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Results 401 - 450 of 1914
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McMahon C J - - 2007
Use of transcranial Doppler (TCD) to diagnose vasospasm has been criticised. We examined reproducibility of TCD middle cerebral artery (MCA) velocity measurements. Thirty-six healthy adult volunteers were recruited. Four operators, two experienced and two inexperienced, participated. MCA velocity was measured twice by one operator and once by a second operator. ...
Kumabe Toshihiro - - 2007
OBJECT: Opercular glioma inferolateral to the hand/digit sensorimotor area can be resected safely using a neuronavigation system and functional brain mapping techniques. However, the surgery can still sometimes cause postoperative ischemic complications, the character of which remains unclear. The authors of this study investigated the occurrence of infarction associated with ...
Sadamasa Nobutake - - 2007
OBJECT: Cerebral aneurysm is a major cause of subarachnoid hemorrhage, but the mechanisms of its development remain unclear. Mechanical stretch has been reported to induce vascular smooth-muscle cell apoptosis via endothelin B receptors (ETBRs). The objectives of this study were to clarify the expression and localization of ETBR in cerebral ...
Talman William T WT Laboratory of Neurobiology, Department of Neurology, VAMC and Carver College of Medicine, University of Iowa, Iowa City, IA 52246, USA. - - 2007
Forebrain arteries receive nitroxidergic input from parasympathetic ganglionic fibers that arise from the pterygopalatine ganglia. Previous studies have shown that ganglionic stimulation in some species led to cerebral vasodilatation while interruption of those fibers interfered with vasodilatation seen during acute hypertension. Because the ganglionic fibers are quite delicate and are ...
Ammon Jennifer Tucker - - 2007
Cerebral embolism in patients undergoing total joint arthroplasty has an incidence rate of 0.5%. In those cases where cerebral emboli were confirmed, a venous-to-arterial circulation shunt, most commonly a patent foramen ovale, was identified. We report a case of severe cerebral fat emboli during cementless total hip arthroplasty in the ...
Calabrese Leonard H - - 2007
Reversible cerebral vasoconstriction syndromes (RCVS) comprise a group of diverse conditions, all characterized by reversible multifocal narrowing of the cerebral arteries heralded by sudden (thunderclap), severe headaches with or without associated neurologic deficits. Reversible cerebral vasoconstriction syndromes are clinically important because they affect young persons and can be complicated by ...
Okazaki Shuhei - - 2007
Paradoxical cerebral embolism (PCE) is defined to be a pathological condition in which emboli originating from the venous system reach the cerebral arterial circulation via the right-to-left (R-L) shunt. In patients with PCE, emboli originating from the venous system most commonly pass through the patent foramen ovale during Valsalva-provoking activities ...
Schatlo Bawarjan - - 2007
Transcranial Doppler sonography (TCD) is used to assess cerebral blood flow velocity in basal cerebral arteries and is a common tool for the diagnosis and follow-up of cerebrovascular disease. With more than 200 clinical studies using TCD published annually, indications for its use are expanding. The current article critically reviews ...
Combes J-C - - 2007
OBJECTIVE: This study examined the validity of cerebral computed tomographic (CT) angiography in the diagnosis of brain death (BD) compared with conventional cerebral angiography. METHODS: This prospective, monocentric study was performed over a 24-month period and included 43 patients, at least 18 years of age, with clinical criteria of BD. ...
Puca A - - 2007
We observed a 32-year-old female who had suffered from a left hemisphere ischemic stroke with right hemiparesis at the age of seven. At that time, a CT scan demonstrated a left ischemic lesion in nucleo-capsular region and a cerebral angiogram documented a complete occlusion of the supraclinoid segment of the ...
Takagi Yasushi - - 2007
Moyamoya disease (MMD) is a cerebrovascular occlusive disease characterized by progressive stenosis or occlusion at the distal ends of the bilateral internal carotid arteries. Vascular structural changes were previously detected using postmortem specimens. This study investigated 35 specimens of the middle cerebral artery (MCA) from 25 patients undergoing surgical treatment ...
Taniguchi M - - 2007
BACKGROUND: To establish multiple bypass flow in an adult Moyamoya disease patient, the distal stump of the parietal superficial temporal artery (dsPSTA) was used as an additional donor. METHODS: Its potential as the donor was first evaluated by measuring the arterial pressure directly in three patients, revealing about 80% in ...
