Search Results
Results 201 - 250 of 1903
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Yu Wengui - - 2009
BACKGROUND AND PURPOSE: Thrombosis of the cerebral venous sinus may cause venous congestion, cerebral edema, and infarction. The role of cerebrovenous disorders in arterial ischemic stroke is unknown. The objective of this study was to examine the contribution of ipsilateral cranial venous abnormalities to the development of cerebral edema in ...
Lim C C Tchoyoson - - 2009
BACKGROUND: Drug users who crush, dissolve, and inject buprenorphine tablets parenterally may be at risk of severe thromboembolic complications or death. We describe patients with neurologic complications after injecting buprenorphine tablets. METHODS: Brain MRI including diffusion-weighted imaging (DWI) in patients admitted to the neurologic department after injecting buprenorphine tablets were ...
Sharma Vijay K - - 2010
Establishing the mechanism of ischemia in patients with cerebrovascular ischemia is important in determining prognosis as well as the therapeutic approach. Recurrent transient ischemic attacks in a patient with accessory middle cerebral artery described by Gao et al. pose important questions. The underlying mechanisms responsible for cerebral ischemia remain unclear. ...
Eldawoody Hany - - 2009
Establishing a simple and comprehensive experimental model is one of the most important issues in the study of cerebral aneurysms. Previous models in the rat required two stage surgeries and observations were limited to a few branching sites. The present study aimed to introduce a simplified model in rats and ...
Fabiano Andrew J - - 2010
OBJECTIVES: A serious catastrophic complication of endoscopic third ventriculostomy (ETV) is basilar artery (BA) damage. Although the BA has been discussed as the cause of haemorrhage and even pseudoaneurysm, variations of the posterior cerebral artery proximal segment (P1) and its protrusion into the third ventricle floor have not been emphasised. ...
Pappad? G - - 2009
AIM: The purpose of this work is to evaluate if the asymmetry of venous outflow between the two hemispheres is a reliable criterion of impairment of the cerebral vascular reserve among symptomatic patients harbouring a spontaneous atherosclerotic occlusion of internal carotid artery. METHODS: From January 1995 to December 2007, 7 ...
Duque Francisco J - - 2009
Insonation of Circle of Willis by transcranial Doppler duplex color sonography is described in 30 healthy dogs with 15 weighing < 33 lb and 15 weighing >33 lb. Imaging was via a temporal window to explore the rostral, middle, and caudal cerebral arteries on both the left and right-hand sides; ...
Bearden Scott - - 2009
We report four cases of cerebral hemodynamic compromise identified over a five year period. Cerebral hemodynamic compromise is characterized by reversible attacks of regional cerebral ischemia affecting patients with occlusive disease of main arteries supplying blood to the brain. All four of our patients had occlusion of one internal carotid ...
Nakae Ryuta - - 2009
CREST syndrome is a variant of scleroderma characterized by calcinosis, Raynaud's phenomenon, esophageal hypomotility, sclerodactyly, and telangiectasia, and is a collagen vascular disease characterized by inflammation and fibrosis of multiple organs/tissues. Neurological and cerebrovascular abnormalities are uncommon in CREST syndrome. Here, we report two patients with CREST syndrome harboring intracranial ...
Majoie C B CB Department of Radiology, Academic Medical Center, University of Amsterdam, The Netherlands - - - 2009
We describe the case of a patient with an aneurysm of the P2 segment of the PCA with a persistent anastomosis between the posteromedial choroidal artery and the P3 segment of the posterior cerebral artery.
Numata Satoshi - - 2009
BACKGROUND: Antegrade cerebral perfusion is one of the most reliable methods of organ protection during hypothermic circulatory arrest for aortic arch surgery. We used a simplified antegrade cerebral perfusion technique with low mortality and morbidity. METHODS: Between January 2005 and August 2008, 21 patients underwent aortic arch surgery with unilateral ...
Shimamura Norihito - - 2009
We developed a novel trans-femoral artery approach to the rat middle cerebral artery occlusion model (TF-MCAO) without sacrificing the external carotid artery (ECA) with/without the pterygopalatine artery, which is important for chewing food. To make the TF-MCAO we first dissect the left common carotid artery (CCA), ECA, and internal carotid ...
Manninen Hannu - - 2009
PURPOSE: To evaluate the prevalence of anatomical variations in the circle of Willis predisposing to cerebral ischemia during intraoperative closure of a carotid artery. MATERIALS: Anatomy of the cerebral arteries of 92 deceased was assessed by angiography and permanent silicone casts. Cerebral ischemia during closure of a carotid artery with ...
