The cardiologist examines a client's echocardiogram and determines that the client has aortic stenosis. The cardiologist explains that a frequent cause of this valve disease is which of the following?

The most common cause of aortic stenosis is the build up of calcium deposits on the aortic valve, which increases with age causing the aortic valve to stiffen and narrow over time. This results in impaired blood flow between the heart and body