Search Results
Results 401 - 450 of 1893
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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 ...
Vasovic L P - - 2006
An unpaired trunk forming part of the anterior cerebral arteries, the so-called azygos pericallosal artery, was found in a male fetus among a collection of 200 fetuses. The morphological characteristics of the trunk and the anterior cerebral arteries at the "preazygos" and the "postazygos" segments were examined using an operating ...
Daghigi M H - - 2006
An accessory middle cerebral artery is one variation of the intracranial vasculature that may be a source of misinterpretation by clinicians dealing with cerebrovascular diseases. We report a case of an elderly female found to have bilateral accessory middle cerebral arteries, who presented with the rupture of an aneurysm of ...
Kirton Adam - - 2006
BACKGROUND: Reversible segmental cerebral vasoconstriction (RSCV) is a recognizable clinical and radiographic syndrome consisting of thunderclap headache with or without focal neurological symptoms combined with reversible segmental vasoconstriction of proximal cerebral blood vessels. METHODS: We report a case of reversible segmental cerebral vasoconstriction in a child. RESULTS: A healthy 13-year-old ...
Kuo J-R - - 2006
To evaluate the validity of transcranial Doppler (TCD) in confirming brain death from various pathological conditions. An observational case-control study over a 2.5 year period, in which transcranial Doppler (TCD) examinations were done on 101 comatose patients for confirmation of brain death. Between October 2002 to May 2005, 44 clinically ...
Szatmary Z - - 2006
A patient with a 20 year history of primary orgasmic headache is described who, after suffering an unusually severe episode of orgasmic headache was found to have a middle cerebral artery dissection. This unusual association of primary and secondary orgasmic headache emphasises the need for a thorough diagnostic examination when ...
Miller Alyson A - - 2006
Reactive oxygen species (ROS) are thought to play an important role in the initiation and progression of a variety of vascular diseases. Furthermore, accumulating evidence indicates that ROS may also serve as important cell signalling molecules for the regulation of normal vascular function. Recently, a novel family of proteins (Nox1, ...
Fu Jian Hui - - 2006
BACKGROUND AND PURPOSE: The relationships between cerebral vasomotor reactivity (CVR) and white matter lesions (WMLs) were investigated mainly in patients with carotid stenosis. We aimed to study the relationship in asymptomatic elderly subjects without large artery occlusive disease. METHODS: A total of 33 elderly individuals (mean age was 76.2 years) ...
Erbay Sami H - - 2006
Hemodynamic factors may play a role in the seeding and subsequent growth of cerebral metastasis. The authors present a case with 2 foci of cerebral metastasis in the same vascular territory ipsilateral to an occluded internal carotid artery. A 65-year-old man with chronic left frontal lobe infarct and left internal ...
Uchino Akira - - 2006
Unlike fenestration of the posterior cerebral arterial circulation, fenestration of the anterior cerebral arterial circulation has not been well described. We investigated the location and configuration of fenestration of the middle cerebral artery (MCA) detected by magnetic resonance (MR) angiography. We found 6 fenestrations of the MCA among cranial MR ...
Tetsuo Yamashita / Kunihiko ...
A case of an aneurysm arising from the junction of the internal carotid artery and duplicated middle cerebral artery was reported. A 77-year-old female was admitted to our hospital with complaints of headache, nausea, vomiting and disturbance of consciousness. CT scan showed a high-density area in the basal cistern and ...
Tetsuo YAMASHITA / Masaaki ...
Cerebral blood flow and cerebral vascular reserve were measured using a stable xenon enhanced computed tomography (Xe-CT) with acetazolamide test. Five normal male adults and ten male patients with occlusive lesion of internal carotid artery were studied. Vascular reserve was 18±13ml/100g/min in the normalcontrol, and 10±10ml/100g/min in the affected side ...
Hisato Nakayama
The hemispheric cerebral blood flow (CBF) in 32 patients with acute cerebral artery occulusion was measured by means of xenon-enhanced compuetd tomography. Eighteen patients ware treated with endovascular thrombolysis by intra-arterial administation of thrombolytic agents and occuluded arteries were recanalized, while 14 patients were treated conservatively. The CBF and cerebrovascular ...
Naoto Adachi / Tatsuaki ...
We report rare case of traumatic cerebral aneurysm. A 36-year-old man fell and struck the right pariental region of his head. He lost consciousness for 10 min but had no neurological deficits on admission. CT scan revealed right acute subdural hematoma. On the eighth day, we anticipativery performed precautionary cerebral ...
Seisho ABIKO / Tokio ...
Anastomosis of the superficial temporal artery to a cortial branch of the middlecerebral artery (STA-MCA bypass) was useful in three cases with vascular dementia. The ages of the patients were 27, 61 and 53 years, respectively. The main clinical symptoms in these patients were impairment of memory, dyscalculia and urinary incontinence following ischemic ...
Drummond John C - - 2006
A 58-yr-old patient sustained a cerebral ischemic injury in the distribution of the carotid artery ipsilateral to retraction during an anterior cervical discectomy. Relative hypotension was permitted during the anesthetic. Angiography revealed an anatomic variant of the circle of Willis that resulted in minimal collateralizaton of the left internal carotid ...
Olsson Christian - - 2006
BACKGROUND: Selective antegrade cerebral perfusion has been introduced as a strategy of cerebral protection in operations on the aortic arch with hypothermic circulatory arrest. Several techniques of unilateral and bilateral cerebral perfusion have been described with varying results. METHODS: Patients underwent either unilateral cerebral perfusion with a cannula in the ...
Gupta R - - 2006
We report a case of a 54-year-old man who presented with a right middle cerebral artery territory infarct and was treated with systemic thrombolytics. He continued to fluctuate neurologically and, with the use of angiography, was found to have an occlusion of the right M2 artery (superior division). This occlusion ...
Whitaker Donald C - - 2006
INTRODUCTION: Microemboli are the main implicated cause of neuropsychological (NP) impairment after cardiac surgery. This prospective clinical trial compared the effect of an auto-venting arterial line filter on intraoperative cerebral microemboli and NP outcome compared to an arterial line filter with a vent line, in patients undergoing elective coronary artery ...
Sayeed Iqbal - - 2006
STUDY OBJECTIVE: We compare the effects of postinjury administration of allopregnanolone, a metabolite of progesterone, to progesterone in an animal model of transient middle cerebral artery occlusion. METHODS: Focal cerebral ischemia was induced in age-matched, adult, male, Sprague-Dawley rats by using an intraluminal filament and suture method to occlude the ...
Chuncher Sununta - - 2006
The microangioarchitecture of the thalamus and metathalamus in common tree shrew (Tupaia glis) was studied using vascular corrosion cast/stereomicroscope and SEM technique. The arterial supply of the thalamus and metathalamus was found to originate from perforating branches of the posterior communicating artery, the posterior cerebral artery, the middle cerebral artery, ...
Kai Yutaka - - 2006
BACKGROUND: Duplication of the middle cerebral artery (DMCA) is an anomalous vessel arising from the internal carotid artery (ICA). The origin of the DMCA lies between the anterior choroidal artery and the distal end of the ICA. The association of cerebral aneurysm and DMCA is rare. CASE DESCRIPTION: In this ...
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