Search Results
Results 651 - 700 of 1012
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Fujimoto K - - 1996
BACKGROUND AND PURPOSE: Fine structural studies were performed to investigate the histogenesis of human intracranial arteries. Special attention was paid to whether "medial defects" exist in these arteries. METHODS: Segments of the intracranial extracerebral arteries of normal human embryos (n=6) were examined with transmission electron microscopy. RESULTS: Focal defects of ...
Liu H M - - 1996
BACKGROUND AND PURPOSE: We attempted to evaluate the location of vascular lesions in cases of cerebrovascular steno-occlusive diseases in Chinese persons living in Taiwan. METHODS: With three-dimensional time-of-flight magnetic resonance angiography (MRA) as a screening tool, 108 symptomatic patients with cerebrovascular steno-occlusive diseases were examined. Cardioembolic disease and cerebral hemorrhage ...
Uehara T - - 1996
BACKGROUND AND PURPOSE: The purpose of this study was to elucidate the prevalence and degree of asymptomatic occlusive lesions in the carotid and intracranial arteries in Japanese patients with ischemic heart disease (IHD). METHODS: We performed carotid and intracranial MR angiography (MRA) on 67 patients (49 men, 18 women; age ...
Pascual-Castroviejo I - - 1996
PURPOSE: To describe the vascular and nonvascular intracranial and extracranial anomalies associated with hemangiomas and vascular malformations of the face, neck, and/or chest. METHODS: Seventeen patients had a physical examination and imaging studies consisting of one or more of the following: pneumoencephalography, conventional carotid and vertebral arteriography, CT, MR imaging, ...
Rutherfoord G S - - 1996
This report describes the autopsy findings in three cases of closed head injury dying of cerebral infarction, with brain swelling and herniation. In each instance the cause of the infarct was found to be subintimal dissection involving intracranial anterior circulation arteries. The autopsy findings underscore the value of histological examination ...
Wardlaw J M - - 1996
"Color Doppler energy" (or "power Doppler"), a new color Doppler ultrasound technique that is independent of flow direction and very sensitive to movement, was assessed for its use in the identification of intracranial aneurysms in patients with recent subarachnoid hemorrhage immediately prior to using cerebral angiography. Features that identified aneurysms ...
Griewing B - - 1996
The present study was undertaken to assess the clinical use of power Doppler (PD) as a new tool for transcranial vessel imaging. Power Doppler displays the integrated power of the Doppler signal instead of the Doppler frequency shift used in the conventional color flow Doppler (CFD) technique. Twenty-one patients were ...
St Jean P - - 1996
alpha 1-Antitrypsin (alpha 1-AT) deficiency may play a role in arterial aneurysmal disease by allowing increased proteolysis of arterial structural proteins. Alpha 1-AT levels are influenced by variation at the PI (protease inhibitor) locus. PI phenotypes were determined in 173 patients with abdominal aortic aneurysms (77 from Pittsburgh, 96 from ...
Bagshaw R J - - 1996
Current predominant theories for the pathogenesis of intracranial saccular aneurysms have a congenital or a degenerative basis. Complementing these theories, the predilection of intracranial aneurysms for the human species has been attributed to a variety of human neurovascular morphological traits, which however, on closer scrutiny are not unique to the ...
Irikura K - - 1996
This study concerns 19 patients over 16 years of age with Moyamoya disease. Ten cases of intracranial haemorrhage, as the initial haemorrhagic event in patients aged from 21 to 55 (haemorrhagic group) and 9 cases of ischaemic events in 18- to 53-year-old patients (ischaemic group) were included. All haemorrhages were ...
van Bruggen A C - - 1996
We present a further evaluation of an improved recording method for the acoustic detection of intracranial aneurysms (ADA). A sensor was applied to the patient's eyes. Two measures were derived to summarize the power spectral density function of the sound frequencies that were obtained from each patient: the power median ...
Griffiths P D - - 1996
The assessment of cervical and cranial carotid arteries for atherosclerotic disease is the second commonest referral for angiography in our neuroradiological department; in 1993 this accounted for approximately 17% of the total cases. This is due to the resurgence of interest in endarterectomy for severe carotid stenosis. Although the degree ...
Lan M Y - - 1995
Although the correlation between fibromuscular dysplasia (FMD) and intracranial aneurysm is well established, the combination of FMD with a giant aneurysm is rare. This paper reports a patient with extracranial FMD associated with a giant intracavernous aneurysm compromising the trigeminal and abducens nerve. A review of the literature uncovered only ...
