Search Results
Results 301 - 350 of 1910
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Krishnan Kartik G - - 2008
OBJECTIVE: To describe a new technique of suturing microvessels with persistent perfusion via a temporary intraluminal microshunt. METHODS: Experiments were conducted in Wistar rats. Abdominal aorta grafts were explanted from donor rats. A soft silicon microcatheter was introduced into the lumen of this graft. The abdominal aorta of a recipient ...
Ii Yuichiro - - 2008
We report a 49-year-old woman with neuromyelitis optica (NMO) spectrum disorder coexisting with Sjögren's syndrome (SS). She presented with acute brainstem symptoms and transverse myelitis. Brain MRI showed focal high signal intensity lesions in the hypothalamus and the pontine tegmentum on T2-weighted and FLAIR images. MRA revealed stenotic changes of ...
Tutar Nihal Uslu - - 2008
We describe the features of a duplicated middle cerebral artery identified by computed tomographic angiography that originates from a previously undefined origin, ie, from the petrous portion of the internal carotid artery. Recognition of this anomaly is important in patients with a possible aneurysm, which was not present in our ...
Chang In Bok - - 2008
The authors report on a case of a metastatic choriocarcinoma that mimicked systemic necrotizing vasculitis on a cerebral angiogram. A 35-year-old woman presented with right hemiplegia and a drowsy mental state. A computed tomography (CT) scan revealed an intracerebral hemorrhage in the left frontal region. A cerebral angiogram showed multiple ...
Socci L - - 2008
The purpose of this work is to review the computational models of the adaptive behavior of the cerebral vascular wall aimed at simulating aneurysm formation and enlargement. Cerebral aneurysms are localized abnormal enlargements of the intracranial arterial vessels. The origin of this pathology is still unclear: however, aneurysm formation is ...
Immer Franz F - - 2008
BACKGROUND: We have shown that selective antegrade cerebral perfusion improves mid-term quality of life in patients undergoing surgical repair for acute type A aortic dissection and aortic aneurysms. The aim of the study was to assess the impact of continuous cerebral perfusion through the right subclavian artery on immediate outcome ...
Sakellaropoulos Antonios - - 2008
We present a rare case of hypoplasia of the vertebral arteries bilaterally, of the basilar artery, of the posterior cerebral arteries bilaterally, and right-sided aplasia of A1 branch of anterior cerebral artery. The patient became symptomatic with sudden-onset headaches, likely caused by high hemodynamic stress. The origin of the hypoplastic ...
El-Khouly Hatem - - 2008
OBJECTIVE: To define the arterial supply to the facial nerve that crosses the floor of the middle cranial fossa. METHODS: Twenty-five middle fossae from adult cadaveric-injected specimens were examined under 3 to 40x magnification. RESULTS: The petrosal branch of the middle meningeal artery is the sole source of supply that ...
Link Timothy E - - 2008
Cerebral vasospasm after subarachnoid hemorrhage (SAH) is a major contributor to mortality and morbidity after aneurysm rupture. Recently, R-type voltage-dependent Ca(2+) channel (VDCC) expression has been associated with increased cerebral artery constriction in a rabbit model of SAH. The goal of the present study was to examine whether the blood ...
Aoki Tomohiro - - 2008
Subarachnoid hemorrhage due to the rupture of a cerebral aneurysm is a life-threatening disease. Despite this, the detailed mechanisms underlying the initiation and progression of cerebral aneurysm are unclear. The relation of hypercholesterolemia and apolipoprotein E (ApoE) to cerebral aneurysm formation, has been unclear until now. We used, in the ...
Yoshioka Masakazu - - 2008
Most cases of thymic carcinoma have some invasion to neighboring organs when diagnosed, and it is generally difficult to completely remove. We adopted selective cerebral perfusion as a cerebral protection and successfully performed resection of a thymic adenocarcinoma that involved the superior vena cava, left brachiocephalic vein, right brachiocephalic artery ...
Shoja Mohammadali M - - 2008
The diencephalon, upper brain stem and other basal brain structures are supplied chiefly by penetrating branches of the cerebral arteries. We examined the retrochiasmatic space between the superior border of the pons and posterior edge of the optic chiasm in six randomly selected adult fresh brain specimens. Lateral or anterolateral ...
Desai Devang - - 2008
A 57-year-old male presented with right upper abdominal lump since 3 months. He was diagnosed to have a hepatic artery aneurysm. He was investigated thoroughly but no cause was found. He was subjected to endovascular embolisation of the aneurysm using endovascular coils. Subsequently the aneurysm was completely occluded. Hepatic artery ...