Cebral Juan R - - 2009
Detailed knowledge of the hemodynamic conditions in normal cerebral arteries is important for a better understanding of the underlying mechanisms leading to the initiation and progression of cerebrovascular diseases. Information about the baseline values of hemodynamic variables such as wall shear stresses is necessary for comparison to pathological conditions such ...
Castaño C C Interventional Neuroradiology Unit, Department of Neurosciences, Hospital Universitari Germans Trias i Pujol; Badalona, Barcelona, Spain - - - 2009
The Merci Retrieval System (TM) (Concentric Medical, Mountain View, CA, USA) was approved in 2004 for restoring blood flow in patients experiencing an acute stroke who are otherwise ineligible for intravenous tPA, or in whom intravenous tPA treatment has failed. However, this treatment results in successful recanalization in less than ...
Lim Mi-Hye - - 2009
BACKGROUND AND PURPOSE: A pulsatility index (PI) represents vascular resistance distal to an examined artery. The purpose of the present study was to evaluate an association between plasma total homocysteine (tHcy) and PIs of the cerebral arteries in patients with ischemic stroke. METHODS: Consecutive patients with ischemic stroke referred to ...
Ryu Ju Seok - - 2009
Cerebral artery occlusion in childhood, particularly in the posterior circulation, is a rare neurological complication of Mycoplasma pneumoniae infection. A genetic defect in the methylenetetrahydrofolate reductase gene could result in hyperhomocysteinemia and increased risk of stroke. We report a patient with posterior cerebral artery occlusion after Mycoplasma pneumoniae infection associated ...
Wong George K C - - 2009
BACKGROUND: Use of virtual reality planning and rehearsal for planning and training of cerebral aneurysm clipping was recently reported. We aimed to illustrate its applications in preoperative planning and training for cerebral AVM excision. CASE DESCRIPTION: We illustrated the application of preoperative rehearsal for excision of cerebral AVM for 2 ...
De Silva K Ranil D - - 2009
To determine the extent of hypoplasia of the component vessels of the circle of Willis (CW) and the anatomical variations in the anterior communicating artery (AcomA) in the subjects who have died of causes unrelated to the brain and compare with previous autopsy studies. The external diameter of all the ...
Jackman Katherine A - - 2009
Angiotensin II (Ang II) receptor blockade is beneficial in stroke, possibly due to attenuation of vascular oxidative stress. Mice genetically targeted for the superoxide-forming vascular NADPH oxidase subunit, NOX1, have a blunted hypertensive response to Ang II. We therefore hypothesised that NOX1 is mechanistically involved in Ang II-induced superoxide production ...
Rudolph James L JL Geriatric Research, Education, and Clinical Center, Boston, MA 02130, USA. - - 2009
Carotid stenosis is a frequent coexisting condition in patients undergoing coronary artery bypass graft (CABG) surgery. The impact of carotid stenosis on cerebral perfusion is not fully understood. The purpose of this study was to determine the impact of carotid stenosis on cerebral blood flow velocity in patients undergoing CABG. ...
Ohtomo Satoru - - 2009
OBJECTIVE: Temporo-parietal theta activity (TPTA), often detected in hemispheres with internal carotid (ICA) or middle cerebral artery (MCA) occlusive lesions, is more clearly separated from occipital alpha activity by magnetoencephalography (MEG) than electroencephalography. The present study investigated whether TPTA is correlated with misery perfusion, a surgically correctable type of hemodynamic ...
Nakamura Mitsunobu - - 2009
OBJECT: Encephalomyosynangiosis (EMS) is a surgical treatment for moyamoya disease that is widely used to provide increased intracranial blood flow via revascularization by arterial anastomosis from the external carotid artery. However, the angiogenic mechanism responsible for the revascularization induced by EMS has not been systematically evaluated. In this study the ...
Sheikh Kiran - - 2009
OBJECTIVE: The purpose of this study was to determine whether the superficial temporal artery as a surrogate arterial input function, compared with the anterior cerebral artery as the arterial input function, generates accurate perfusion CT maps with significant correlates for cerebral blood flow, cerebral blood volume, and mean transit time. ...
