Search Results
Results 451 - 500 of 1622
< 5 6 7 8 9 10 11 12 13 14 15 >
Kim Sang-Dae - - 2008
Spontaneous spinal subdural hematoma (SDH) is an uncommon cause of acute spinal cord compression. When it does occur, however, it may have disastrous results and a poor prognosis. The nontraumatic acute spinal SDH usually results from a defect in a hemostatic mechanism (such as coagulopathy or the use of anticoagulant ...
Simsek Serkan - - 2008
The sulcus of the vertebral artery is located behind the lateral mass of the atlas and in some cases is converted into a foramen by anomalous ossification known as the posterior ponticulus (osseous bridge). This study involved anatomical observations of 158 isolated anatomical specimens of dry C1 vertebrae. The incidence ...
Siddiqui A - - 2008
Here, we describe neuroimaging findings of an unusual case of severe vertebrobasilar dolichoectasia producing obstructive hydrocephalus. CT and MRI performed in a 71-year-old woman presenting with clinical features of raised intracranial pressure revealed severely ectatic and tortuous vertebral and basilar arteries. The ectatic basilar artery was causing compression and flattening ...
Hong Michael K-Y - - 2008
OBJECT: The angiosome concept has been the subject of extensive research by the senior author (G.I.T.), but its specific applicability to the spinal cord was hitherto unknown. The aim of this study was to see if the spinal cord vasculature followed the angiosome concept and to review the usefulness of ...
Shirakawa Manabu - - 2008
A 58-year-old man presented with a traumatic vertebro-vertebral arteriovenous fistula (VVAVF) after attempting suicide by thrusting scissors into his right anterior cervical region. Two months later he noticed weakness and numbness of the right upper extremity. Examination revealed bruit in the right neck, no cranial nerve palsy, and weakness of ...
Mercier P H PH Laboratoire d'Anatomie, Faculté de Médecine, Angers cédex, France - - - 2008
This study of 25 brains at the pontomedullary junction defined the different possible origins of the perforating arteries and lateral spinal arteries in relation to the posterior inferior cerebellar arteries (PICAs). - If the PICA emerges from the common trunk of the AICA-PICA coming from the basilar artery, it never ...
Gdynia Hans-Jürgen - - 2008
Dissections of the carotid or vertebral arteries are a significant cause of ischemic stroke. Their etiology includes not only mechanical forces but also underlying arteriopathies such as Ehlers-Danlos syndrome type IV and other connective tissue disorders. Furthermore, dissections often occur spontaneously or after minor trauma in otherwise healthy individuals without ...
Ucerler H - - 2008
The conventional approach to the fourth ventricle is by splitting the vermis on the suboccipital surface of the cerebellum. By a unilateral transcerebellomedullary fissure approach, it is possible to provide sufficient operative space from cerebral aqueduct to obex without splitting the vermis. This approach needs meticulous dissection of the cerebellomedullary ...
Park J S - - 2008
BACKGROUND: The aim of this study was to report further investigation of neurovascular compression as a cause of hemifacial spasm (HFS) and to provide useful surgical guidelines by describing the compression patterns. MATERIAL AND METHODS: From January 2004 to February 2006, 236 consecutive patients with HFS underwent microvascular decompression (MVD) ...
Petridis A K - - 2008
We report a patient who suffered drop attacks during head reclination. Computer tomography of the cervical spine demonstrated a stenotic right vertebral artery at C4/5. However, Doppler ultrasonography of the vertebral artery showed no abnormality. Angiography confirmed complete occlusion of the left vertebral and a stenosis of the right vertebral ...
Baracchini Claudio - - 2008
BACKGROUND AND PURPOSE: The etiology of spontaneous cervical artery dissection (sCAD) is still unknown, even though an underlying arteriopathy impairing vasomotion has often been suspected. This study was undertaken to investigate: (1) spontaneous, (2) endothelial-dependent, and (3) endothelial-independent vasodilation in patients with multiple sCAD. METHODS: In 19 consecutive patients with ...
Marti Sarah - - 2008
Whether the rotational vertebral artery syndrome (RVAS), consisting of attacks of vertigo, nystagmus and tinnitus elicited by head-rotation induced compression of the dominant vertebral artery (VA), reflects ischemic dysfunction of uni- or bilateral peripheral or central vestibular structures, is still debated. We report on a patient with bilateral high-grade carotid ...