Pai R Shakuntala - - 2008
The knowledge of anatomical variations in hepatic artery are of importance to surgeons and radiologists while performing complicated procedures like liver transplantation and transarterial chemo-embolization for hepatic tumors. The incidence of accessory left hepatic artery is less common than the right accessory hepatic artery. Here we report an anomalous accessory ...
Wicker B K - - 2008
Much is known about cerebral vasospasm, a devastating sequela to ruptured intracranial aneurysms, yet underlying mechanisms remain unclear and clinical treatments have proven unsatisfactory. We have hypothesised that biochemical stimuli associated with the formation of extravascular blood clots dominate early maladaptive responses, leading to marked structural and functional changes in ...
Arivazhagan Arimappamagan - - 2009
BACKGROUND: Cerebral abscess commonly occurs secondary to trauma, hematogenous spread from distant infection, or otitis media. Pulmonary AVF is an uncommon cause of recurrent cerebral abscess and is often overlooked. We report 3 cases of cerebral abscesses secondary to pulmonary AVF. CASE DESCRIPTION: A 20-year-old man who presented with fever, ...
Barbato Joel E - - 2008
The use of a distal filter cerebral protection device with carotid artery stenting is commonplace. There is little evidence, however, that filters are effective in preventing embolic lesions. This study examined the incidence of embolic phenomenon during carotid artery stenting with and without filter use. This was a prospective, randomized, ...
Kocaeli H - - 2008
The rupture of an aneurysm into an arachnoid cyst and subdural space is unusual. A 25-year-old man was admitted 2 weeks after having undergone a burr hole drainage for a chronic subdural haematoma elsewhere. An angiogram revealed a small aneurysm at the bifurcation of the middle cerebral artery. The aneurysm ...
Shrestha Prabin - - 2008
It has already been proved by many studies that surgical revascularization definitely helps in curing the symptoms of moyamoya vasculopathy. In this regard, we present a case of moyamoya disease which was cured by concurrent multiple anastomotic procedures, namely superficial temporal artery (STA), middle cerebral artery (MCA) anastomosis, encephalomyosynangiosis (EMS) ...
Osborne-Bossert C - - 2008
Antegrade cerebral perfusion (ACP) has been demonstrated to be a safe and effective method of providing adequate protection to the brain during hypothermic circulatory arrest. By improving oxygen delivery to the cerebral capillaries, users of this technique have reported fewer temporary neurological deficits in postoperative periods, even after prolonged periods ...
Geevasinga Nimeshan - - 2008
We present a patient who became hemiparetic and drowsy 30 min after insertion of a carotid artery stent for severe (>80%) asymptomatic left common carotid artery stenosis. A carotid angiogram at this time showed widely patent vessels. Non-contrast head computed tomography showed a diffuse increase in signal intensity in the ...
Kleffner Ilka - - 2008
BACKGROUND AND PURPOSE: Some patients develop severe brain edema after complete middle cerebral artery occlusion, whereas others do not. Aquaporin-4 (AQP4) is the main water channel in the brain and has been shown to be critical for the development of brain edema after ischemia. We asked whether genetic variation in ...
Förster Alex - - 2008
The pathophysiology of cerebral ischemia in the borderzones between the large cerebral arteries has been the topic of considerable debate since this disease entity was defined in the first half of the twentieth century. Hemodynamic failure and microembolization were two seemingly mutually exclusive pathophysiological concepts that were proposed to explain ...
Gaudiello F - - 2008
BACKGROUND AND PURPOSE: Brain tissue viability depends on cerebral blood flow (CBF) that has to be kept within a narrow range to avoid the risk of developing ischemia. The aim of the study was to evaluate by 64-section CT (VCT) the cerebral perfusion modifications in patients with severe carotid stenosis ...
Rouhl R P W - - 2008
BACKGROUND AND PURPOSE: Virchow-Robin spaces (VRs) are perivascular spaces surrounding the deep perforating brain arteries. VRs dilatation is pathologic, and it could be a manifestation of cerebral small vessel disease. In the present study we assessed the relation between VRs and silent ischemic lesions in a cohort of patients with ...
Chan Kenny - - 2008
This paper describes the case of a 32-year-old man presenting with dense right hemiplegia and global aphasia caused by an acute left middle cerebral artery infarct that underwent successful endovascular therapy after being determined ineligible for intravenous tissue plasminogen activator. Clot transversion and balloon disruption followed by intra-arterial Alteplase resulted ...
