The Analysis of Morphoradiological Parameters in Predicting Risk of Basilar Artery Tip Aneurysm Rupture: A Retrospective Cohort Study

Abdulaziz Al-Sharydah,1 Abdulrahman Al-Abdulwahhab,1 Sari Al-Suhibani,1 Afnan Al-Muhanna,1 Abdullah Abohimed,2 Abdulmonem AlSharidah,3 Faisal Alabbas3 1Diagnostic and Interventional Radiology Department, Imam Abdulrahman Bin Faisal University, King Fahd Hospital of the University, Al-Khobar City, Eastern Province, Saudi Arabia; 2Department of Medical Imaging, Ministry of National Guard Health Affairs, King Abdulaziz Medical City, Riyadh, Saudi Arabia; 3College of Medicine, Imam Abdulrahman Bin Faisal University, King Fahd Hospital of the University, Al-Khobar City, Eastern Province, Saudi ArabiaCorrespondence: Abdulrahman Al-AbdulwahhabDiagnostic and Interventional Radiology Department, Imam Abdulrahman Bin Faisal University, King Fahd Hospital of the University, P.O. Box: 31952 (4398), Al-Khobar City, Eastern Province, Saudi ArabiaTel +966502333711Email ahAbdulwahab@iau.edu.saPurpose: Basilar artery tip aneurysms can have fatal consequences and poor prognostic outcomes in case of rupture. We investigated the standard parameters used to evaluate aneurysmal morphology to predict aneurysm rupture.Patients and Methods: We measured the differences between ruptured and unruptured basilar bifurcation aneurysms in terms of morphological features, including aneurysm size, size ratio, aneurysm height, perpendicular height, aneurysm width, bottleneck ratio, aspect ratio, and present daughter domes, using 3D angiography.Results: Among 34 patients, 21 (61.8%) and 13 (38.2%) had ruptured and unruptured basilar tip aneurysms, respectively. In the ruptured group, the mean aneurysm size, and aspect, size, and bottleneck ratios were 6.8 ± 1.9 mm, 3.2 ± 1.0, 2.3 ± 0.5, and 2.2 ± 0.4, respectively, compared to 4.5 ± 1.5 mm, 4.4 ± 2.0, 1.6 ± 0.4, and 2.7 ± 0.7, respectively, in the non-ruptured group. Univariate analysis showed a larger aneurysmal cross-sectional diameter (odds ratio [OR], 0.50; 95% confidence interval [CI], 0.5– 5.392;