12 Key and Core Catalog With a mechanical key system, the level of security is determined by masterkey control. A masterkey system enables facilities of any size to manage the building by defining access by person and by area in increasing levels of complexity. Since BEST invented the standard for masterkey systems, there is no
When they occur in the upper part of the aorta, they are called thoracic aortic aneurysms. Aneurysms can occur anywhere in the thoracic aorta, including the ascending aorta near the heart, the aortic arch in the curve of the thoracic aorta and the descending aorta in the lower part of the thoracic aorta.
You didn't mention whether the dilation is in the ascending aorta, descending aorta, or aortic arch, or whether the dilation is thoracic (chest) or abdominal. One other possibility is that the dilation is of the aortic root (just above the aortic valve).asically, a dilated aorta is an aneurysm. As long as an aneurysm is stable (not growing) and isn't too big already, your Dr can keep an eye on it with annual echos. The risk with too-large or growing aneurysms is that the aneurysm might burst (dissect-think John Ritter).