Kim Seo Hyun - - 2008
Atherosclerosis may cause severe stenosis of the arteries supplying the brain, which induces chronic cerebral hypoperfusion. Although an infarction often occurs in this area, it is uncertain how brain vessels respond to the chronic hypoperfusion or how the vascular responses are related to stroke severity when the area has been ...
De Paulis Ruggero - - 2008
PURPOSE: The purpose of this study is to describe an intravessel cerebral shunt that allows perfusion of both cerebral hemispheres through the axillary artery. DESCRIPTION: The cerebral shunt is a 10-cm to 12-cm long cannula with a lumen for blood perfusion and two balloons, one at each distal end. The ...
Mourgela Sofia - - 2008
A case of a 61-year-old man with recurrent episodes of cerebral transient ischemic attacks is reported. The patient had a history of cigarette smoking, hypertension, hypercholesterolemia, and diabetes mellitus. Before these episodes, the patient had no clinical symptoms and signs of cerebral pathology. Brain magnetic resonance imaging revealed microvascular lesions ...
Urbanski Paul P - - 2008
OBJECTIVES: The aim of the study was to evaluate the role of anatomical completeness of the circle of Willis for sufficient brain perfusion during unilateral cerebral perfusion and the methodology of the preoperative and intraoperative functional assessments of adequate cross-perfusion. METHODS: This prospective observational study included all elective patients (99) ...
Saguchi Takayuki - - 2008
BACKGROUND AND PURPOSE: Transcranial ultrasound (TUS) enhances thrombolysis and is expected to be useful for the treatment of ischemic stroke. However, neither its effectiveness in improving neurologic outcome nor its safety in living tissue has been fully established. We examined the efficacy and safety of low-frequency TUS under appropriate conditions ...
Lasjaunias Pierre L - - 2008
BACKGROUND AND PURPOSE: The purpose of this article is to describe "cerebral proliferative angiopathy" (CPA) as a clinical entity, which may be regarded as separate from "classical" brain AVMs in angioarchitecture, natural history, clinical presentation, and, therefore, treatment and which can be discerned from other cerebral AVMs by characteristic imaging ...
Zhang Wen-hua WH Department of Neurosurgery, Brigham and Women's Hospital, Harvard Medical School, 221 Longwood Avenue, LMRC 113, Boston, MA 02115, - - 2008
Nortriptyline, an antidepressant, was identified as a strong inhibitor of mitochondrial permeability transition by our screening of a library of 1040 drugs. Because mitochondrial permeability transition and consequent mitochondrial dysfunction have been implicated in acute neuronal death, we proposed to investigate the possible neuroprotective effects of nortriptyline in cerebral ischemia. ...
Vicenzini Edoardo - - 2008
BACKGROUND: Erectile dysfunction (ED) is not only evidence of diffuse atherosclerosis but also an index of early endothelial damage. We investigated cerebrovascular reactivity, expression of early arterial damage, in patients with isolated ED (ED+) and controls (ED-). MATERIALS AND METHODS: Fifteen ED+ and 15 ED- subjects, matched for age (ED+: ...
Vilela Marcelo D - - 2008
OBJECT: The aim of this study was to review the historical developments and current status of superficial temporal artery (STA) to middle cerebral artery (MCA) bypass. METHOD: A literature review was performed to review the origins and current uses of the STA bypass procedure in neurosurgery. RESULTS: The idea of ...
Menezes Brian F - - 2008
Simultaneous bilateral cerebrovascular infarction is relatively rare and its initial presentation as a space-occupying lesion is extremely uncommon. However, bilateral infarction can result from unilateral occlusion of anomalous cerebral vasculature. We report the case of a man presenting with lower limb weakness and aphasia of acute onset with initial computerised ...
Ardakani Shahab Kamali - - 2008
BACKGROUND: Many studies have investigated the variations in the anatomy of each segment of the cerebral arterial circle while a few have addressed the variations of the cerebral arterial circle as a whole. METHODS: Thirty brains of recently deceased Iranian infants and fetuses were dissected. The dissection process was filmed ...
Krishnamurthy A - - 2008
Posterior cerebral artery, terminal branch of basilar artery joins the posterior communicating artery to help complete the circulus arteriosus cerebri in human beings. A study of 89 formalin-fixed brain specimen of either sex and of Indian origin has showed that the mean length and diameter of the posterior cerebral artery ...
