In older adults, mild thickening, calcification, or both of a trileaflet aortic valve without restricted leaflet motion (i.e., aortic sclerosis) affects about 25% of the population older than 65 years. Calcific aortic stenosis (Fig. 1) , however, affects approximately 2% to 3% of those older than 75 years.alcific aortic stenosis, formerly referred to as degenerative, affects trileaflet aortic valves, often in patients with other risk factors for atherosclerotic disease. The aortic valve leaflets undergo an active disease process, with lipid deposition, inflammation, and osteo-calcific changes.
The three most common toxic weeds to horses that may be contained in hay are: Hoary alyssum, wild parsnip and poison hemlock. 1  Hoary alyssum - Hoary alyssum is a perennial weed. 2  Wild parsnip - Wild parsnip is mainly found in ditches and fields and is a biennial and is poisonous to horses. 3  Poison hemlock - Poison hemlock is poisonous to horses.
Some horses are wild, but most are domestic. If you are talking about where they come from domestic or wild, they were wild at first, but when the Indians found out they were â¦ useful they tamed them.nswerBecause domestic horses are not subject to the kind of dangers that wild horses are, plus if they get sick or get injured they have humans in the form of their owners an â¦ d veterinarians to help them heal and get better.