The life expectancy of a person with severe aortic stenosis who undergoes aortic valve replacement surgery, can be close to that of an average person, states WebMD. A person with severe aortic stenosis who does not undergo valve replacement surgery has a life expectancy of two to three years.
Aortic stenosis is a condition in which the aortic valve becomes narrow and is unable to function properly, states WebMD. Heart failure is the leading cause of death among sufferers of aortic stenosis. Common symptoms of aortic stenosis are chest pain, fainting and shortness of breath. In rare cases, sudden death is the first symptom of aortic stenosis, notes MedicineNet.