The aorta is the large artery that originates in the left ventricle (lower chamber) of the heart. Aortic stenosis is the narrowing or obstruction of the heart´s aortic valve, which prevents it from opening properly and blocks the flow of blood from the left ventricle to the aorta. Below you may find medications used to treat or help with Aortic Stenosis. More about Aortic Stenosis