Furuse Motomasa - - 2007
OBJECTIVES: Achieving rapid, brain cooling has potentially important clinical implications. To investigate potential practicalities, we induced brain hypothermia in canines by perfusing cooled crystalloid solution into the carotid artery using an extracorporeal cooling-filtration system. METHODS: Ringer's solution cooled to approximately 6.5 degrees C was infused at a rate of 3 ...
Bolin David C - - 2007
Two beef steers accidentally injected into a branch of the auricular artery with an oil-based formulation of ceftiofur died within 5 minutes of injection. Notable pathologic findings included distention and obstruction of cerebral and cerebellar arteries by a whitish tan material and hemorrhages within meningeal spaces, the choroid plexus, cerebrum, ...
Flegar-Mestrić Zlata - - 2007
BACKGROUND: C-reactive protein (CRP) as a non-specific inflammatory biomarker has been demonstrated to actively contribute to all stages of atherogenesis. The aim of this study was to investigate the relation between CRP concentrations and the severity of stenosis of cerebral arteries. METHODS: Lipid parameters and CRP levels were measured in ...
Rahimi-Sharbaf Fatemeh - - 2007
Nowadays management of severe Rh alloimmunization consists of serial determination of middle cerebral artery peak systolic velocity, amniocentesis, cordocentesis, and in many instances intrauterine transfusion. We present a case of severe Rh alloimmunization who, for the first time in Iran, was delivered at term after several intrauterine transfusions.
Waaijer A - - 2007
PURPOSE: To assess the presence of anterior and posterior collateral pathways in the circle of Willis in patients with symptomatic carotid artery stenosis (SCAS) and to compare this to patients without carotid artery stenosis. MATERIALS AND METHODS: Multislice CT angiography was performed in 91 patients and 91 control subjects. Using ...
Srikanth S G SG Departments of Neuroimaging & Interventional Radiology, National Institute of Mental Health & Neurosciences, Bangalore, India - - - 2006
Spontaneous middle cerebral artery (MCA) occlusion leading to moyamoya phenomenon is different from classical moyamoya disease. Previous studies have reported such phenomena in adults with ischemic lesions, except for a solitary case in a child.We report a case of a ten-year old girl who presented with a deep intracerebral hematoma ...
Aoki Tomohiro - - 2007
BACKGROUND AND PURPOSE: Mechanisms of initiation, progression and rupture of cerebral aneurysms have not yet been fully understood despite its clinical significance. Matrix metalloproteinases (MMPs) are a family of proteinases which are involved in the remodeling of vascular walls. In the present study, we investigated the significance of MMPs in ...
Liu Zhengyan - - 2007
BACKGROUND AND PURPOSE: Evidence suggests that activated microglia are detrimental to the survival of new hippocampal neurons, whereas blocking inflammation has been shown to restore hippocampal neurogenesis after cranial irradiation and seizure. The aim of this current study is to determine the effect of minocycline on neurogenesis and functional recovery ...
Zwienenberg-Lee Marike - - 2006
Cerebral vasospasm remains a leading cause of death and disability in patients with ruptured cerebral aneurysms. The development of endovascular intervention in the past two decades has shown promising results in the treatment of vasospasm. Endovascular techniques that have been used in humans include intra-arterial infusion of vasorelaxants and direct ...
Uz Aysun - - 2006
The aim of this study was to evaluate the relationship between the cisternal segment of the oculomotor nerve and the posterior cerebral artery and its branches. The oculomotor nerve and the posterior cerebral artery of 15 cadaver brains (30 hemispheres) were examined using a surgical microscope. The dorsal portion of ...
Shim Hackjoon - - 2006
In this paper a method to extract cerebral arterial segments from CT angiography (CTA) is proposed. The segmentation of cerebral arteries in CTA is a challenging task mainly due to bone contact and vein contamination. The proposed method considers a vessel segment as an ellipse travelling in three-dimensional (3D) space ...
Vijay Anantha - - 2006
Genetic modification of cerebral vessels represents a promising and novel approach for prevention and/or treatment of various cerebral vascular disorders, including cerebral vasospasm. In this review, we focus on the current understanding of the use of gene transfer to the cerebral arteries for prevention and/or treatment of cerebral vasospasm following ...
Kikuta Ken-ichiro - - 2006
OBJECTIVE: To introduce a method for preoperative targeting of a proper recipient artery in superficial temporal artery-to-middle cerebral artery anastomosis. METHODS: Six operations for superficial temporal artery-to-middle cerebral artery anastomosis in four patients with moyamoya disease or moyamoya-like disease and two operations in two patients with atherosclerotic cerebrovascular occlusive disease ...