Koo Young-Ho - - 2009
Cerebral embolic infarction is the most common neurologic complication of cardiac myxoma (CM). Development of cerebral aneurysms in CM is very rare. We present a 64-year-old woman with acute cerebral infarction and multiple cerebral aneurysms complicated by CM. The aneurysms were multiple, fusiform-shaped, and located in distal branch of major ...
Kim Joon-Tae - - 2009
Cerebral lipiodol embolism is a rare complication of transcatheter arterial chemoembolization (TACE). Its pathological mechanism remains ambiguous despite several investigations. In Case 1, a 67-year-old man with hepatocellular carcinoma (HCC) experienced neurological deficits soon after undergoing a fourth session of TACE. Computed tomography (CT) scan showed multiple hyperdense lesions along ...
Kruse Lars S - - 2009
Activation of the trigeminovascular pain signalling system, including cerebral arteries, meninges, trigeminal ganglion, and brain stem, is involved in migraine. Furthermore, stimulation of cyclic nucleotide (cAMP and cGMP) production as well as inhibition of phosphodiesterases (PDEs) induces headache and migraine. In order to investigate the possible role of PDE in ...
Hayashi Yasuhiko - - 2009
A 30-year-old man presented with a history of several convulsive episodes. A CT scan showed a calcified focus in the right temporal lobe. Cerebral angiography yielded no abnormal findings. At craniotomy, the M3 portion of the middle cerebral artery was found to terminate with a blind end at the junction ...
Tsai Sheng-Tzung - - 2009
Most recent studies on the effectiveness of cerebral revascularization have focused on the treatment of atherosclerotic internal carotid artery occlusive disease. The goal of the present study was to assess neurological function in 11 severe atherosclerotic middle cerebral artery (MCA) disease patients with transient ischemic attacks (TIAs) and hemodynamic compromise ...
Agostoni Elio - - 2009
The alterations of the cerebral venous circulation are a rare but clinically important cause of headache. Although any process involving the cerebral veins or sinuses may cause headache, the most frequent and important are cerebral venous thrombosis and idiopathic intracranial hypertension. The headache of cerebral venous thrombosis does not have ...
Idicula Titto T - - 2009
INTRODUCTION: Some stroke patients present with mild or absent measurable neurologic deficits in spite of a significant thromboembolic event. A thrombus in the distal region of the middle cerebral artery may have such a presentation. CT angiography in the acute phase helps to identify the culprit thrombus. Thrombolysis might be ...
Boongird Atthaporn - - 2009
Study the normal anatomical and variation of the recurrent artery of Heubner (RAH) in fifty Thai cadaveric brains were studied under operating microscope. The anterior communicating artery (ACoA) located at the orbital surface of gyrus rectus about 50% and medial surface of gyrus rectus about 50%. The recurrent artery of ...
Kim Myoung Soo - - 2009
Although there are several descriptions of this vessel, there is no detailed angiographic study of the accessory middle cerebral artery (AMCA) in Korea. We describe the angiographic characteristics of the cortical territory and origin of AMCA and discuss the clinical significance of this anomaly. We searched for patients with AMCAs ...
Serarslan Yurdal - - 2009
During the dissection of a posterior fossa in a cadaveric head, we found a solitary superior vermian artery (VA) originating from the posterior cerebral artery (PCA). On the right side, the VA arose from the precommunicating segment of the PCA. The VA distributed by giving off some branches to the ...
Baaj Ali A - - 2009
Moyamoya disease (MMD) is a progressive, occlusive disease of the distal internal carotid arteries associated with secondary stenosis of the circle of Willis. Symptoms include ischemic infarcts in children and hemorrhages in adults. Bypass of the stenotic vessel(s) is the primary surgical treatment modality for MMD. Superficial temporal artery-to-middle cerebral ...
Vasović Ljiljana - - 2009
OBJECT: The authors describe some of the features of the medial striate branch or recurrent artery of Heubner (RAH). This structure has indisputable functional, neurological, and neurosurgical significance, and originates from the A(1) and/or A(2) segments of the anterior cerebral artery. METHODS: Microdissection of 94 human fetal specimens was performed. ...
Rangappa Pradeep - - 2009
We report the case of a 50-year-old woman undergoing elective endoscopic retrograde cholangiopancreatography, who developed coma and hemiparesis secondary to severe cerebral artery gas embolism. Despite prompt diagnosis and early hyperbaric oxygen therapy (HBO(2)) she developed severe cerebral edema and died within 24 h.
