Arnolda Marija Baškytė1, Agnė Kavaliauskaitė1, Saulius Lukoševičius2, Carl Bruno Neisser3
1Lithuanian University of Health Sciences, Kaunas Lithuania
2Department of Radiology, Lithuanian University of Health Sciences, Kaunas Lithuania
3Department of Obstetrics & Gynaecology, St. Joseph Krankenhaus, Berlin, Germany
The aim: to accomplish CT measurements and evaluate the impact of unchangeable risk factors and comorbidities on size and location of infrarenal AAA.
Methods: This is a retrospective evaluative study, in which we have evaluated CTA images of AAA of 46 patients. The measurements of the AAA have been conducted using the Syngovia program.
Results: There were 46 patients who participated in this study (7 female and 39 male). The average age of the men patients was 72,32 and 71,57 for women. The average length and width of AAA in a male group were 8,76 cm x 5,52 cm, respectively 7,48 cm x 4,79 cm in a female group. The most common comorbidities of the patients are hypertension, atherosclerosis, angina pectoris and stenosis of coronary arteries. The width of the aneurysm in hypertensive patients is estimated to be greater than 0.67 cm. Linear regression analysis showed that if the length increases by 1 cm, the width grows by 0,28 cm, accordingly, if width increases by 1 cm, the length grows by 1,36 cm. It was found, that the number of comorbidities, male gender and width of aneurysm affects the distance from AAA to aortic bifurcation. Also, there is a statistically significant correlation between the length and the distance from AAA to lower renal artery.
Conclusions: 1. Female gender affects the size of AAA: smaller length and width of aneurysms were observed. Male gender leads to the formation of larger thrombi. 2. The length of AAA was the most statistically significant variable since the P-value was always <0,05. Therefore, it is considered a good tool to use in evaluation of AAA size and location characteristics. 3. The linear regression analysis showed that hypertension has a statistically significant effect on the width of AAA by increasing its size.
Keywords: Abdominal aortic aneurysm, CTA, hypertension, infrarenal AAA.