and other abnormalities as the heart itself becomes weakened.