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Diameter changes of the thoracic aorta caused by acute type B aortic dissection
Takeshi Shimamoto1,2, Tatsuhiko Komiya2, Takeshiko Matsuo2
1Department of Cardiovascular Surgery, Hamamatsu Rosai Hospital, Shizuoka, Japan.
Asian Cardiovascular & Thoracic Annals
|December 20, 2023
Summary
Type B acute aortic dissection (TBAAD) significantly increases thoracic aorta diameter, particularly in the descending aorta. Age over 80 is linked to greater diameter changes in the proximal descending aorta.
Area of Science:
- Cardiovascular Surgery
- Thoracic Aortic Disease
- Medical Imaging
Background:
- Type B acute aortic dissection (TBAAD) impact on thoracic aorta diameters is under-reported.
- Assessing pre- and post-dissection aortic dimensions is crucial for understanding disease progression.
Purpose of the Study:
- To evaluate changes in thoracic aorta diameters following Type B acute aortic dissection.
- To identify factors influencing aortic diameter changes post-TBAAD.
Main Methods:
- Compared CT angiography scans of 50 non-Marfan patients with TBAAD to historical CTs.
- Analyzed diameters of the ascending aorta, proximal arch, and descending aorta.
Main Results:
- The ascending aorta and proximal arch showed minimal changes.
- Descending thoracic aorta diameters increased by 5.7% to 9.3% post-dissection.
- Age ≥80 correlated with increased diameter in the proximal descending aorta (p=0.01).
Conclusions:
- Aortic dissection causes significant thoracic aorta diameter increases, ranging from 5.7% to 9.3%.
- The middle descending aorta exhibited the most prominent diameter changes.
- Predicting factors for aortic diameter increase remain challenging, though age is a significant factor.
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