No. Both are equally dangerous.
A ascending aortic aneurysm are the second most common aortic aneurysms to abdominal aortic aneurysms. These aneuryms are typically diagnosed in patients that are in their 6th or 7th decade in life. A patient experiencing an ascending aortic aneurysms will feel chest pain.
blood travels from the ascending aorta to the aortic arch to the descending aorta
from what I have learned, on average it grows .2 to .4 a year. Given that some do not grow and others grow faster. I have a thoracic ascending aortic aneurysm that has grown from 3.0 (normal) to 4.7. It is checked every year.
The descending aorta.The aorta is divided in ascending, aortic arch, descending, thoracic, and abdominal.
According to the Mayo Clinic, surgery for an aortic aneurysm depends on where the aneurysm is and how fast it is growing. If it's a slow growing aneurysm, the doctor might choose to simply wait and see how the aneurysm is progressing as it might not require surgery at all. If it is a fast growing aneurysm, the doctor would prefer to plan a surgery in advance but will perform an emergency surgery if the aneurysm is in danger of bursting.
It is an aortic arch with an aneurysm.
The aorta consists of : the ascending aorta, the arch of the aorta, the thoracic portion of the descending aorta, and the abdominal portion of the descending aorta.
The aorta is one vessel that can be conceptualized in six parts: The aortic root: connects the aorta to the left ventricle. The coronary arteries emerge from this part. Ascending aortia: Moving away from the heart towards the neck. Aortic arch: the aorta turns at this point to descend towards the rest of the body. Branches to the brain and upper extremities branch away here. Descending aorta: extends down the back and divides into the common iliac arteries. The portion above the diaphragm is the thoracic aorta, the portion below the diagram is the abdominal aorta.
Aortic dilation is the widening of the aorta. This widening could be an aortic aneurysm.
The purpose of aneurysmectomy is to repair an aortic aneurysm that is likely to rupture if left in place. Aneurysmectomy is indicated for an aortic aneurysm that grows to at least 2 in(5 cm) or for an aortic aneurysm of any size that is symptomatic.
If its dilated up to 3 cm, seems to be a precursor condition to distended (swollen) condition which is a precursor to a ruptured aorta Usually occurs in the descending (or abdominal) aorta.
If you are talking about where does the blood inside the descending aorta come from, it comes from the aortic arch, which comes from the ascending aorta. If you are talking about the blood that nourishes the tissues of the aorta, it is the vasa vasorum.