Search Results
Results 451 - 500 of 1891
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Togao O - - 2006
BACKGROUND AND PURPOSE: In Moyamoya disease, the relationship between cerebral hemodynamics and angiographic findings has not been fully evaluated. The purpose of this study is to evaluate hemodynamics in Moyamoya disease with perfusion-weighted MR imaging (PWI) and cerebral angiography. METHODS: Twenty patients with Moyamoya disease were the subjects. Mean transit ...
Iwashita Tomomi - - 2006
A 68-year-old woman with no history of cardiac events suffered acute myocardial infarction after surgery for middle cerebral artery (MCA) occlusion manifesting as transient left motor weakness. Diffusion-weighted magnetic resonance imaging revealed multiple infarctions in the right cerebral hemisphere. Magnetic resonance angiography and cerebral angiography demonstrated an occlusion at the ...
Gur A Y - - 2006
We evaluated the cerebral hemodynamic features of severe bilateral carotid stenosis by assessing and comparing cerebral vasomotor reactivity (VMR) in the middle cerebral (MCA) and vertebral arteries (VA) by transcranial Doppler and the Diamox (1 g acetazolamide i.v.) test. VMR was evaluated by recording the percentage differences in peak systolic ...
Ugur Hasan Caglar - - 2006
OBJECT: The vascularization pattern of the anatomy of the distal anterior cerebral artery (ACA) remains a subject of debate. The authors provide detailed information about the distal ACA and shed light on issues concerning it that have not previously been adequately discussed. METHODS: Fifty adult human brains (100 hemispheres) were ...
Moraca Robert - - 2006
BACKGROUND: Cognitive dysfunction and cerebral vascular accidents remain some of the most devastating problems related to cardiac surgery. Despite the major advances in perioperative care and operative technique in coronary artery bypass, this cohort of patients appears to have poor cerebral physiologic reserve. The aim of this study was to ...
Uchiyama N N Department of Neurosurgery, Keiju Medical Center, Nanao-city, Ishikawa; Japan - - - 2006
A 60-year-old man presented with syncope and transient left-sided motor weakness. Cerebral angiography revealed multiple severe atherosclerotic stenoses of bilateral internal carotid arteries, bilateral intracranial vertebral artery (VA), and left VA origin. A SPECT study showed poor cerebral perfusion and vascular reserve in the right cerebral hemisphere and the posterior ...
Yakushiji Yusuke - - 2006
We describe a rare case of spontaneous middle cerebral artery (MCA) dissection that caused cerebral infarction and subarachnoid hemorrhage (SAH), which also presented with a hyperdense artery sign. A hyperdense artery sign of the MCA in acute cerebral infarction strongly indicates thromboembolic MCA occlusion, which is often treated with thrombolytic ...
Nirkko Arto C - - 2006
Syncope is defined as an acute, brief and transient loss of consciousness and postural tone with spontaneous and complete recovery. Neurovascular ultrasound has contributed to elucidate the underlying mechanism of different types of syncope. In routine diagnostic work-up of patients with syncope, however, neurovascular ultrasound is not among the first ...
Loukas Marios - - 2006
There is considerable inconsistency in the description of the origins, dimensions, and course of the recurrent artery of Heubner (RAH). The RAH frequently supplies parts of the basal ganglia and the anterior limb of the internal capsule and can be damaged with improper clip placement during repair of aneurysms near ...
Baumgartner Ralf W - - 2006
Insonation of the intracranial cerebral arteries, veins, and sinus is performed with transcranial Doppler or color duplex sonography. The orbital window is mainly used to identify the ophthalmic artery and carotid siphon, which can be detected in most patients. The temporal window allows the investigation of the anterior, middle, and ...
Patiroglu Turkan - - 2006
A 13-year-old female patient is presented who had hypofibrinogenemia diagnosed as von Willebrand disease at 5 years of age at another hospital. She was admitted to the department of pediatric hematology with a severe headache, vomiting, and progressive right flaccid hemiplegia and lethargy. Contrast-enhanced computed tomography scan showed subdural hematoma ...
Chapot R - - 2006
We report an unusual etiology for a thromboembolic complication. Occlusion of the middle cerebral artery occurred before embolization of an intracranial aneurysm. Attempts to recanalize the artery failed by using both fibrinolytics and IIb/IIIa inhibitors but succeeded with mechanical thrombectomy with a micro-snare. Pathologic analysis of the thrombus showed numerous ...