Zhao Liujun - - 2008
STUDY DESIGN: This study assessed the relationship of the vertebral artery and the transverse foramens in the lower cervical spine by computer tomographic angiography (CTA) measurements. OBJECTIVE: To study the location and the size of the vertebral artery in relation to the transverse foramens in the lower cervical spine. SUMMARY ...
Horiuchi Tetsuyoshi - - 2008
BACKGROUND: Intraoperative cerebral angiography has been known as a useful tool for diagnosing neurovascular diseases. There are few reports of intraoperative angiography in the prone position. Intraoperative angiograms through the occipital artery and muscular branch of the vertebral artery have not also previously been described. METHODS: The occipital artery or ...
Gupta Tulika - - 2008
BACKGROUND: The location of the vertebral artery on a groove on the superior surface of the posterior arch of atlas makes it vulnerable to injury during surgical procedures in this region. Knowledge of the quantitative anatomy of the vertebral artery groove is therefore necessary. METHODS: In 55 dry adult atlas ...
Songur Ahmet - - 2008
AIM: The aim of our study was to demonstrate some possible variations in the vertebrobasilar system (VBS) in the Turkish population and to compare our results with the literature. MATERIALS AND METHODS: The VBS samples were taken from 109 fresh forensic autopsies and one anatomic cadaver. The widths of the ...
Son Kuk Hui - - 2008
Percutaneous vertebroplasty is a minimally invasive technique that is used to treat vertebral fractures, tumors and osteolytic vertebral metastases. However, cement leakage to the venous system is a potential source of serious complications after percutaneous vertebroplasty. We report a 65-year-old female patient who demonstrated cardiac perforation, pulmonary cement embolism, and ...
Cerrato Paolo - - 2008
Cervical artery dissection is an important cause of stroke in young patients and accounts of 10%-20% of stroke or TIA in patients aged less than 50 years. Basilar artery occlusion (BAO) is an infrequent cause of acute stroke, which invariably leads to death or long-term disability if not recanalized. We ...
Kakino Shunsuke - - 2008
BACKGROUND: Symptomatic atherosclerotic steno-occlusive diseases of the vertebrobasilar artery portend a poor prognosis and high risk of stroke recurrence despite medical therapy. We describe 5 medically refractory patients with occlusion at the origin of the VA and the distal portion of the cervical VA perfused via muscular collateral vessels who ...
Barth P G - - 2008
We report a case of congenital brainstem disconnection including the second detailed autopsy. A full-term newborn presented with irreversible apnoea and died on the fifth day. MRI revealed disconnection of the brainstem. The autopsy included a series of transverse sections of the mesencephalon, medulla oblongata and bridging tissue fragments. A ...
Lim Sang Ho - - 2008
Percutaneous vertebroplasty is a minimally invasive procedure in which polymethylmethacrylate polymer is used to treat painful diseased vertebral bodies. However, despite its minimally invasive nature and relative safety, cement leakage beyond involved vertebral bodies into the venous system can induce devastating cardiovascular complications. Here, the authors report a case of ...
Compter A - - 2008
BACKGROUND: Twenty to 30 percent of all transient ischaemic attacks and ischaemic strokes involve tissue supplied by the vertebrobasilar circulation. Atherosclerotic stenosis >/= 50% in the vertebral artery accounts for vertebrobasilar stroke in at least one third of the patients. The risk of recurrent vascular events in patients with vertebral ...
AteĊŸ Ozkan - - 2008
OBJECT: The microsurgical anatomy of the occipital artery (OA) was studied to describe the diameter, length, and course of this vessel as it pertains to revascularization procedures of the posterior cerebral circulation. METHODS: The authors studied 12 OAs in 6 cadaveric heads that had been injected with colored latex. They ...
Kubikova E - - 2008
This study presents and describes the variation of the vertebral artery arising from the aortic arch as a case report. This variation was found in one of the cadavers at the Institute of Anatomy of Medical Faculty of Comenius University in Bratislava. Anomalous arising was discovered during the student's dissection ...
Wynd Shari - - 2008
BACKGROUND: Serious adverse events such as cervical artery dissection (CAD) have been reported to occur following cervical spine manipulation therapy (cSMT). To investigate the relation between these events, we utilized an animal model to determine if vertebral arteries with a suspected susceptibility factor (wall lesion) could be injured further by ...
