Keyword Analysis & Research: thoracic aorta size radiology

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What is the normal diameter of the thoracic aorta?

What is the size of a normal thoracic aorta? For the thoracic aorta , a diameter greater than 3.5 cm is generally considered dilated, whereas greater than 4.5 cm would be considered aneurysmal. Aneurysms may affect one or more segments of the thoracic aorta , including the ascending aorta , the arch, and the descending thoracic aorta .

How dangerous is a 4 cm aortic aneurysm?

Size of the aneurysm is considered a strong predictor of rupture risk. The larger the aneurysm the greater the risk. And the risk increases significantly when the diameter of the bulge exceeds 5.5 cm (more than 3 cm is considered an aortic aneurism, and 4 cm indicates “clinical significance”). Surgical repair is warranted at that size as well.

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