Search Results
Results 401 - 450 of 1828
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Schreuder Floris H B M - - 2009
BACKGROUND: Duplex ultrasonography is frequently used to select patients who are eligible for carotid endarterectomy by using local blood flow velocities to quantify the degree of internal carotid artery stenosis. However, ageing affects flow velocities and might hence influence the accuracy of duplex ultrasonography, as explored in the present study. ...
Sadikin Cindy - - 2008
Summary: We report a case of a 59-year-old man who presented with an acute stroke involving the territory of his left middle cerebral artery, and who was treated with combined systemic and intraarterial thrombolysis. After these treatments, the segment remained stenotic. An urgent intracranial angioplasty was performed, resulting in satisfactory ...
Watanabe Arata - - 2008
Oculomotor nerve palsy is very rare as the only manifestation of internal carotid artery (ICA) occlusion, and the angiographic findings have not been described in detail. We present a case of ipsilateral ICA occlusion manifesting as only sudden onset of oculomotor nerve palsy. Cerebral angiography showed occlusion of the ICA ...
Fichet Jérôme - - 2008
Stroke is a rare but severe event after acute coronary syndrome. Relations between both arterial territories are still discussed but prevalence of asymptomatic carotid stenosis potentially implicated in the mechanism of stroke is under-investigated. This study aimed to determine the prevalence of asymptomatic carotid stenosis in that population and review ...
Uretsky Scott - - 2008
PURPOSE OF REVIEW: To summarize the randomized trial data comparing carotid endarterectomy with carotid artery stenting and describe ischemic visual symptoms and their presentation to ophthalmologists. RECENT FINDINGS: Carotid stenosis, symptomatic and asymptomatic, is prevalent and is a significant cause of stroke. Timely evaluation and intervention are important in stroke ...
Kizer Jorge R - - 2008
Despite increasing sophistication of brain imaging, neurovascular evaluation, and laboratory testing, a sizable proportion of ischemic strokes defy etiologic classification. Many, if not most, of such 'cryptogenic' strokes may stem from unrecognized cardiac or aortic embolism, with a bimodal pathophysiology potentially dominated by interatrial septal abnormalities in young adults, and ...
Pfeiffer Jens - - 2008
OBJECTIVES/HYPOTHESIS: Pronounced anatomic variations of the extracranial internal carotid artery (ICA) can be found in 5% to 6% of the general population. An aberrant ICA is at risk of injury during routine pharyngeal procedures if the vessel is placed into close relationship with the pharyngeal wall. The objective was to ...
Jaff Michael R - - 2008
Stenosis of the internal carotid artery represents a major cause of stroke, with atherosclerosis representing the major pathophysiology of this stenosis. It is estimated that over 700,000 Americans suffer a stroke annually. A prompt and accurate diagnosis of carotid artery disease is critical when planning a therapeutic strategy. Physical examination ...
Song Tae Jin - - 2008
Rapid arterial rethrombosis is associated with high-grade residual stenosis and usually occurs at the site of the initial occlusion, resulting in reocclusion of the recanalized artery. Platelets may play an active role in such rethrombosis after thrombolytic-induced clot lysis. Given that glycoprotein IIb/IIIa receptor blockers, like tirofiban, prevent thrombus formation ...
Skjelland Mona - - 2009
BACKGROUND AND PURPOSE: Cerebral microembolic signals detected by transcranial Doppler are frequent during carotid angioplasty with stenting and carotid endarterectomy (CEA). Their potential harmful effects on the brain are, however, unclear. The aim of this study was to relate the frequency and type of per-procedural microembolic signals to procedure-related ipsilateral ...
Wessels Tiemo - - 2008
PURPOSE: To determine the value of color Doppler sonography (CDUS) in the diagnosis and follow-up of patients with extracranial and intracranial vertebral artery (VA) dissection. METHOD: Thirty-three patients aged 42 +/- 12 years with 40 VADS confirmed via digital subtraction angiography (DSA) (n = 37) and magnetic resonance angiography (MRA) ...
Furuse Motomasa - - 2008
Intracerebral haemorrhage accompanied with cervical internal carotid artery (ICA) occlusion on the same side without moyamoya-like vessels is rare. A 73-year-old man with left ICA occlusion and no presence of moyamoya disease criteria underwent xenon-enhanced computed tomography with acetazolamide challenge test. The findings showed hypoperfusion and no vasoreactivity in the ...
