Faculty of Medicine
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Item type:Publication, Anatomical features and variations of the vertebrobasilar system(Firenze University Press, 2024-09-04); ; ; ; The posterior circulation of the brain constitutes the vertebrobasilar system and its branches, which are responsible for about 20% of the brain blood supply. The aim of this study was to describe the morphological characteristics of the vertebrobasilar system. We examined radiographs of 103 patients, 58 male and 45 females, age range from 25 - 82, mean age 58.4 years who had CT angiography undertaken for a variety of clinical reasons, performed as a part of their medical treatment at the University Institute for Radiology in Skopje, Macedonia. The left vertebral artery arose from the left subclavian artery in 94.17% and the right vertebral artery had origin from the right subclavian artery in 99.02%. Variable origin of the left vertebral artery from the aortic arch was noticed in 5.82% and in one patient (0.97%) we found atypical arisen of the right vertebral artery from the right common carotid artery. The diameter of the vertebral artery was 3.20 ± 0.74 mm on the right side and 3.33 ± 0.76 mm on the left side. The mean length of the basilar artery was 31.60 ± 5.1 mm (from 21.4 mm to 44.1 mm). The mean diameter of the basilar artery was 3.27 ± 0.52 mm (from 2.22 to 4.87 mm). Most of the SCA arise from the basilar artery as a single vessel. The most common variations of the SCA were duplication (frequency 1.94% on right and 0.97% on left) and origin from PCA (frequency 1.94% bilateral). In four patients (3.88%) we found fenestrations of posterior brain circulation, three fenestrations (2.91%) was on the basilar artery and one fenestration (0.97%) was on the vertebral artery. In one patient persistent trigeminal artery was found. A sound knowledge of vertebrobasilar system anatomy and variations is important during diagnostic, operative and endovascular procedures. - Some of the metrics are blocked by yourconsent settings
Item type:Publication, Anatomy and variations of the basilar artery examined with digital subtraction angiography(Balkan Society of Radiology, 2019-10-17); ; ; ; Introduction: The basilar artery is formed by the union of the vertebral arteries; it runs over the ventral surface of the pons and terminates at the upper border of the pons by dividing into the posterior cerebral arteries. It gives of many vital branches supplying various parts of the brain. The aim of this study was to determine origin and variations of branches of the basilar artery with DS angiography. Materials and methods: We examined radiographs of 55 patients who had DS angiography undertaken for a variety of clinical reasons, performed as a part of their medical treatment at the University Clinic for Radiology in Skopje. The study population included 27 male and 28 females, age range from 18-79, mean age 51.09 years. Results: The AICA originated from the proximal half of the basilar artery in all patients. Most of the SCA arise from the basilar artery as a single vessel (92.7% on right and 94.5% on left). The most common variations of the SCA were duplication (frequency 3.63% on right and 1.81% on left) and origin from PCA (frequency 3.63% bilateral). The PCA was evaluated in all cases. The adult configuration was present in 74.54% of the patients; fetal configuration was present in 20% of the patients and transitional configuration was present in 5.45% of the patients on the left side. On the right side adult configuration was present in 83.63% of the patients; fetal configuration was present in 14.54% of the patients and transitional configuration was present in 1.81% of the patients. Conclusion: A precise understanding of the basilar artery anatomy is fundamental for planning and performing endovascular procedures and neuro-interventions, as well as for the accurate interpretation of ischemic areas.