Stenosis means narrowing of an opening or tube. High-grade means that narrowing is severe.
Unfortunately there is no known magazine that has the name Highgrade. Please check the name of the magazine or the spelling again and resubmit the question.
Stenosis means narrowing and proximal means closer to the body.
I assume you are referring to coronary arteries, in which case, D1 is the first diagonal branch coming off the left anterior descending artery LAD). Ostial implies that it is at the opening of D1, where it takes off from the LAD.
idiopathic hypertrophic subaortic stenosis
Pyloric Stenosis
stenosis
The phrase canal stenosis refers to the narrowing of the spaces open within your spine. This can put pressure on your spinal cord and cause pain.
Pyloric stenosis is also referred to as hypertrophic pyloric stenosis
The difference between lumbar spinal stenosis and cervical spinal stenosis is mainly the location of the problem. however, between the two lumbar spinal stenosis is the more severe form of stenosis.
narrowing of the right opening through which the nerve passes
It's good news -- no spinal stenosis.
Pulmonary stenosis can be life-threatening