Results 21 to 30 of about 137,386 (200)

Morphometric and Morphological Analysis of the Circle of Willis and its Variants in Adult Human Cadaver: A Retrospective Observational Study [PDF]

International Journal of Anatomy Radiology and Surgery
Introduction: Knowledge of variations in the vascular anatomy of the circle of Willis is necessary for radiologists and neurosurgeons performing radiological procedures and intracranial surgeries.
Manickavasuki Kandavadivelu, Kalaivani Gunasekaran, Praveena Ravichandran, Amudha Govindarajan, Devu Vijayan   +4 more
doaj   +1 more source

Segmentation of Circle of Willis from 7T TOF-MRI data and immersive exploration using VR

Current Directions in Biomedical Engineering, 2022
7T TOF MRI scans provide high resolution images of intracranial vasculature. When segmented, the Circle of Willis is detailed and thus opens up new possibilities, in research but also in education.
Spitz Lena, Allgaier Mareen, Mpotsaris Anastasios, Behme Daniel, Preim Bernhard, Saalfeld Sylvia   +5 more
doaj   +1 more source

Evidence and Mechanisms for Embolic Stroke in Contralateral Hemispheres From Carotid Artery Sources

Journal of the American Heart Association: Cardiovascular and Cerebrovascular Disease, 2023
Background Disambiguation of embolus pathogenesis in embolic strokes is often a clinical challenge. One common source of embolic stroke is the carotid arteries, with emboli originating due to plaque buildup or perioperatively during revascularization ...
Ricardo Roopnarinesingh, Michelle Leppert, Debanjan Mukherjee   +2 more
doaj   +1 more source

Isolated left vertebral artery and its consequences for aortic arch repair

Journal of Vascular Surgery Cases and Innovative Techniques, 2019
A left vertebral artery (LVA) originating directly from the aortic arch is the second most common supra-aortic branching anomaly. This isolated LVA can also terminate in the posterior inferior cerebellar artery without contributing to the circle of ...
Emma van der Weijde, MD, Olaf J. Bakker, MD, PhD, Uday Sonker, MD, Robin H. Heijmen, MD, PhD   +3 more
doaj   +1 more source

Arterial Blood Supply to the Cerebral Arterial Circle in the Selected Species of Carnivora Order from Poland

Animals, 2023
Carnivores are a wide, diverse group of mammals whose representatives live all over the world. The study presents the results of the analysis of the arterial vascularization of the blood supply to the cerebral arterial circle of selected species in the ...
Maciej Zdun, Jakub Jędrzej Ruszkowski, Aleksander F. Butkiewicz, Maciej Gogulski   +3 more
doaj   +1 more source

Hyperhomocysteinemia induced by excessive methionine intake promotes rupture of cerebral aneurysms in ovariectomized rats. [PDF]

, 2016
BackgroundHyperhomocysteinemia (HHcy) is associated with inflammation and a rise in the expression of matrix metalloproteinase-9 (MMP-9) in the vascular wall.
Hashimoto, Tomoki, Kanematsu, Yasuhisa, Kitazato, Keiko T, Korai, Masaaki, Matsushita, Nobuhisa, Miyamoto, Takeshi, Nagahiro, Shinji, Satomi, Junichiro, Shimada, Kenji, Tada, Yoshiteru   +9 more
core   +2 more sources

Anatomical Variations in Circle of Willis in Patients Undergoing CT Cerebral Angiography in a Tertiary Hospital in Nepal: A Descriptive Cross-sectional Study

Journal of Nepal Medical Association, 2020
Introduction: Variation in Circle of Willis is a commonly encountered entity in patients undergoing computed tomography angiography, identification of which is crucial in the management of patients with vascular pathologies.
Prajwal Dhakal, Prakash Kayastha, Sharma Paudel, Sundar Suwal, Mohan Raj Sharma, Ram Kumar Ghimire   +5 more
doaj   +1 more source

Angiography Analysis of Variations of the Posterior Segment of the Circle of Willis

Biomolecules & Biomedicine, 2005
Cerebral-vascular diseases present one of the leading problems of the modern mankind. They are followed by the risk of high mortality rate, and as such cause high level of disability with people who survive cerebral-vascular incident (stroke, apoplexy).
Alma Voljevica, Amela Kulenović, Eldan Kapur, Ilvana Vučković   +3 more
doaj   +1 more source

Are the distributions of variations of circle of Willis different in different populations? – Results of an anatomical study and review of literature [PDF]

, 2006
Background: Previous studies have proposed correlation between variants of the cerebral arterial circle (also known as circle of Willis) and some cerebrovascular diseases.
Behzad Eftekhar, Majid Dadmehr, Saeed Ansari, Mohammad Ghodsi, Bashir Nazparvar, Ebrahim Ketabchi, RD Henderson, AW Hoksbergen, T Horikoshi, KN Kayembe, ML Flaherty, GJ Nogueira, B Ramamurthi, SC So, CH Tay, H White, A El Khamlichi, K Kapoor, DH Kim, BJ Alpers, AG Baptista, G Caruso, E Fawcett, HE Riggs, JJ Van Overbeeke, H VanderEecken, B Windle, A El Khamlichi, CM Fisher, B Hillen, G Lazorthes, AW Hoksbergen, AL Rhoton, C Macchi, G Piganiol, WE Stehbens, Z Milenkovic, L Vasovic, K Kapoor, A Puchades-Orts   +39 more
core   +2 more sources

A complex abnormality of the circle of Willis. Case presentation [PDF]

Romanian Journal of Neurology, 2012
Objective. We report a case of a patient with medium ACI stenosis and border zone infarct that occurred under normal hemodynamic conditions (normal BP, sinus rhythm), as normal supply mechanisms through the circle of Willis were absent.
Monica Sabau, Alexandra Comanescu, Ioana Popa   +2 more
doaj   +1 more source