Gong Xi-ping - - 2006
BACKGROUND AND PURPOSE: Analysis of dynamic cerebral autoregulation during transient falls in blood pressure is considered a sensitive and convenient method for evaluating patients with carotid artery stenosis. To this point, there have been few reports on the efficacy of using the thigh cuffs technique to analyse middle cerebral artery ...
Takemura Akihiro - - 2006
To improve the accuracy and robustness of 2D/3D registration of digital subtraction angiography images and magnetic resonance angiography (MRA) data, we have developed an automatic method for anatomical labeling of the cerebral arteries in MRA data. The anatomical labeling method is a location-based method which segments an artery tree to ...
Jefferson A L - - 2006
Serial neurocognitive and perfusion MR imaging findings are described in the perioperative course of a 48-year-old woman with a superficial temporal artery to middle cerebral artery bypass for right hemispheric ischemia due to moyamoya syndrome. Neurocognitive testing reflected both global and focal cerebrovascular dysfunction, which suggests that perfusion augmentation following ...
Kim Ji Hyung - - 2006
We wanted to present our experiences for performing transradial cerebral angiography during the learning period, and we also wanted to demonstrate this procedure's technical feasibility and utility in various clinical situations. Thirty-two patients were enrolled in the study. All of them had unfavorable situations for performing transfemoral angiography, i.e., IV ...
Eftekhar Behzad - - 2006
Previous studies have proposed correlation between variants of the cerebral arterial circle (also known as circle of Willis) and some cerebrovascular diseases. Differences in the incidence of these diseases in different populations have also been investigated. The study of variations in the anatomy of the cerebral arterial circle may partially ...
Brancati Francesco - - 2005
We report on a 2 9/12-year-old boy with disproportionate short stature, microcephaly, subtle craniofacial dysmorphisms, and generalized skeletal dysplasia, who developed a left hemiparesis. Brain neuroimaging disclosed a complex cerebral vascular anomaly (CVA) with stenosis of the right anterior cerebral artery and telangiectatic collateral vessels supplying the cerebral cortex, consistent ...
De Reuck J - - 2005
The present study investigates whether cerebral infarction resulting from internal carotid artery occlusion by cervical dissection is due to emboli, released from a superimposed luminal thrombus, or is due to haemodynamic failure and hypoperfusion. Ten patients with a history of stroke and with a visible cerebral infarct on computed tomographic ...
Mullins Mark E - - 2005
The hyperdense artery sign on noncontrast head CT is thought to be one of the earliest and most useful signs of intra-arterial clot and probable (clinical) stroke. It should be evaluated in the context of the clinical scenario. Rigorous criteria should be applied in order to reduce potential false positives. ...
Kaspera Wojciech - - 2005
OBJECTIVE: The objective of this study was to assess the collateral circulation and blood flow velocity in arteries forming collateral circulation in patients with cerebral aneurysms and the occlusion of the brachiocephalic vessels. METHODS: Between 1989 and 2004 we examined a group of seven consecutive patients with diagnosed cerebral aneurysm ...
Tan Marilyn A - - 2006
INTRODUCTION: We report on the case of a 2-year 5-month-old girl with congenital heart disease who developed left middle cerebral artery occlusion and cerebral hemorrhagic infarction a day after ventricular septal defect patch closure. RESULTS: Cranial computed tomography scan revealed an acute hemorrhagic infarct over the left middle cerebral artery ...
Kizkin Sibel - - 2005
OBJECTIVE: The aim of the present study was to investigate hemodynamic changes in the medial cerebral artery and also the internal carotid artery in young women with polycystic ovary syndrome (PCOS) and polycystic ovaries (PCO). METHODS: Twenty-eight patients with PCOS, 16 patients with PCO and 24 healthy control subjects were ...
Yamashita Shiro - - 2005
A 29-year-old female presented with Basedow's disease manifesting as sudden vomiting, diarrhea, fever over 38 degrees C, transient aphasia, and numbness in her extremities. These symptoms were considered due to cerebral ischemia at a local clinic. Magnetic resonance angiography indicated stenosis of the bilateral distal internal carotid arteries and the ...
Choi Eun J - - 2005
The authors evaluated the involvement of large cerebral artery in 13 patients with cerebral autosomal dominant arteriopathy with subcortical infarcts and leukoencephalopathy (CADASIL) with angiography (12 MR and one conventional). Five patients (38%) showed stenosis: at the middle cerebral artery in three, vertebral artery in one, and the internal carotid ...
