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.
Ponies tend to have a calmer temperament than horses. Ponies are also good pack animals. Though ponies are used for pulling carts and carriages, the horses are more frequently used for this. People do not like to ride ponies, but they mostly prefer a ride on a horse. Summary: 1.Ponies are shorter than horses. When ponies come to a height up to 14.2 hands (hands are generally used to determine the height of horses and ponies), the horses come to a height of more than 14.2 hands and mostly 15.2 hands. It is not only that the pony and horse are different in their height, but they also show certain distinct features. When comparing the body features, ponies are a bit stockier than horses. Ponies are stronger than horses. As the ponies have a sturdy body, they have more resistance to cold conditions than horses.