Search Results
Results 301 - 350 of 1890
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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 - - 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 - - 2008
Aims: 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 ...
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 ...
Lee Seung Hwan - - 2007
Unruptured non-traumatic dissecting aneurysm in the M4 segment of the middle cerebral artery (MCA) accompanied by complete occlusion of the ipsilateral internal cerebral artery (ICA) has never been reported. A 41-year-old man presented with an infarction manifesting as left-sided weakness and dysarthria. Magnetic resonance angiography revealed a subacute stage infarction ...
Eskesen Karen - - 2007
Calcitonin-like receptor (CL-R) is a functional CGRP1-receptor when complexed with RAMP1 or an adrenomedullin-receptor or when complexed with RAMP2 or RAMP3. This study was carried out 1. to set up a method to examine the relative quantity of mRNA of CL-R, RAMP1, RAMP2 and RAMP3 in human coronary (CA), pulmonary ...
Freret Thomas - - 2008
The common marmoset (Callithrix jacchus), a New World monkey, has recently been used as a model of focal cerebral ischaemia. Here, we sought to develop a stroke model in this species using an intraluminal approach to occlude the middle cerebral artery (MCA). This technically simple procedure allows both transient and ...
Purandare N - - 2008
The study aimed to examine the relationship between spontaneous cerebral emboli (SCE), patent foramen ovale (PFO) and white matter hyperintensities (WMH) on cerebral MRI in patients with Alzheimer's disease (AD) and vascular dementia (VaD). SCE were identified by transcranial Doppler of the middle cerebral artery for 1 h. A "significant" ...
Krayenbühl Niklaus - - 2007
OBJECTIVE: Cutting the posterior communicating artery (PComA) can improve the neurosurgeon's view and maneuverability while performing surgery within the interpeduncular fossa. Although mentioned in some reports, its technique and safety have not been studied in detail thus far. METHODS: Patients undergoing surgery for vascular and neoplastic lesions in the interpeduncular ...
Paiva Fernando F - - 2007
The ability to assess the perfusion territories of major cerebral arteries can be a valuable asset to the diagnosis of a number of cerebrovascular diseases. Recently, several arterial spin labeling (ASL) techniques have been proposed for determining the cerebral perfusion territories of individual arteries by three different approaches: (1) using ...
Lee Jung Hwan - - 2007
A 26-year-old man was admitted to our department due to intermittent left hemiparesis for 3 months. Magnetic resonance image showed subacute infarction in the right precentral gyrus. Digital subtraction angiography and magnetic resonance angiography revealed an aneurysmal protrusion at the right middle cerebral artery (MCA) bifurcation. It was difficult to ...
Singer Oliver C - - 2007
Pathological yawning can be a clinical sign in disorders affecting the brainstem. Here we describe seven patients with pathological yawning caused by acute middle cerebral artery stroke, indicating that pathological yawning also occurs in supratentorial stroke. We hypothesise that excessive yawning is a consequence of lesions in cortical or subcortical ...
Lee Kee-Oog - - 2007
PURPOSE: The arterial pulsatility index (PI) is measured by transcranial Doppler ultrasonography (TCD) and is postulated to reflect the vascular resistance distal to the artery being examined. An increased PI of the intracranial artery is often reported with diabetes mellitus (DM), old age, hypertension, intracranial hypertension, vascular dementia, and small ...
Bejot Yannick - - 2008
Ischemia of the areas supplied by the anterior cerebral artery is relatively uncommon. In addition, combined hemiballismus and masturbation have rarely been reported in patients with cerebrovascular disease. We describe herein a 62-year-old right-handed man simultaneously exhibiting right side hemiballismus and involuntary masturbation with the left hand after bilateral infarction ...
Maingay-de Groof Femke - - 2008
INTRODUCTION: Incontinentia pigmenti (IP) is a rare X-linked dominant neuroectodermal multisystem disorder characterized by skin lesions following Blaschko lines. In almost all patients the skin is involved and in 30-50% the central nervous system (CNS) is. Vascular occlusive phenomena probably play a role in CNS involvement. Whether these vascular changes ...
Totaro Pasquale - - 2008
Cerebral and/or visceral malperfusion during CPB is a potentially dramatic situation which can be easily misunderstood if a complete monitoring of arterial pressure and cerebral saturation is not available. Here we present a case in which we could promptly diagnose cerebral and visceral malperfusion just after starting cardiopulmonary bypass. Use ...
Proweller Aaron - - 2007
Stroke is the third leading cause of death and a significant contributor of morbidity in the United States. In humans, suboptimal cerebral collateral circulation within the circle of Willis (CW) predisposes to ischemia and stroke risk in the setting of occlusive carotid artery disease. Unique genes or developmental pathways responsible ...
Misra Vivek - - 2007
BACKGROUND: Cerebral sino-venous thrombosis (CVT) is commonly treated with anticoagulant therapy. There are reports of response to endovascular thrombolysis with or without mechanical aspiration in patients with clinical deterioration. CASE: We present a 29-year-old man with acute onset of severe headache, found to have extensive CVT by magnetic resonance venography ...
Huh Jun Suk - - 2007
The azygos anterior cerebral artery, a rare anomaly in the circle of Willis in which only a single vessel supplies the medial aspects of both anterior cerebral hemispheres, is closely associated with saccular aneurysms. We present three cases of azygos anterior cerebral artery aneurysms among the 781 cerebral aneurysms surgically ...
Shoja Mohammadali M - - 2008
Cerebral control of respiration has been extensively studied but at present, no evidence of cerebral laterality or dominance for respiration exists. We examined the ventilatory changes following temporary (20 min) occlusion of the right or left common carotid artery in rabbits. The corresponding groups of sham-operated rabbits were used as ...
Waaijer Annet - - 2007
PURPOSE: To prospectively evaluate changes in brain perfusion computed tomographic (CT) parameters after revascularization of unilateral symptomatic carotid artery stenosis and to determine whether pretreatment perfusion CT parameters can be used to predict changes in cerebral hemodynamics after treatment. MATERIALS AND METHODS: This study was medical ethics committee approved, and ...
Laar, Peter Jan van
The ability to visualize the perfusion territories of the brain feeding arteries is important for many clinical applications. Recently, selective arterial spin labeling (ASL) MRI has been introduced as the first method capable to visualize the perfusion territories of the brain in-vivo. In this thesis we describe the possibilities of ...
Vasović Ljiljana P - - 2007
Numerous studies have reported that all components of the cerebral arterial circle in the 4-month-old human fetus are more slender than adult vessels, and of equal caliber. After that period, a degree of caliber differentiation is present, especially at the level of the posterior communicating arteries. The aim of this ...
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