Kanazawa R - - 2008
A 68-year-old male presented with a syncopal attack subsequent to acute myocardial infarction. His ultrasonographic and radiological examination revealed severe left internal carotid artery (ICA) stenosis and the presence of a persistent primitive hypoglossal artery (PPHA) immediately distal to the stenosis. The bilateral anterior and left middle cerebral arteries, and ...
Sorteberg Angelika - - 2008
OBJECTIVE: Treatment of certain cerebral aneurysms, caroticocavernous fistulae, and tumors of the neck or cranial base may involve therapeutic arterial sacrifice, which requires preoperative knowledge of the feasibility of permanent occlusion of the internal carotid artery (ICA) or vertebral artery or arteries. METHODS: Retrospective study of transcranial Doppler ultrasonography-monitored angiographic ...
Abou-Chebl Alex - - 2009
BACKGROUND: Strokes from large-vessel atherosclerotic occlusions or severe stenoses are often resistant to re-canalization with thrombolytic agents. As in acute coronary syndromes, angioplasty and stenting for stroke may be used to achieve timely reperfusion with possibly less risk for hemorrhagic complications. METHODS: From a prospectively collected database, we have retrospectively ...
Ozdemir A Ozcan - - 2008
BACKGROUND: Patent foramen ovale (PFO) is an independent risk factor for cerebral infarction. Since ~25% of the population have a PFO, the simple association of PFO with stroke is not enough to establish the diagnosis of paradoxical embolism. We evaluated possible clinical clues to the diagnosis of paradoxical embolism. METHODS: ...
Aladdin Yasser - - 2009
BACKGROUND: Intracranial atherosclerotic stenosis is thought to be responsible for 8% of all ischemic stroke subtypes. Transcranial Doppler (TCD) ultrasonography allows for noninvasive and dynamic evaluation of the cerebral circulation within the circle of Willis. We present a case of recurrent, orthostatic transient ischemic attacks in which, using TCD, we ...
Mazzucco S - - 2009
BACKGROUND AND AIMS: Flow mediated dilation (FMD) of peripheral conduit arteries is a well-established tool to evaluate endothelial function. The aims of this study are to apply the FMD model to cerebral circulation by using acetazolamide (ACZ)-induced intracranial vasodilation as a stimulus to increase common carotid artery (CCA) diameter in ...
Gupta Rishi - - 2009
OBJECTIVE AND IMPORTANCE: Mechanical maneuvers are being utilized more frequently to treat large artery occlusion responsible for acute ischemic stroke. Vasospasm due to vessel irritation during interventions may represent an etiology of poor recanalization in some patients. CASE REPORTS: This report describes 2 patients who developed arterial vasospasm at the ...
Manabe Susumu - - 2008
OBJECTIVE: It is well known that the presence of carotid artery stenosis increases the risk of perioperative stroke in patients undergoing cardiac surgery with cardiopulmonary bypass. Although off-pump coronary artery bypass grafting (CABG) can avoid the adverse effects of cardiopulmonary bypass, the influence of carotid artery stenosis on the incidence ...
Horrow Mindy M - - 2008
Hemodynamically significant stenosis of the internal carotid artery (ICA) is usually diagnosed by elevated velocities in a region of luminal narrowing. Many other significant diagnoses can be made based upon lower-than-normal velocities. Analysis of the combinations of low ICA velocity, abnormal ICA waveform, and abnormal velocities and waveforms in ipsilateral ...
Allendoerfer J - - 2008
In the last decade transcranial color-coded sonography (TCCS) was established as a routine in neurovascular departments for the evaluation of brain-supplying vessels in cerebrovascular diseases. TCCS has demonstrated feasibility and validity for the evaluation of the basal cerebral arteries, especially for the middle cerebral artery (MCA). In some patients an ...
Resende Luiz Antonio de Lima - - 2008
Stroke was probably first described in Psalms 136: 5-6 of the Catholic Bible, and Psalms 137:5-6 of the Evangelical Bible. Based on the Portuguese, Spanish, English, German, Dutch, Russian, Greek, and original Hebrew Bible, the significance of this Psalm is the invocation of a punishment, of which the final result ...
Forsberg Flemming - - 2008
OBJECTIVE: The purpose of this study was to compare peak systolic velocities (PSVs) and the degree of stenosis obtained with a real-time 3-dimensional (ie, 4-dimensional) Doppler ultrasound scanner (Encore PV; VueSonix Sensors Inc, Wayne, PA) to conventional Doppler ultrasound imaging of the carotid arteries (common [CCA], internal [ICA], and external ...
