Spinal stenosis refers to the narrowing of the spinal canal, which is the space in the center of the vertebrae containing the spinal cord and nerve roots. At its most severe or final stage — known as ...

Severe aortic stenosis is the final stage of aortic stenosis, which is the narrowing of the aortic valve. In severe aortic stenosis, symptoms can impair quality of life. Stenosis refers to a narrowing ...