Intracranial Stenoses and Occlusions, and Circle of Willis Collaterals

2006 ◽  
pp. 117-126 ◽  
Author(s):  
Ralf W. Baumgartner
Keyword(s):  
Circle Of Willis

Carotid endarterectomy in patients with foetal-type posterior circle of Willis: Is there an indication for local anaesthesia?

VASA ◽  
2011 ◽  
Vol 40 (5) ◽  
pp. 404-407
Author(s):  
Maras ◽  
Tzormpatzoglou ◽  
Papas ◽  
Papanas ◽  
Kotsikoris ◽  
...  
Keyword(s):  
Carotid Endarterectomy ◽  
Local Anaesthesia ◽  
Anatomical Variation ◽  
Anatomical Variations ◽  
Circle Of Willis ◽  
Variable Degree ◽  
Operative Complications ◽  
The Right ◽  
Ica Stenosis ◽  
Symptomatic Stenosis

Foetal-type posterior circle of Willis is a common anatomical variation with a variable degree of vessel asymmetry. In patients with this abnormality, carotid endarterectomy (CEA) may create cerebral hypo-perfusion intraoperatively, and this may be underestimated under general anaesthesia. There is currently no evidence that anatomical variations in the circle of Willis represent an independent risk factor for stroke. Moreover, there is a paucity of data on treating patients with such anatomical variations and co-existing ICA stenosis. We present a case of CEA under local anaesthesia (LA) in a 52-year-old female patient with symptomatic stenosis of the right ICA and coexistent foetal-type posterior circle of Willis. There were no post-operative complications and she was discharged free from symptoms. She was seen again 3 months later and was free from complications. This case higlights that LA should be strongly considered to enable better intra-operative neurological monitoring in the event of foetal-type posterior circle of Willis.

Dedicated head-neck coil in MR angiography of the supra-aortic arteries from the aortic arch to the circle of willis

1998 ◽  
Vol 39 (3) ◽  
pp. 249-256 ◽  
Author(s):  
M. Strotzer ◽  
C. Fellner ◽  
S. Fraunhofer ◽  
J. Gmeinwieser ◽  
H. Albrich ◽  
...  
Keyword(s):  
Aortic Arch ◽  
Mr Angiography ◽  
Circle Of Willis ◽  
Neck Coil ◽  
Head Neck

scholarly journals Hyperhomocysteinemia in a Patient with Moyamoya Disease

2018 ◽  
Vol 2018 ◽  
pp. 1-3
Author(s):  
Durga Shankar Meena ◽  
Gopal Krishana Bohra ◽  
Mahadev Meena ◽  
Bharat Kumar Maheshwari
Keyword(s):  
Cerebrovascular Disease ◽  
Moyamoya Disease ◽  
Cerebral Angiography ◽  
Rare Case ◽  
Homocysteine Level ◽  
Case Reports ◽  
Circle Of Willis

Moyamoya disease is a chronic progressive cerebrovascular disease characterized by bilateral occlusion or stenosis of arteries around circle of Willis. We report a case of 18-year-old female presented with recurrent episodes of headache and vertigo. On cerebral angiography, the patient was diagnosed to have moyamoya disease. On further evaluation, thrombophilia profile showed increased homocysteine level. The patient was treated conservatively with cobalamin and aspirin and advised for revascularization. According to the literature, there are few case reports of moyamoya disease with thrombotic disorders. Hence, we are reporting this interesting and rare case.

‘To unlock the secret places of Man’s Mind’.1 Thomas Willis (1621–1675)

2021 ◽  
pp. 096777202110007
Author(s):  
Penelope Hunting
Keyword(s):  
Medical Practice ◽  
Natural Philosophy ◽  
Circle Of Willis ◽  
High Street ◽  
The Brain

Thomas Willis was born four hundred years ago on 27 January 1621 in Wiltshire. He has been dubbed ‘the father of neurology’ and is remembered for the Circle of Willis at the base of the brain. Young Thomas was educated at Oxford as a schoolboy and undergraduate. From 1646 he practised medicine and studied chemistry; he joined the Oxford Experimental Philosophical Club, and was Sedleian Professor of Natural Philosophy from 1660. He established a prosperous medical practice at The Angel on Oxford High Street, and achieved international acclaim for Cerebri anatome (1664). Lured to London in 1667, Willis lived in style but attended the sick poor on Sundays and worshipped twice daily at St Martin-in-the-Fields.

scholarly journals “Hands” teaching method in Circle of Willis: A useful model

2021 ◽  
Author(s):  
Yang Zhao ◽  
Ningde Shu ◽  
Qingxin Liu ◽  
He Jiang
Keyword(s):  
Teaching Method ◽  
Circle Of Willis

Circle of Willis: evaluation with spiral CT angiography, MR angiography, and conventional angiography.

Radiology ◽  
1995 ◽  
Vol 195 (2) ◽  
pp. 445-449 ◽  
Author(s):  
D A Katz ◽  
M P Marks ◽  
S A Napel ◽  
P M Bracci ◽  
S L Roberts
Keyword(s):  
Ct Angiography ◽  
Mr Angiography ◽  
Spiral Ct ◽  
Circle Of Willis ◽  
Conventional Angiography ◽  
Spiral Ct Angiography

scholarly journals Age dependence of critical pressure in the segments and branches of the circle of Willis

2017 ◽  
Vol 51 (2) ◽  
pp. 146-148 ◽  
Author(s):  
Adam Piechna ◽  
Leszek Lombarski ◽  
Paweł Krajewski ◽  
Bogdan Ciszek ◽  
Krzysztof Cieslicki
Keyword(s):  
Critical Pressure ◽  
Circle Of Willis ◽  
Age Dependence

A MATHEMATICAL MODEL OF ANEURYSM OF CIRCLE OF WILLIS

1995 ◽  
Vol 03 (03) ◽  
pp. 653-659 ◽  
Author(s):  
J. J. NIETO ◽  
A. TORRES
Keyword(s):  
Differential Equation ◽  
Mathematical Model ◽  
Ordinary Differential Equation ◽  
Blood Flow ◽  
Nonlinear Analysis ◽  
Existence Of Solutions ◽  
Circle Of Willis ◽  
Second Order ◽  
Qualitative Properties

We introduce a new mathematical model of aneurysm of the circle of Willis. It is an ordinary differential equation of second order that regulates the velocity of blood flow inside the aneurysm. By using some recent methods of nonlinear analysis, we prove the existence of solutions with some qualitative properties that give information on the causes of rupture of the aneurysm.

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