Aortic valve stenosis, or aortic stenosis, is a relatively common heart condition. Generally, blood is pumped by the heart to the rest of the body, exiting the heart through the aortic valve. Aortic stenosis is characterized by a narrowing of this valve. This narrowed valve can hinder blood flow from the heart, also causing the heart to work harder. Over time, this may weaken the heart muscle and cause fatigue and dizziness. Other symptoms include: chest pain, coughing (sometimes bloody), and breathing problems. Symptoms experienced by infants include: failure to gain weight, difficulty feeding, and serious breathing problems. This condition can be present from birth, but most often develops later in life due to the buildup of calcium in the valve. Aortic stenosis can affect both men and women, but is more common in men. Treatment includes medication to control blood pressure and possibly surgery to replace the valve.