Background:
Thoracic aortic aneurysm(TAA) is frequently observed in abdominal aortic
aneurysm(AAA) patient. The aim of this study is to know the relation between
presence of TAA and AAA growth
Methods:
We reviewed 84 patients with AAA (>3 CM) who have followed by ultrasound
or CT scans at least 6 month interval. Especially we measured AAA diameter
,area,length, and mural thrombus Area at maximal diameter on orthogonal
plane by specialized software. Also we checked the presence of TAA(> 4CM)
and location and measured biochemical and clinical variables.We defined
rapid growh when the AAA diameter increased > 3 mm/Yr
Results:
We included 70 male and 14 female patient, a mean of follow up was 21.63
±16.13 month. The mean age is 69.08 ± 8.43 Yr. Total 24 (28%) patient
had TAA.
The mean initial diameter of AAA is 45.24 ± 9.46 mm ,area is 4662 ± 706
mm2.In the rapid expansion group (n=26, 37.6%), they had more thoracic
aortic aneurysm (odd ratio 3.88.P=0.022). They had more ascending aortic
aneurysm (odd ratio = 3.56 P=0.047) but not descending aortic aneurysm
(P=0.34). They had more high TG (p=0.001), larger initial diameter (p=0.001)
and area (P < 0.01),thrombus area(P = 0.002) and longer length(P=0.0025).
The inital diameter had positive correlation with thrombus area (r=0.62
P<0.001) and length (r=0.63 P < 0.001). The expansion rate had positive
correlation with thrombus area (r=0.268 P=0.025),length(r=0.266 P=0.021).
Conclusion:
The presence of TAA and length of AAA is related with rapid AAA growth.
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