De Caro R - - 1995
Segmental duplications of the basilar artery, previously reported exclusively as anatomical variations, owe their clinical interest to the possible association with aneurysms localized at the junctions of the fenestrated segments. The morphological characteristics of 5 cases of basilar artery segmental duplication without aneurysms, found at autopsy, are reported. In 3 ...
Schievink W I - - 1995
The familial occurrence of intracranial aneurysms has been well described. However, intracranial aneurysms are not rare and the great majority of reported families consist of only two affected members. Therefore, the familial aggregation of intracranial aneurysms could be fortuitous. The authors investigated the familial occurrence of aneurysmal subarachnoid hemorrhage (SAH) ...
Cullom M E - - 1995
Ten consecutive patients with acute relative pupillary sparing third nerve palsies were enrolled in a prospective study to determine the prevalence of intracranial aneurysm. All patients were imaged with either cerebral angiography or magnetic resonance angiography. None of the patients demonstrated an intracranial aneurysm. The prevalence of aneurysm in patients ...
Kurihara N - - 1995
OBJECTIVE: The purpose of this study was to evaluate large intracranial aneurysms by contrast-enhanced 3D MRI. MATERIALS AND METHODS: Eleven patients, nine women and two men, were examined. The aneurysms involved the internal carotid artery in seven patients, the middle cerebral artery in one, the basilar artery in two, and ...
Elowiz E H - - 1995
BACKGROUND: The treatment of bacterial intracranial aneurysms include long-term antibiotic therapy and surgical clipping or resection. Direct surgical approaches to these aneurysms are often complicated by their peripheral location. METHODS: We report the use of a computerized tomography (CT) localized stereotactic craniotomy for the excision of a ruptured peripheral bacterial ...
Harker G - - 1995
There is an apparent lack of randomised clinical trials demonstrating a therapeutic advantage for intra-arterial, versus systemic, cisplatin administration as cancer treatment. A spontaneous, head and neck epidermal squamous cell carcinoma in sheep was used to compare intra-arterial and equivalent dose intravenous cisplatin infusion. The objective response rate for intra-arterially ...
Ronkainen A - - 1995
FAMILIAL INTRACRANIAL ANEURYSMS (FIAs) were compared with nonfamilial aneurysms (non-FIAs); the study group from east Finland included 167 family members from 85 families with FIAs. In every family, there has been two or more proven cases of subarachnoid hemorrhages among first-degree family members. Two-hundred and fifteen FIAs were found. The ...
Obuchowski N A - - 1995
Although the technology exists for accurate noninvasive screening for intracranial aneurysms, the efficacy of screening depends on several key parameters of the natural history of aneurysms. Recent studies suggest that the prevalence of intracranial aneurysms may reach 20% in the subpopulation of patients with a family history of these lesions; ...
Yano H - - 1995
A 27-year-old male presented with intracranial hemorrhage due to rupture of an idiopathic dissecting aneurysm in the A4 segment of the left anterior cerebral artery (ACA). This is a very rare location. He was successfully treated by resection of the aneurysm without neurological deficits. Surgical intervention is recommended for patients ...
Bader G M - - 1995
Little has been written regarding the safety of electroconvulsive therapy (ECT) administered to patients with intracranial aneurysms. The literature is reviewed and we report two additional cases of ECT safely and effectively employed to treat depressed patients with intracranial aneurysms. We found no reported cases of aneurysm rupture associated with ...
Kudoh Y - - 1995
A 43-year-old female was admitted for a labile hypertension and depression. High levels of plasma and urinary noradrenaline strongly suggested a pheochromocytoma. However, clinical investigations revealed a normal adrenal gland and thoraco-abdominal region. Venous samples from multiple sites indicated and increase in noradrenaline in the left jugular vein. Using computed ...
Foreman N K - - 1995
A child was diagnosed in 1969 as having acute lymphoblastic leukaemia (ALL) and received chemotherapy. On bone marrow relapse in 1973, he was treated with cranial irradiation (20 Gy) in addition to chemotherapy. He continues in complete remission 19 years after his relapse. At age 25 years, he presented with ...
Bell B T - - 1995
The vascular anatomy of the ethmoidal area in six normal horses and two normal ponies was studied using vascular-corrosion casts. The major arterial supply to the ethmoidal area stems from an intracranial source. The internal and external ethmoidal arteries anastomose on the rostral intracranial surface of the cribriform plate to ...