Lescanne Emmanuel - - 2008
The microanatomy of the cerebellopontine cistern (CPC) is of interest to many surgeons and has been the subject of controversial works especially concerning the study of the subarachnoid space in the internal acoustic meatus (IAM). The CPC lies in the cerebellopontine angle between the brainstem, cerebellum and petrous bone. It ...
Manninen Hannu - - 2008
BACKGROUND: The aim of this study was to assess hemodynamic consequences of increasingly common coverage of the left subclavian artery (LSA) during endovascular stent-graft repair for thoracic aortic disease without surgical revascularization. We considered that critical arteries to examine are the right vertebral artery and posterior communicating arteries (PComA) because ...
Nguyen T N - - 2008
After occlusion of flow in an artery, further ischaemic episodes are not expected due to lack of a flow conduit to carry the embolus. In the carotid stump syndrome, ongoing ischaemic events may continue due to collateral flow via the external carotid artery. We report two patients presenting with posterior ...
Tabatabai Ghazaleh - - 2008
Spinal manifestations of vertebral artery dissection (VAD) are rare events and are typically symptomatic with neck pain and ischemic brain injury. We report a patient presenting with unusual peripheral paresis of the right upper limb due to an intramural hematoma of the right vertebral artery with local compression of C5 ...
Ralea Ionela-Camelia - - 2008
Intracranial angioplasty stenting may be an efficient therapy in patients with intracranial atherosclerotic symptomatic vertebrobasilar artery stenosis unresponsive to optimal medical therapy. We present our experience in this setting. The study included 12 cases (8 men, 4 women), with an age range of 43-78 years (mean 62.6 years). Intracranial stenosis ...
Lee Sung Ik - - 2008
The dissection of the intracranial vertebral artery (VAD) is a common cause of young age brain stem stroke. VAD can be detected by conventional angiography, but there is yet no agreement on the most effective tool to use for the detection of VAD. Here, we report a patient with VAD, ...
Meguro T - - 2007
Here, we present a case of an unusual variant of a persistent primitive hypoglossal artery, which was found incidentally during an examination for a hypertensive thalamic haemorrhage. The anastomotic vessel arose from the external carotid artery and joined the vertebral artery through the hypoglossal canal. The embryology of the anomaly ...
Lin Jainn-Jim - - 2007
Posterior circulation infarction is uncommon in children. Vertebral artery dissection is an unusual cause of posterior circulation infarction in children. We report on a 12-year-old boy with spontaneous left-extracranial vertebral artery dissection associated with isolated ipsilateral superior cerebellar artery territory infarction, diagnosed clinically and by brain computed tomography, magnetic resonance ...
Civelek Erdinc - - 2007
OBJECT: The authors undertook a study to explore the topographic anatomical features seen during the anterolateral approach to cervical spine, anatomical variations, and certain landmarks related to the surgical procedure. METHODS: The study was conducted in 30 fresh cadavers. RESULTS: The common carotid artery bifurcation was mostly found at the ...
Mukherjee Debabrata - - 2007
Atherosclerosis is the commonest cause of vertebral artery stenosis and has a predilection for the origin and proximal section of the extracranial portion of the vessel and also the intracranial portion of the vessel. Although it has generally been thought that extracranial vertebral artery (ECVA) disease has a more benign ...
Ren Xianjun - - 2007
BACKGROUND: Two-dimensional time-of-flight (2D TOF) magnetic resonance angiography (MRA) is the major method for detecting vertebral artery injury (VAI). But there is still controversy over MRA's accuracy in detecting VAI of varying degrees, a technique for which there are no animal studies found in the literature. The purpose of this ...
Kim Hyun-Jung - - 2007
The dorsolateral medullary syndrome (Wallenberg's syndrome) is produced by infarction of a wedge of lateral medulla posterior to the inferior olivary nucleus, and is usually caused by vertebral artery occlusion. Ipsilateral axial lateropulsion as an initial symptom of vertebral artery occlusion is rare, and the responsible anatomical structure is still ...
Pereira V M VM Service de Neuroradiologie Diagnostique et Thérapeutique, Hôpital de Bicetre, Le Kremlin-Bicetre, Paris, France - Department of Neuroradiology, University of Sao Paulo, Brasil - - - 2007
Neurofibromatosis type 1 (NF-1) is one of the most common inherited diseases and as an autosomal dominant genetic disorder results from NF-1 gene mutation with 100% penetration and wide phenotypic variability. The disease can involve a wide variety of tissues derived from all three embryonic layers. NF-1 vasculopathy has been ...