Sengelhoff Christian - - 2008
OBJECTIVE: Neurovascular ultrasound (nUS) is widely used as a screening and monitoring tool in patients with spontaneous cervical artery dissection (sCAD). The aim of the study was to describe the sonographical course of the affected arteries in patients with a MRI-proven sCAD by repetitive nUS. METHODS: Thirty-seven consecutive patients aged<60 ...
Braun Ryan M - - 2008
Carotid duplex Doppler ultrasound (CDDU) is increasingly used for the evaluation of internal carotid artery (ICA) stenosis. In CDDU, velocity measurements are used to estimate the degree of ICA stenosis. Traditionally, radiologists have relied on institutional experience and published research when interpreting CDDU. In 2003, a consensus committee of experts ...
Chang Wei-Lun - - 2008
PURPOSE: Hypereosinophilic syndrome is a rare disorder which can cause ischemic stroke. Although cardioembolism is acknowledged as the most common etiology for stroke, the underlying pathogenesis of hypereosinophilic syndrome could be heterogeneous. Herein we describe a patient with persistent hypereosnophillia with recurrent strokes focusing on the pathogenetic mechanism of stroke. ...
Sorteberg Angelika - - 2008
OBJECTIVE: Treatment of certain cerebral aneurysms, caroticocavernous fistulae, and tumors of the neck or cranial base may involve therapeutic arterial sacrifice, which requires preoperative knowledge of the feasibility of permanent occlusion of the internal carotid artery (ICA) or vertebral artery or arteries. METHODS: Retrospective study of transcranial Doppler ultrasonography-monitored angiographic ...
Diener H C - - 2008
Headache often accompanies acute ischemic stroke. Observational studies indicate that 15 to 40% of patients with acute ischemic stroke report headache in close temporal relation to the event. The onset headache is more often seen in posterior circulation strokes than in strokes in other vascular territories. Transient ischemic attacks (TIA) ...
Hiu Takeshi - - 2008
Percutaneous transluminal angioplasty with stenting (PTA/stenting) for intracranial atherosclerotic stenoses is usually performed without any protection devices. We report a unique case of atherothrombotic stenosis with the vulnerable plaque in the cavernous portion of the internal carotid artery (ICA), which was successfully treated by PTA/stenting under cerebral protection with the ...
Wintermark Max - - 2008
OBJECTIVE: To identify a set of computed tomographic (CT) features of carotid atherosclerotic plaques that is significantly associated with ischemic stroke. METHODS: In a cross-sectional study, we retrospectively identified 136 consecutive patients admitted to our emergency department with suspected stroke who underwent a CT-angiogram of the carotid arteries. CT-angiographic studies ...
Long Quan - - 2008
This numerical study aims to investigate the capacity of the circle of Wills (CoW) to provide collateral blood supply for patients with unilateral carotid arterial stenosis. The basic 3D geometry of the CoW was reconstructed based on a magnetic resonance angiogram of a normal human subject. A total of 52 ...
Pipinos Iraklis I - - 2009
Internal carotid artery (ICA) flow reversal is an effective means of cerebral protection during carotid stenting. Its main limitation is that in the absence of adequate collateral flow it may not be tolerated by the patient. The purpose of this study was to determine if preoperative identification of intracranial collaterals ...
Ansel Gary M - - 2008
Stroke is one of the most significant causes of death and morbidity worldwide. Atherosclerotic stenosis of the extracranial internal carotid artery has been invoked as a common causative factor for stroke in over 20% of patients. Although medical therapy can help to prevent the onset and progression of carotid arteriosclerosis, ...
Takayama Katsutoshi - - 2008
PURPOSE: No filter protection devices for carotid artery stenting (CAS) have been formally approved for use in Japan; however, as of April 2008, the Angioguard XP (AGXP) was approved. This article describes our initial results using the AGXP during CAS for the treatment of carotid artery stenosis. MATERIAL AND METHODS: ...
Paukovits Tamás Mirkó - - 2008
To assess primary success and safety of percutaneous transluminal angioplasty (PTA) and/or stenting of ostial/proximal common carotid artery lesions (pCCA) and to compare its 30-day stroke/mortality level with the literature data for surgical options. A total of 147 patients (153 stenoses, 6 recurrent) (71 female; 121 left) with significant diameter ...
De Silva Deidre Anne - - 2008
INTRODUCTION: Coronary artery disease (CAD) is the leading cause of death following ischaemic stroke. We aimed to study the prevalence and associations of concomitant CAD among ischaemic stroke patients in Singapore. MATERIALS AND METHODS: We prospectively studied 2686 consecutive Asian ischaemic stroke patients. RESULTS: CAD was prevalent among 24% of ...
