scholarly journals Demographic age-related variation in Circle of Willis completeness assessed by digital subtraction angiography

2020 ◽  
Vol 6 (1) ◽  
pp. 31 ◽  
Author(s):  
CiaránJ Powers ◽  
RyanG Eaton ◽  
VarunS Shah ◽  
David Dornbos III ◽  
OrelA Zaninovich ◽  
...  
Keyword(s):  
Digital Subtraction Angiography ◽  
Circle Of Willis ◽  
Digital Subtraction ◽  
Related Variation ◽  
Age Related

scholarly journals Digital Subtraction Angiographic Study of Circle of Willis in Indian Population in a Tertiary Super-Specialty Hospital

2018 ◽  
Vol 3 (2) ◽  
pp. 99-105
Author(s):  
Muhammad Abdul Momen Khan ◽  
Shakir Husain ◽  
Md Shohidul Islam ◽  
Md Amir Hossain
Keyword(s):  
Digital Subtraction Angiography ◽  
Cerebrovascular Disorders ◽  
Clinical Importance ◽  
Uttar Pradesh ◽  
Anatomical Variations ◽  
Circle Of Willis ◽  
Anterior Communicating Artery ◽  
Digital Subtraction ◽  
Anterior Circulation ◽  
Cross Sectional

Background: Circle of Willis is an anastomotic polygon at the base of the brain which forms an important collateral network to maintain adequate cerebral perfusion. Changes in the normal morphology of the circle may causes the appearance and severity of symptoms of cerebrovascular disorders, such as aneurysms, infarctions and other vascular anomalies.Objectives: The aim of the present study was to analyses the anatomical variations of the circle of Willis by observing the variations in the cerebral arterial circle and was to clarify the clinical importance of these variations in certain forms of cerebrovascular diseases.Methodology: This cross-sectional study was conducted in the department of Neurointervention of Max Super-speciality Hospital, New Delhi, India and Neo multispeciality Hospital, Noida, Uttar Pradesh (UP), India during July 2016 to December 2016 for a period of six (6) months. Patients who were admitted in the Neurointervention department for digital subtraction angiography (DSA) were included in this study. The circle of Willis was then analyzed with the special reference to the complete or incomplete circle, any asymmetry in the configuration and variations in the size, and number of the component vessels, circle with multiple anomalies and absence, fenestration, duplication or triplication of any of the vessels.Results: Morphology and variations of the circle of Willis were studied in 74 patients undergone digital subtraction angiography (DSA). The normal pattern of circle of Willis was observed in 40(54.06%) cases and the remaining 34(45.94%) cases had one or more variations; however, 24(70.58%) cases had variations in the anterior circulation and 10(29.42%) cases had variations in the posterior circulation. 17(50%) cases had variations on the right side compared to 13(38.24%) variations on the left side. 4(11.76%) cases had variations in the anterior communicating artery. Incomplete circle of Willis were found 12(35.28%) cases. Multiple variations were observed in 11 cases (32.35%) in this study. In 4 cases anterior communicating artery aneurysms were observed.Conclusion: Variation of circle of Willis is common in this study of Indian population.Journal of National Institute of Neurosciences Bangladesh, 2017;3(2): 99-105

scholarly journals Echo-Enhanced Transcranial Color Coded Duplexsonography versus Digital Subtraction Angiography for Diagnosis of Intracranial Vascular Diseases

Stroke ◽  
2001 ◽  
Vol 32 (suppl_1) ◽  
pp. 340-340
Author(s):  
Alexander Kunz
Keyword(s):  
Digital Subtraction Angiography ◽  
Cerebral Arteries ◽  
Vascular Diseases ◽  
Flow Patterns ◽  
Circle Of Willis ◽  
Collateral Flow ◽  
Digital Subtraction ◽  
Diagnostic Efficacy ◽  
Basilar Artery Thrombosis ◽  
Cerebrovascular Symptoms

