Narrowing of the aortic valve in the heart.
The aortic valve controls blood flow from the left ventricle to the aorta and the rest of the body. It opens when the ventricle contracts and closes when the ventricle relaxes.
Source: ADAM Encyclopedia
The aorta is the main artery carrying blood out of the heart. When blood leaves the heart, it flows through the aortic valve, into the aorta. In... Read more »
Source: ADAM Encyclopedia
Pulmonary valve stenosis is a heart valve disorder that involves the pulmonary valve. This valve separates the right ventricle (one of the chambers... Read more »
Source: ADAM Encyclopedia
Mitral stenosis is a heart valve disorder that involves the mitral valve. This valve separates the upper and lower chambers on the left side of the... Read more »
Source: HealthCentral Encyclopedia
Spinal stenosis occurs when the spinal canal is narrowed or compromised, leaving inadequate room for the nerves.The causes of stenosis vary. The... Read more »
Damage to the spinal cord, an information superhighway that originates in the brain, is a very devastating injury that can lead to paralysis. Most... Read more »