Aneurysms in the aorta are classified based on their anatomical locations. Largely, they can be divided into two classes: thoracic aortic aneurysm (TAA), those that are in the thoracic aorta, and abdominal aortic aneurysm (AAA), those that are in the abdominal aorta.
Thoracic aortic aneurysm (TAA) can further be divided into:
Aortic root aneurysm
Ascending aortic aneurysm
Aortic arch aneurysm
Descending aortic aneurysm
Aneurysm that straddles multiple portions of the aorta (i.e. from aortic arch to descending aorta)
Abdominal aortic aneurysm (AAA) can be classified as:
Suprarenal aortic aneurysm: above the kidneys
Infrarenal aortic aneurysm: below the kidneys.
Others: Pararenal, Jaxtarenal aortic aneurys.
Most patients with aortic aneurysms (AA) are asymptomatic at the time of diagnosis, because the aneurysms are typically discovered incidentally on imaging studies. When an AA reaches medium to large size (>5cm), symptoms may manifest.
The patient had undergone a diagnostic intervention, during which a CT scan was done on the chest and abdomen of the subject. The CT scan created images of the thoracic and abdominal regions. An evaluator then reviewed the images of the thoracic region and abdominal region, to find whether aneurysms and arterial dissections are present and where they are located.
TAA and AAA concept map 2
Case 1 - Subject has both TAA and AAA
The subject had CT scans performed on the chest and abdomen.
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pr.xpt
Row
STUDYID
DOMAIN
USUBJID
PRSEQ
PRTRT
PRLOC
VISIT
1
ABC
PR
ABC-123
1
CT SCAN
CHEST
BASELINE
2
ABC
PR
ABC-123
2
CT SCAN
ABDOMEN
BASELINE
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An evaluator examines the images of the thoracic and abdominal regions produced by the CT scan and decides whether TAA and AAA are present as well as their location. Modeling both TAA and AAA in the CV domain, note for viewing simplicity, some variables are omitted from the table below.
Row 1:
I examined the image of the thoracic region (test location) and found an aneurysm in the Thoracic Aorta (result location) spanning from the aortic arch to the descending aorta (result location detail). In this case result location detail further qualifies both ORRES and RESLOC, hence this is a variable qualifier.
Row 2:
I measured the diameter of the aneurysm from aortic arch to the descending aorta (test location).
Row 3:
I examined the image of the thoracic region (test location) and found that the descending aorta (result location) had severely dissected (the artery is tore and a false lumen had formed), most likely due to the enormous pressure caused by the large aneurysm in this area.
Row 4:
The dissected descending aorta (test location) is classified based on the Stanford Aortic Dissection System as type B.
Row 5:
I examined the image of the abdominal region (test location) and found an aneurysm in the infrarenal aorta (result location), proximal to the iliac bifurcation (result location detail). In this case result location detail is a variable qualifier for the result, I am trying to say that the aneurysm is located in the segment of the infrarenal aorta closer (proximal) to the iliac bifurcation.
Row 6:
I measured the diameter of the infrarenal aortic (test location) aneurysm.
Row 7:
I examined the image of the abdominal region and found that the infrarenal aorta (result location) had dissected.
The subject had a MRI performed on the torso (trunk).
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pr.xpt
Row
STUDYID
DOMAIN
USUBJID
PRSEQ
PRTRT
PRLOC
VISIT
PRLOC1
PRLOC2
1
ABC
PR
ABC-456
1
MRI
Multiple
BASELINE
Chest
Abdomen
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The MRI scan produced images about the thoracic and abdominal regions of the subject. The evaluator then examined the MRI images of the thoracic region and abdominal region, and found the presence of a large AAA, but the absence of TAA.
Row 1:
I examined the MRI image of the thoracic region (test location) and didn't find the presence of an aneurysm.
Row 2:
I examined the MRI image of the abdominal region (test location) and found an aneurysm in the left (Result LAT) renal artery (Result Loc).
Row 3:
I examined the image of the abdominal region (test location) and found an aneurysm in the infrarenal aorta (Result Loc).
Row 4:
I measured the diameter of the aneurysm in the left renal artery (test location).
Row 5:
I measured the diameter of the aneurysm in the Infrarenal Aorta (test location).