P7 Objective: To assess the diagnostic efficacy of echo-enhanced transcranial color coded duplexsonography (eTCCD) for noninvasive evaluation of the intracranial vasculature in patients with cerebrovascular symptoms. MATERIAL AND METHODS: We prospectively evaluated 35 consecutive patients (10 women, 25 men, mean age 58,8 ± 9,7) with eTCCD (galactose palmitic acid based echo-enhancing agent) and digital subtraction angiography (DSA). All patients were admitted to our neurology department for acute onset of cerebrovascular symptoms. RESULTS: In 34/35 patients eTCCD visualized the circle of Willis. In 15/17 patients with critical symptomatic internal carotid artery obstruction (lumen diameter reduction of >85% or occlusion) eTCCD correctly identified collateral flow patterns through the circle of Willis. DSA and eTCCD showed MCA-occlusion in 4 patients. In one of these patients eTCCD correctly identified a contralateral severe MCA-stenosis, which was first missed by DSA but confirmed by angiographic reevaluation. In 1 patient eTCCD missed occlusion of a M3-segment. In 2/3 patients eTCCD showed intracranial ICA-stenosis. In 3 patients with symptoms suggestive for basilar artery thrombosis DSA and eTCCD showed severe basilar stenosis in 1 patient and intracranial vertebral artery occlusion in 2 patients. DSA and eTCCD were normal in 3 patients with atypical intracranial hemorrhages and in 1 patient with subarachnoid hemorrhage. In another patient eTCCD correctly suggested a left parietooccipital AVM. DSA and eTCCD were normal in 4 other patients. CONCLUSION: eTCCD reliably detects occlusion, stenosis and collateral flow patterns of the basal cerebral arteries in patients with cerebral ischemia. For patients with cerebral hemorrhage our data are limited.

Accuracy of CT angiography in the assessment of the circle of Willis: comparison of volume-rendered images and digital subtraction angiography

2011 ◽  
Vol 52 (8) ◽  
pp. 889-893 ◽  
Author(s):  
Ari Han ◽  
Dae Young Yoon ◽  
Suk Ki Chang ◽  
Kyoung Ja Lim ◽  
Byung-Moon Cho ◽  
...  
Keyword(s):  
Digital Subtraction Angiography ◽  
Ct Angiography ◽  
Circle Of Willis ◽  
Digital Subtraction

scholarly journals Planning-free cerebral blood flow territory mapping in patients with intracranial arterial stenosis

2016 ◽  
Vol 37 (6) ◽  
pp. 1944-1958 ◽  
Author(s):  
Daniel F Arteaga ◽  
Megan K Strother ◽  
L Taylor Davis ◽  
Matthew R Fusco ◽  
Carlos C Faraco ◽  
...  
Keyword(s):  
Blood Flow ◽  
Cerebral Blood Flow ◽  
Digital Subtraction Angiography ◽  
Gold Standard ◽  
Arterial Spin Labeling ◽  
Spin Labeling ◽  
Circle Of Willis ◽  
Atherosclerotic Disease ◽  
Digital Subtraction ◽  
Intracranial Atherosclerotic Disease

A noninvasive method for quantifying cerebral blood flow and simultaneously visualizing cerebral blood flow territories is vessel-encoded pseudocontinuous arterial spin labeling MRI. However, obstacles to acquiring such information include limited access to the methodology in clinical centers and limited work on how clinically acquired vessel-encoded pseudocontinuous arterial spin labeling data correlate with gold-standard methods. The purpose of this work is to develop and validate a semiautomated pipeline for the online quantification of cerebral blood flow maps and cerebral blood flow territories from planning-free vessel-encoded pseudocontinuous arterial spin labeling MRI with gold-standard digital subtraction angiography. Healthy controls (n = 10) and intracranial atherosclerotic disease patients (n = 34) underwent 3.0 T MRI imaging including vascular (MR angiography) and hemodynamic (cerebral blood flow-weighted arterial spin labeling) MRI. Patients additionally underwent catheter and/or CT angiography. Variations in cross-territorial filling were grouped according to diameters of circle of Willis vessels in controls. In patients, Cohen’s k-statistics were computed to quantify agreement in perfusion patterns between vessel-encoded pseudocontinuous arterial spin labeling and angiography. Cross-territorial filling patterns were consistent with circle of Willis anatomy. The intraobserver Cohen's k-statistics for cerebral blood flow territory and digital subtraction angiography perfusion agreement were 0.730 (95% CI = 0.593–0.867; reader one) and 0.708 (95% CI = 0.561–0.855; reader two). These results support the feasibility of a semiautomated pipeline for evaluating major neurovascular cerebral blood flow territories in patients with intracranial atherosclerotic disease.

Sign in / Sign up

Export Citation Format

Share Document