Stenosis
The narrowing of an organ of passage such as a blood vessel or intestine. A narrowing or contraction of an opening,
- aortic stenosis obstruction of the blood flowing from the left ventricle to the aorta,
- mitral stenosis narrowing of the mitral valve that separates the left atrium and the left ventricle,
- pulmonary artery stenosis narrowing of the outflow from the lungs,
- subaortic stenosis narrowing of the aorta just below the semilunar valves, Severity increases with age,