Ad
related to: descending thoracic aortawexnermedical.osu.edu has been visited by 10K+ users in the past month
- Abdominal Aortic Aneurysm
Multidisciplinary Care Team
Endovascular and Open Treatments
- Integrated Vascular Care
Coordinated care from experts
diagnosis, management and treatment
- Find a Doctor
Meet with our experts to diagnose
your symptoms and receive treatment
- Prepare For Your Visit
What to bring to your visit
plus heart & vascular resources
- Abdominal Aortic Aneurysm
Search results
Results from the WOW.Com Content Network
The thoracic aorta is a continuation of the descending aorta and becomes the abdominal aorta when it passes through the diaphragm. The initial part of the aorta , the ascending aorta , rises out of the left ventricle, from which it is separated by the aortic valve .
The descending aorta anatomically consists of two portions or segments, the thoracic and the abdominal aorta, in correspondence with the two great cavities of the trunk in which it is situated. Within the abdomen, the descending aorta branches into the two common iliac arteries which serve the pelvis and eventually legs.
Major aorta anatomy displaying ascending aorta, brachiocephalic trunk, left common carotid artery, left subclavian artery, aortic isthmus, aortic arch, and descending thoracic aorta. The aorta supplies all of the systemic circulation, which means that the entire body, except for the respiratory zone of the lung, receives its blood from the aorta.
The vast majority of aortic dissections originate with an intimal tear in either the ascending aorta (65%), the aortic arch (10%), or just distal to the ligamentum arteriosum in the descending thoracic aorta (20%). [clarification needed] As blood flows down the false lumen, it may cause secondary tears in the intima.
A thoracic aorta greater than 4.5 cm is generally defined as aneurysmal, while a size greater than 5.5 cm is the distinction for treatment, which can be either endovascular or surgical, with the former reserved for pathology at the descending aorta.
Coming out of the heart, the thoracic aorta has a maximum diameter of 40 mm at the root. By the time it becomes the ascending aorta, the diameter should be < 35–38 mm, and 30 mm at the arch. The diameter of the descending aorta should not exceed 25 mm. [8] [9] The arch of the aorta lies within the mediastinum.
In patients with thoracic aortic disease involving the arch and descending aorta, it is not always possible to perform a completely endovascular repair. This is because head vessels of the aortic arch supplying blood to the brain cannot be covered and for this reason, there is often an inadequate landing zone for stent-graft delivery.
Between the mobile ascending aorta and the relatively fixed descending thoracic aorta is the aortic isthmus. When there is a sudden deceleration the mobile ascending aorta pushes forward creating a whiplash effect on the aortic isthmus. [9] However, a different mechanism is involved when the ascending aorta proximal to the isthmus is torn.
Ad
related to: descending thoracic aortawexnermedical.osu.edu has been visited by 10K+ users in the past month