Ibrahim Shahnaz Hamid - - 2008
Perinatal arterial ischaemic strokes are a major cause of morbidity in the neonatal period and leads to significant neurological morbidity. It is however under recognized as an entity and usually missed till the baby is 3-4 months of age when they first present with hemiplegia. Perinatal arterial ischaemic strokes are ...
AbuRahma Ali F - - 2008
The optimal duplex ultrasound (DUS) velocity criteria to determine in-stent carotid restenosis are controversial. We previously reported the optimal DUS velocities for >or=30% in-stent restenosis. This prospective study will further define the optimal velocities in detecting various severities of in-stent restenosis: >or=30%, >or=50%, and 80% to 99%. The analysis included ...
Telman Gregory - - 2008
Sixty-five years old patient suffering from acute stroke was treated by rTPA intravenously. TCD monitoring of both middle cerebral arteries (MCA) was carried out simultaneously with administration of rTPA. Seven microemboli were found in right and four in left MCA. Duplex ultrasound, CT angiography and digital subtractional angiography revealed occlusion ...
van Prehn J - - 2008
PURPOSE: Clinical decision making for carotid surgery depends largely upon stenosis grade. While digital subtraction angiography remains the gold standard for stenosis grading, many physicians use less invasive modalities. The purpose of this study was to compare the results of multidimensional Computed tomography (CTA) with ultrasound (US) grading and peak ...
Kang Suk Y - - 2008
BACKGROUND: Stroke mechanisms and clinical features of anterior cerebral artery (ACA) territory infarction have rarely been investigated using MRI. OBJECTIVES: To verify stroke mechanisms and to make clinical imaging correlation. METHODS: Clinical, MRI, and angiographic findings of 100 consecutive patients with ACA infarction were studied. RESULTS: Motor dysfunction (n = ...
Ozdemir O - - 2008
BACKGROUND AND PURPOSE: Cervical internal carotid artery (ICA) occlusion with middle cerebral artery (MCA) embolic occlusion is associated with a low rate of recanalization and poor outcome after intravenous thrombolysis. Prompt revascularization is required to prevent disabling stroke. We report our experience on acute ischemic stroke patients with tandem ICA ...
Ovbiagele Bruce - - 2008
Little is known about short-term vascular risk after transient ischemic attack (TIA) caused by intracranial atherosclerosis. To quantify the early risk of ischemic stroke in the territory of a stenotic intracranial artery after TIA and to identify clinical and imaging features associated with increased risk of stroke in the territory ...
Ogata Jun - - 2008
OBJECTIVE: This study was designed to determine the histopathological characteristics of cardiac and vascular lesions responsible for various subtypes of ischemic stroke. METHODS: Postmortem pathological examination was performed on 142 patients who died within 30 days of the onset of ischemic stroke in the National Cardiovascular Center, Osaka, Japan. RESULTS: ...
Yang Eric H - - 2008
Stroke is one of the leading causes of morbidity and mortality in the United States. Approximately 700,000 Americans suffer from a stroke per year and 270,000 of these patients will die as a result of their stroke. The etiology of cerebrovascular events can be attributed to carotid artery disease in ...
Fernández-Seara María A - - 2008
An improved arterial spin labeling (ASL) perfusion technique that combines pseudo-continuous labeling and a T2*-insensitive sequence (GRASE) with background suppression was used to acquire perfusion maps in normal volunteers and stroke patients. It is shown that perfusion measurements obtained in less than 1 min of scan time are reproducible, with ...
Imamura Hiroshi - - 2008
When undertaking portal vein embolization (PVE) in patients with hepatocellular carcinoma (HCC), the following possibilities should be considered: (1) failure to induce hypertrophy of the nonembolized segments due to the underlying liver disease, (2) acceleration of tumor growth by occlusion of the portal venous flow because HCC is a hypervascular ...
Shaalan Wael E - - 2008
Reliability of the most commonly used duplex ultrasound (DUS) velocity thresholds for internal carotid artery (ICA) stenosis has been questioned since these thresholds were developed using less precise methods to grade stenosis severity based on angiography. In this study, maximum percent diameter carotid bulb ICA stenosis (European Carotid Surgery Trial ...
Tang Sung-Chun - - 2008
Impaired dynamic cerebral autoregulation (DCA) has been shown in patients with severe (> or =70%) internal carotid artery (ICA) stenosis, but DCA in moderate (50% to 69%) ICA stenosis, especially its response to carotid revascularization, has rarely been reported. Our study aimed to characterize DCA in severe and moderate ICA ...
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