Sadamasa Nobutake - - 2008
Cerebral aneurysms are a major cause of subarachnoid hemorrhage, but the mechanism of their development remains unclear. In this study, we investigated candidate genes whose expression is significantly changed during the development of experimentally induced cerebral aneurysms using adaptor-tagged competitive polymerase chain reaction (ATAC-PCR). Twenty-four rats received sham operation (control) ...
Hofmeijer Jeannette - - 2008
BACKGROUND: We performed a systematic review to identify predictors of the development of life-threatening brain edema in patients with middle cerebral artery infarction. METHODS: We searched Medline from January 1966 and Embase from January 1974 to April 2007 for cohort and case-control studies on predictors of life-threatening edema in patients ...
Buompadre María Celeste - - 2008
This article describes an 11-year-old girl with a diagnosis of Ebstein's anomaly. Glenn and Fontan surgeries were performed successfully. She had a generalized tonic-clonic seizure after peripheral intravenous infusion under pressure. A computed tomography brain scan performed 30 minutes later showed multiple serpiginous hypodensities in the cortical sulci and in ...
Shiogai T - - 2008
BACKGROUND: Cerebral vasoreactivity (CVR) in the major cerebral arteries evaluated by transcranial Doppler sonography has shown some correlation with CVR in the brain tissue measured by other neuroradiological modalities. To clarify vasoreactive differences in the brain tissue and the major cerebral arteries, we have evaluated the relationship of acetazolamide (ACZ) ...
Cornelius Jason R - - 2008
A subset of patients with major cerebral hemispheric ischemia due to distal internal carotid artery or proximal middle cerebral artery occlusion has rapid spontaneous improvement of neurologic deficits. This phenomenon has been designated the "spectacular shrinking deficit." A 79-year-old woman had the sudden onset of neurologic deficits consistent with a ...
Voorend M M Department of Neurology, Cardiovascular research institute Maastricht (CARIM) University Hospital Maastricht. - - 2008
To explore whether Chlamydia pneumoniae, Cytomegalovirus and Herpes Simplex Virus type 1 could be detected in large and small cerebral arteries, as well as in an area of brain parenchyma where white matter lesions (leukoaraiosis) can be found, in patients with clinically unmanifested cerebrovascular atherosclerosis. Methods and results( Arterial specimens ...
Fujimura Miki - - 2008
OBJECT: Surgical revascularization for moyamoya disease prevents cerebral ischemic attacks by improving cerebral blood flow (CBF). It is undetermined, however, how rapid increase in CBF affects chronic ischemic brain during the acute stage in childhood moyamoya disease. MATERIALS AND METHODS: The present study includes nine consecutive cases of patients with ...
Jordan Lori C - - 2008
Transcranial Doppler ultrasound is a noninvasive vascular assessment technique proved useful in the management of pediatric disorders predisposed to stroke and may have similar utility for Sturge-Weber syndrome. Eight children with Sturge-Weber syndrome had velocities measured in the major cerebral arteries via the Stroke Prevention Trial in Sickle Cell Anemia ...
Depedrini J S - - 2007
The present study has analysed 30 pampas fox brains (Pseudalopex gymnocercus), injected with latex, aiming to systematize and describe the distribution and vascularization territories of the middle cerebral artery. After being originated from the rostral branch of the internal carotid artery this vessel formed the following collateral branches: rostral choroidal ...
Schubert Armin - - 2007
The causes of postoperative cardiovascular disturbances in neurosurgical patients include direct cardiac neurogenic effects, clinical situations where brain tissue is underperfused, and hyperdynamic states. EKG and echographic abnormalities are common in subarachnoid hemorrhage where cardiac troponin I is the most useful predictor of cardiac risk after SAH. Neurogenic pulmonary edema ...
Geltser B I - - 2007
Vasomotor activity of the major and cerebral arteries was studied in mice with chronic obstructive pulmonary disease. Regional differences were revealed in the endothelium-dependent response of arteries. The development of chronic obstructive pulmonary disease was associated with a paradoxical response of the dilatational component of vasoregulation against the background of ...
Sharma Vijay K - - 2007
Transcranial Doppler is often employed for the assessment of cerebral hemodynamics. The study by Chao et al in the February 2007 issue of the journal raises some important issues regarding the understanding of the mechanisms involved in cough syncope. We suggest including some additional monitoring parameters, for example, end-tidal or ...
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