Rizzoni Damiano - - 2009
OBJECTIVE: Structural alterations in the microcirculation may be considered an important mechanism of organ damage. An increased media-to-lumen ratio of subcutaneous small resistance arteries has been demonstrated to predict the development of cardiocerebrovascular events in hypertensive patients. Alterations in the structure of small cerebral arteries have been demonstrated in animal ...
Hendrikse Jeroen - - 2009
BACKGROUND AND PURPOSE: The perfusion territories of the brain-feeding arteries are difficult to assess in vivo and therefore standard cerebral perfusion territory templates are often used to determine the relation between cerebral infarcts and the feeding vasculature. In the present study, we compared this infarct classification, using standard templates, with ...
Christian Brett A - - 2009
Unenhanced head CT has become the first line imaging study in the evaluation of suspected acute cerebral ischemia. It is important to identify subtle findings of acute ischemia on this exam to direct appropriate patient management. Summary of Case- We report the first case of multiple pial surface distal internal ...
Capitani Erminio - - 2009
In this study we analysed the relationship between damage in the territory of the posterior cerebral artery and semantic knowledge, with special reference to category dissociations. Twenty-eight posterior cerebral artery stroke patients (18 left, 8 right and 2 bilateral posterior cerebral artery infarctions) completed a neuropsychological battery aimed at assessing ...
Liu Yi-Chien - - 2009
Middle cerebral artery dissection (MCAD) is a rare cause for ischemic stroke and is often associated with headache and hemispheric symptoms. In the present report, limb shaking is found to be a major symptom of spontaneous MCAD in a young male. The diagnosis of MCAD is based on the intramural ...
Hong Ji Man - - 2010
BACKGROUND: We assess the feasibility of using the newly designed suboccipital probe fixation device (SPFD) as a convenient and reliable tool for simultaneous measurement of vasomotor reactivity (VMR) in the middle cerebral artery (MCA) and basilar artery (BA). METHODS: We analyzed 30 healthy volunteers' VMR values by using both SPFD ...
Brus-Ramer Marcel - - 2010
BACKGROUND AND PURPOSE: Hyperperfusion is a rare but serious complication following cerebrovascular angioplasty and stent placement. Radiographically identifying hyperperfusion before the development of severe sequelae is difficult, as few diagnostic criteria have been established. METHODS: A 50-year-old woman, initially presenting with 6 weeks of right-sided hemiparesis and dysarthria, was treated ...
Yoshimura S - - 2009
The frontal bone window (FBW) is a promising approach in evaluating the anterior cerebral artery. The goal of the present study was to determine the rates of detection of the basal cerebral arteries by using the FBW alone and a combination of the FBW with the temporal bone window (TBW) ...
Shinn S H - - 2009
Left cardiac myxoma and consecutive embolization into the brain is well documented, whereas the association of myxoma with multiple fusiform cerebral aneurysms is rare. A 48-year old female with chronic renal failure had complained of syncope after receiving hemodialysis. An echocardiogram showed a 3 x 4 cm sized myxoma and ...
Meng He H Department of Neurology, University of Michigan Medical School, Ann Arbor, MI 48109-5622, - - 2009
Visualization of the cerebral vascular tree is important in experimental stroke and cerebral vascular malformation research. We describe a simple method, nuclear contrast angiography, that enables simultaneous visualization of the arterial tree and cerebral endothelial cells in rodent brain whole mounts. A mixture of latex and black ink was injected ...
Fellgiebel A - - 2009
BACKGROUND: Neurologic hallmarks of Fabry disease (FD) include small fiber neuropathy as well as cerebral micro- and macroangiopathy with premature stroke. Cranial MRI shows progressive white matter lesions (WML) at an early age, increased signal intensity in the pulvinar, and tortuosity and dilatation of the larger vessels. To unravel the ...
Maffei P - - 2009
We report a case of ischemic stroke in a 43 year-old woman with no traditional cardiovascular risk factors and a history of cranial surgery and cranial radiation therapy (CRT) for a GH-secreting pituitary macroadenoma. The neurological work-up on this patient disclosed several cerebral ischemic lesions and demonstrated the occlusion of ...
Gielecki Jerzy - - 2009
The morphometrical and volumetrical changes of the middle cerebral artery (MCA) during the fetal period of development were analyzed by digital-image analysis system (DIAS). Examinations were performed on 304 MCAs from 152 brains of human fetuses ranging from the 12th to 40th weeks of gestation. MCAs were analyzed with respect ...
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