Cosottini Mirco - - 2005
BACKGROUND AND PURPOSE: Percutaneous transluminal angioplasty with stent (CAS) is an alternative method to endarterectomy in the revascularization of carotid artery stenosis. Protected CAS is currently used to prevent distal embolization. Diffusion-weighted MRI (DWI) is the most sensitive tool to evaluate silent cerebral ischemia. The purpose of this research was ...
Nardone R - - 2005
Congenital anomalies of the internal carotid arteries (ICA) and cerebral arteries have not been frequently reported. Moreover, in the literature there is no clear association between hypoplastic carotid and cerebral vessel systems and the occurrence of cerebral ischaemia. We report two cases of unilateral hypoplasia of the ICA affecting two ...
Dittmar Michael S - - 2005
In the intraluminal suture model of middle cerebral artery occlusion (MCAO) in the rat, lesions of the masticator muscles associated with impaired functional outcome occur. We evaluated the role of external carotid artery (ECA) transection. We assessed whether isolated interruption of an arterial or a venous connection to the ECA ...
Reyes E Castro EC Hospital General Universitario Gregorio Marañón, Madrid; Spain - - - 2005
Endovascular treatment of acute blockage of the middle cerebral artery may require a combination of mechanical recanalization and chemical fibrinolysis. Using a single microcatheter to perform both techniques helps shorten procedure time.
Kruuse Christina - - 2005
Sildenafil (Viagra), a selective inhibitor of phosphodiesterase 5 (PDE5), induces headache and migraine. Although previously supposed to be a "vascular" headache, no significant cerebral artery dilatation was found in vivo. Thus, we hypothesised that PDE5 may not be present or that sildenafil is less effective on the cGMP hydrolysis in ...
Kato Masayasu - - 2005
A 71-year-old man presented with right hemiparesis and aphasia due to cerebral infarction in the frontal lobe. Computed tomography (CT) revealed a high-density mass, 12 mm in diameter, in the stem of the left sylvian fissure. Carotid angiography demonstrated occlusion of the left ascending frontal artery complex and retention of ...
Hori Emiko - - 2005
Duplication of the middle cerebral artery is an anomalous vessel arising from the internal carotid artery. There have only been 14 reports of aneurysms arising from the origin of a duplication of the middle cerebral artery and 5 of these patients had multiple aneurysms. Aneurysms at this site have a ...
Lee Thomas C - - 2005
An acute intracranial embolus may be associated with a hyperdense artery sign on CT, related to acute thrombus within the affected artery, a phenomenon that is well known and has been extensively documented. We present an unusual case of a middle cerebral artery territory acute infarct with a hypodense artery ...
Takao Hidemasa - - 2005
A case of cerebral lipiodol embolism after transcatheter arterial chemoembolization (TACE) of hepatocellular carcinoma is presented. A 76-year-old man underwent TACE for advanced hepatocellular carcinoma. Immediately after chemoembolization, his level of consciousness deteriorated. Computed tomography revealed deposition of iodized oil in the cerebral cortex, basal ganglia, and thalami. Magnetic resonance ...
Mimura Masaru - - 2005
A 78-year-old housewife with major depression developed a right-sided infarction in the territory of the middle cerebral arteries, followed by acute post-stroke mania. Comparison between pre- and post-stroke SPECT scans demonstrated a unique pattern of left orbitofrontal hyperperfusion with extensive right frontal hypoperfusion. A functional imbalance between right and left ...
No Young J - - 2005
Transient ischemic attacks (TIAs) or ischemic stroke may complicate thromboangiitis obliterans (TAO). However, there has been debate regarding the mechanism of ischemic stroke in TAO. We report the case of a patient with TAO who developed repeated TIAs. An angiogram showed multiple alternative areas of arterial occlusions in the distal ...
van Laar Peter Jan - - 2006
The ability to visualize the perfusion territories of major feeding arteries to the brain is important for many clinical applications. Since the work of Duret in 1874 on vascularization of the brain, many textbooks and atlases have shown schematic drawings of the supply areas of the major cerebral arteries. Recent ...