Bortoluzzi M M Department of Neurosurgery - University of - - 2006
A young patient with a facial trauma after a road accident was admitted to our department with incoercible epistaxis. A CT scan showed a right pterional acute epidural hematoma (EDH). Angiography demonstrated multiple sources of bleeding of the right sphenopalatine arteries, cause of the epistaxis, and an intracranial leakage of ...
Bokeriia Leo A - - 2007
BACKGROUND: The aim of the study was to determine the effects of asymmetric cerebral embolic load on cognitive functions. METHODS: Thirty-six open heart surgery (OH) and 26 coronary artery bypass grafting (CABG) patients were evaluated by neuropsychological and transcranial Doppler tests. RESULTS: OH was associated with a significantly larger microembolic ...
Lee Jin Soo - - 2006
Spontaneous middle cerebral arterial dissection (MCAD) is a rare cause of ischemic stroke. We report two cases of isolated spontaneous MCAD causing ischemic stroke. MCAD should be considered when a young patient has a middle cerebral artery territory infarct with stenosis at the origin of the middle cerebral artery. We ...
Lyoo Chul Hyoung - - 2007
We report a patient with moyamoya disease presenting with paroxysmal exercise-induced dyskinesia (PED). A 31-year-old lathe man developed recurrent attacks of paroxysmal hemichorea. The attacks always affected his left limbs and occurred either after several hours of working or while playing football. The duration of attacks ranged from 30 min ...
Ritt Martin - - 2006
We report the case of a young woman who had transient encephalopathy with nausea, cognitive impairment, 2 generalized seizures accompanied by visual impairment, and stenotic alterations of cerebral vessels lasting for weeks until complete resolution. These findings were associated with an elevated antideoxyribonuclease B level and biopsy-proven poststreptococcal glomerulonephritis. At ...
Gao Huanmin - - 2006
BACKGROUND: This study was designed to develop a simple, reversible primate middle cerebral artery (MCA) occlusion (MCAO) model. METHODS: MCAO was achieved by inserting a specially designed intraluminal balloon catheter from the external carotid artery, then to the internal carotid artery, and finally into the proximal segment of MCA using ...
Ishikawa Tatsuya - - 2006
Some patients with moyamoya disease treated by conventional surgical procedures may develop postoperative refractory ischemia and perioperative cerebral infarction in the anterior cerebral artery (ACA) territory. We present a novel operative procedure for moyamoya disease to avoid the risk of ischemia in the ACA territory, which consists of simultaneous superficial ...
Günther Matthias - - 2006
Intracranial vascular territories are usually visualized with the use of angiographic techniques. However, because it is difficult to visualize the distal vascular bed with any angiographic technique, it is also difficult to infer the parenchymal borders of vascular territories. Arterial spin labeling (ASL) MRI provides information on cerebral perfusion, and ...
Agrawal, Amit
Hyperdense middle cerebral artery sign on non-contrast CT scan has been recognized as a marker of thrombus in the middle cerebral artery. It is associated with a subsequent large cerebral infarction and poor outcome despite treatment. This case illustrates the sign and also its grave consequences.
Christoforidis G A - - 2006
PURPOSE: This study sought to determine whether the angiographic demonstration of slow antegrade contrast opacification of an occluded cerebral artery distal to the thrombus (clot outline sign) on cerebral arteriograms performed immediately before thrombolytic treatment is associated with higher recanalization rates relative to patients without antegrade contrast opacification distal to ...
Miller Alyson A - - 2006
Reactive oxygen species play a role in neuronal damage following cerebral ischemia-reperfusion. We tested whether activity of the superoxide-generating enzyme, NADPH-oxidase, is enhanced in cerebral arteries within, adjacent and distant from the ischemic core. The right middle cerebral artery (MCA) of conscious rats was temporarily occluded by perivascular injection of ...
Mahakkanukrauh Pasuk - - 2006
To elucidate compositional changes of the cerebral arteries with aging, the authors investigated age-related changes of elements in the cerebral arteries by inductively coupled plasma-atomic emission spectrometry (ICP-AES). After an ordinary dissection by medical students at Chiang Mai University was finished, the anterior, middle, and posterior cerebral arteries and the ...
Morigaki Ryoma - - 2006
In this paper the authors describe two patients with recurrent hemiparesis and limb shaking that gradually progressed to hemichorea. Cerebral angiography confirmed severe unilateral internal carotid artery stenosis (95%) contralateral to the hemichorea. The cerebral blood flow, assessed using N-isopropyl-p-(iodine-123) iodoamphetamine single-photon emission computed tomography (SPECT), disclosed markedly decreased vascular ...