Dissanayake P H PH Department of Neuroradiology, Institute of Neuroscience, Southern General Hospital, Govan Road, Glasgow, UK - - - 2007
This report describes a unique case of triplication of the terminal left vertebral artery, forming the basilar artery in a 75-year-old male. CT angiography of cranio-cervical vessels also demonstrated the right vertebral artery originating from the right common carotid and an aberrant right subclavian artery.To the best of our knowledge ...
Mazzuca Michel - - 2007
We present the first video-EEG documentation, with ECG and EMG features, of stretch syncope of adolescence in a young, healthy 16-year-old boy. Stretch syncope of adolescence is a rarely reported, benign cause of fainting in young patients, which can be confused with epileptic seizures. In our patient, syncopes were self-induced ...
Cosar Murat - - 2008
Vertebral arteries form the basilar artery at the pontobulbar junction. The vertebral artery may have dominancy in one of them. The branches of basilar arteries supply blood for the vestibular nuclei and its connections. Vertigo is seen generally in the upper middle aged patients. Vertigo can be observed in dolichoectasia ...
Kwon Bae Ju - - 2007
OBJECTIVE: The aim of this study was to evaluate the anatomic details and therapeutic implications of the double origin of the posteroinferior cerebellar artery (DOPICA). METHODS: A total of 131 patients with intracranial posterior circulation aneurysms were consecutively treated using endovascular techniques during an 8-year period. We retrospectively searched the ...
Tabatabai Seyed Ali Fakhr - - 2007
OBJECTIVE: Aneurysms of the extracranially originating posterior inferior cerebellar artery are very rare. An anatomic insight of its possible course and variations is necessary when confronting such extraordinary lesions. CLINICAL PRESENTATION: A 19-year-old man presented with the sudden onset of severe headaches. A physical examination was positive only for neck ...
Gokduman Cem Atilla - - 2007
Aneurysms of the posterior inferior cerebellar artery (PICA) are rare, and may arise in unusual locations due to the complex and variable anatomy of this artery. The PICA does not usually originate from the extracranial vertebral artery. Of the few reported extracranial PICA aneurysms, all affected the distal segment. We ...
Dodick D W - - 2008
Migraineurs with frequent aura (>or=1 per month) are at a 12-fold increased risk of posterior circulation infarctions. Although the mechanism is unclear, these lesions are located in the arterial borderzone of the cerebellum. This case illustrates, for the first time, crossed cerebellar diaschisis in a patient with migraine with prolonged ...
Dabus Guilherme - - 2008
BACKGROUND: Vertebrobasilar insufficiency caused by head rotation is an uncommon event. The mechanism is obstruction of the vertebral artery resulting in flow limitation or, less frequently, thromboembolism. CASE DESCRIPTION: A 41-year-old male developed dizziness and light-headedness during chiropractic manipulation when his head was turned to the extreme right position. Computed ...
Eluvathingal Muttikkal T J - - 2007
Persistent trigeminal artery (PTA) is the most frequent type of persistent primitive carotid-basilar artery anastomoses. Persistent trigeminal artery is usually associated with small or absent posterior communicating artery (Pcom). It may also be associated with hypoplastic vertebral and basilar arteries. Patients may present with symptoms related to hypo-perfusion of posterior ...
Hassan A - - 2007
Acute vertebrobasilar artery occlusion is a life-threatening event, even after thrombolytic treatment with local intraarterial (IA) recombinant tissue plasminogen activator. We report a 70-year-old man with acute vertebral artery occlusion in which IA thrombolysis resulted in partial recanalisation and revealed pre-existing severe stenosis as the underlying cause. Stenosis was managed ...
Lee June Ho - - 2007
A significant drawback of atlantoaxial transarticular screw fixation is a potential risk of vertebral artery injury, especially with a high-riding type. The authors propose a relatively safe trajectory in cases of high-riding vertebral artery by using the 3-dimensional computerized tomography image reconstruction programs. Twelve consecutive patients with a pathologic condition ...
Burger I M - - 2007
BACKGROUND AND PURPOSE: Bilateral vertebrobasilar junction agenesis is an exceptional anatomic variation. This article explores the angiographic characteristics of this variant and its embryologic mechanisms. MATERIALS AND METHODS: Two observations of bilateral agenesis of the vertebrobasilar junction are reported. A case of atheromatous disease of the vertebrobasilar junction is shown ...
< 5 6 7 8 9 10 11 12 13 14 15 >