Avci E - - 2005
OBJECTIVE: The main objective of this study was to display the morphological characteristics of the posterior communicating artery and its perforating branches in various configurations of the circle of Willis and their relationship with neighbouring anatomic structures by microscopic examination of the brain hemispheres and endoscopic examination of cadaver specimens. ...
Horiuchi Kazuomi - - 2005
OBJECT: The usefulness of motor evoked potential (MEP) monitoring to detect blood flow insufficiency (BFI) in the cortical branches of the middle cerebral artery (MCA) and lenticulostriate arteries (LSAs) during MCA aneurysm surgery was investigated based on the correlation between MEP and somatosensory evoked potential (SEP) monitoring. METHODS: Fifty-three patients ...
Oliveira J C D - - 2005
This study aimed at describing and systematizing the arteries of the base of the brain of the wild boar (Sus scrofa scrofa). Thirty-three heads were used, of which 30 were injected with latex, and three with acrylic dental resin through the common carotid arteries. The brain carotid artery arose from ...
Klopfenstein Jeffrey D - - 2005
Atherosclerotic middle cerebral artery stenosis is a rare but potentially devastating cause of cerebral ischemia and stroke. While medical management remains the mainstay for stroke prevention, surgical and/or endovascular intervention is indicated in selected patients. This article reviews the role of surgery and endovascular techniques in the treatment of middle ...
Jabbour Rosette - - 2005
OBJECTIVE: To report a case of proximal occlusion of 2 major cerebral vessels associated with moyamoya network circulation that manifested by spontaneous intraventricular hemorrhage. DESIGN: Case report. PATIENT AND RESULTS: A 36-year-old Syrian man presented with symptoms of sudden-onset headache, neck stiffness, and confusion. The computed tomography scan of his ...
Feekes Joel A - - 2005
Lacunar infarcts are commonly found in the basal ganglia, though little is known about the organization of small-scale microvascular territories that presumably subtend lacunae. We investigated microvascular territories of the lenticulostriate arteries, the recurrent artery of Heubner, the anterior choroidal artery, and striate branches of the anterior cerebral and anterior ...
Kazanci Ebru - - 2005
We reported a case of an 8-year-old boy who was presented to the emergency department with left-sided hemiparesis. Computed tomography showed hypodense areas in the territory of the right middle cerebral artery, indicating acute cerebral infarct. Diagnostic evaluation was performed to identify the etiology. On the eighteenth day of hospitalization, ...
Sun Fei - - 2005
While the intraluminal thread technique to induce middle cerebral artery occlusion is widely used in animal models of focal cerebral ischemia, it has several drawbacks. The present study describes a new technique involving transfemoral selective intraluminal wiring, and evaluates its technical feasibility, effectiveness, and safety. Twenty-four Wistar rats were used ...
Cekirge H Saruhan - - 2005
We report a unique case of an anterior cerebral artery aneurysm in a patient with embryonic unfused middle cerebral artery anomaly. The arterial twigs of the middle cerebral artery supply the entire middle cerebral artery territory including the lenticulostriate branches. There was a vessel incorporated into the aneurysm, which was ...
Johnson David M - - 2005
BACKGROUND AND PURPOSE: The most common presentation of ischemic stroke related to pregnancy is arterial occlusion, occurring during the third trimester or postpartum. The authors present the first successful administration of intra-arterial cerebral tissue plasminogen activator to treat an embolic cerebral vascular accident in a 37-week parturient resulting in complete ...
Murkin John M - - 2005
Despite an overall decrease in perioperative morbidity and mortality, evidence of some degree of central nervous system dysfunction associated with coronary artery bypass graft (CABG) surgery-with or without cardiopulmonary bypass-has steadily mounted. From preoperative studies of CABG patients, it is apparent that over 50% of patients who present for cardiac ...
Moro Nobuhiro - - 2005
A 46-year-old woman presented with non-traumatic anterior cerebral artery dissection manifesting as sudden onset of headache and motor weakness of the right lower limb. Angiography revealed luminal narrowing of the left anterior cerebral artery from the A(3) portion to the distal portion. Sagittal T(1)-weighted magnetic resonance imaging showed hyperintensity due ...
Pai S B - - 2005
BACKGROUND: The microsurgical anatomy of the middle cerebral artery (MCA) is of particular interest to the cerebrovascular surgeon. The purpose of this study was to define the microsurgical anatomy of the MCA and its various branches in the Indian population. METHODS: Ten MCAs were studied from five cadaveric brain specimens. ...
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