Kashimura Hiroshi - - 2006
A 65-year-old woman presented with subarachnoid hemorrhage (SAH). Angiography detected a small bulge in the A1 segment of the right anterior cerebral artery (ACA). The patient was managed conservatively. Ten days after the initial SAH, the patient suffered a second SAH. Cerebral angiography demonstrated a fusiform aneurysm in the right ...
Kruse Lars S - - 2006
Activation of the trigeminovascular pain signalling system appears involved in migraine pathophysiology. However, the molecular mechanisms are only partially known. Stimulation of cAMP and cGMP production as well as inhibition of their breakdown induce migraine-like headache. Additionally, migraine may be associated with mutations in ion channels. The aim of the ...
Chakraborty S S Department of Medical Imaging, Division of Neuro-imaging, University of Toronto, Toronto Western Hospital; Canada - - - 2006
We describe a case of bilateral infraoptic origin of the anterior cerebral arteries associated with an anterior communicating artery (ACOM) aneurysm. Anatomical variations of the anterior cerebral artery (ACA) are common; however, bilateral infraoptic course of the anterior cerebral artery is extremely rare. Since an infraoptic course of the ACA ...
Zhang Yongyu - - 2006
The protective effect of flavonoids extracted from Scutellaria baicalensis Georgi on cerebral ischemia injury has been explored in experimental animals. Scutellaria flavonoid (SF) could significantly prolong gasping time (prolonged ratio, 23.79%) and survival time after carotid artery occlusion, and decrease attenuate malondialdehyde (MDA) content in damaged brain tissues from 118.56+/-47.95 ...
Maramattom Boby V - - 2006
OBJECTIVE: The diagnosis of isolated central nervous system angiitis often requires both cerebral angiography and biopsy for diagnosis. CLINICAL PRESENTATION: We present a case of gliomatosis cerebri with demonstrated angiographic changes suggestive of a central nervous system vasculitis. INTERVENTION: A 47-year-old woman presented with a 2-week history of worsening headache ...
Kidoguchi Keiji - - 2006
BACKGROUND AND PURPOSE: We, for the first time, performed in vivo x-ray angiography in the mouse brain using SPring-8, a third-generation synchrotron radiation facility. METHODS: A thin PE-50 tube was placed in the unilateral external carotid artery in adult male C57BL/6J mice. While maintaining the blood flow in the internal ...
Schönburg M - - 2006
Serious postoperative psycho-neurological dysfunction is at least partially attributed to the occurrence of gaseous microbubbles in the arterial line of extracorporeal circulation (ECC). Therefore, we investigated in a prospective randomized double blind study whether the usage of dynamic bubble trap (DBT) will reduce microbubble load of patients undergoing aortic valve ...
Prabhakaran Shyam - - 2006
BACKGROUND: Subcortical transient ischemic attacks are usually seen in individuals with small-vessel disease. They are often refractory to medical treatment and progress to infarction in many cases. PATIENT: We describe a young man with an unusual and protracted case of recurrent capsular ischemia due to postcoital middle cerebral artery dissection. ...
Lim Soo Mee - - 2007
Branch occlusion of the anterior cerebral artery (ACA) is regarded as a part of Moyamoya disease. The purpose of this study is to define the ACA steal phenomenon (SP) in Moyamoya disease and to evaluate temoporal changes according to the disease progression. From 139 Moyamoya patients we defined ACASP as ...
Chen Hsin-Hung - - 2006
We describe a patient with a right anterior choroidal artery territory infarction and an inconspicuous left visual defect. The anterior choroidal artery is a unique artery of the cerebral circulation. The occlusion of this artery can result in dysfunction of motor, sensory, and visual systems with only rare involvement of ...
Kim Yo Sik - - 2006
BACKGROUND AND PURPOSE: An extremely low pulsatile cerebral perfusion can result in a massive cerebral infarction and poor outcome. We report a patient who had complete recovery from initial neurological deficits in spite of nonpulsatile perfusion in the middle cerebral artery. METHODS: We used carotid duplex and transcranial Doppler to ...
Koyama Jun-ichi - - 2006
A new method was developed to maintain a bloodless microscopic operative field for superficial temporal artery-middle cerebral artery (MCA) anastomosis surgery. A silicone suction tube with multiple holes is placed circumferentially under the reflected dural flaps around the craniotomy. Blood and irrigated saline are continuously aspirated by the tube. Use ...
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