Saitoh H - - 1995
PURPOSE: To assess the incidence of angiography-related rerupture of intracranial aneurysms and to analyze other risk factors of this complication. METHODS: Clinical data from 144 patients with acute subarachnoid hemorrhage from ruptured intracranial aneurysm were reviewed retrospectively. In all patients, angiography was done by the transaortic approach. RESULTS: The incidence ...
Aoki S - - 1995
PURPOSE: To investigate the relationship between intracranial arterial wall enhancement and atherosclerosis. MATERIALS AND METHODS: Intracranial vertebral arteries of 30 patients and carotid arteries of 62 patients were studied with spin-echo magnetic resonance imaging with contrast enhancement and spatial presaturation. Arterial wall enhancement was graded as follows: stage 1, no ...
Nakase H - - 1995
A new method for intracranial monitoring of brain electrical activity by means of an intra-arterial guide wire as electrode is described. We carried out intracranial electro-encephalography (EEG) using an insulated Seeker Lite-10 guide wire 18 times in 14 patients: ten times in 6 patients with cerebral arteriovenous malformation (AVM) before ...
Barrow D L - - 1995
Giant intradural aneurysms are associated with an extremely grave natural history, yet remain potentially curable. Those aneurysms located on the intracavernous segment of the internal carotid artery are associated with a more benign natural history but frequently present with intractable cranial neuropathy requiring intervention. Proper current management requires a multidisciplinary ...
Rinne J - - 1995
The management outcome of 302 patients with multiple intracranial aneurysms (MIA) from a series of 1314 patients with cerebral aneurysms was assessed using the Glasgow Outcome Scale 1 year after diagnosis and/or treatment. The outcome was significantly poorer for patients with MIA than for those with single intracranial aneurysms (SIA). ...
Larranaga J - - 1995
Autosomal dominant polycystic kidney disease (ADPKD) may be associated with a variety of cardiovascular complications, including intracranial saccular aneurysms. In ADPKD, intracranial saccular aneurysms tend to rupture more frequently and earlier than the sporadic variety with a tendency to cluster in families. In contrast, dissecting intracranial aneurysms are rarely associated ...
Nowak G - - 1995
Acute subdural haematoma (SDH) secondary to a ruptured intracranial aneurysm is a rare event. Out of a total of 292 patients with a verified aneurysm (period 1986-1992) in five cases SDH was the diagnosis on CT-evaluation. One patient was in such a bad condition that no treatment was indicated. The ...
Kuroiwa T - - 1994
A 27-year-old male presented with intracranial embolization due to accidental penetration of his neck by an iron fragment at work. Cerebral angiography revealed foreign body embolization of the left middle cerebral artery. The foreign body was successfully removed via craniotomy and arteriotomy. The extended period from onset to surgical treatment ...
Schechter D - - 1994
Dipyridamole-associated adverse neurological side effects have not been extensively described. We present two cases of dipyridamole-associated transient motor neurological events with no evidence of residual neurological deficits detected clinically or by head CT. The patients showed no evidence of significant extracranial (internal carotid) artery disease. We propose the presence of ...
Truwit C L - - 1994
Although much remains to be learned about the embryology of the intracranial vasculature, much of the developmental pathways of the intracranial vascular system are now apparent. Understanding these pathways offers the potential to appreciate the nature of such arterial anomalies as the azygos anterior cerebral artery and the trigeminal artery ...
Rinne J - - 1994
Multiple intracranial aneurysms (MIA) have been detected in up to one-third of patients with cerebral aneurysms. Three main external factors influence these figures as follows: the quality of angiographies, the quantity of vessels studied, and referral policy. In a 1-year prospective study, we determined the incidence of MIA in a ...
Massoud T F - - 1994
Experimental models of intracranial saccular aneurysms are a useful contribution to our basic understanding of these lesions. Currently, the commonest in use are those constructed surgically in laboratory animals. We review the numerous surgical techniques available since the 1950s, and the research applications and uses of experimental aneurysms. Further development ...
Hademenos G J - - 1994
Mathematical models of aneurysms are typically based on Laplace's law which defines a linear relation between the circumferential tension and the radius. However, since the aneurysm wall is viscoelastic, a nonlinear model was developed to characterize the development and rupture of intracranial spherical aneurysms within an arterial bifurcation and describes ...
Korogi Y - - 1994
PURPOSE: To assess the accuracy of three-dimensional, Fourier transform, time-of-flight magnetic resonance (MR) angiography in the identification of intracranial aneurysms. MATERIALS AND METHODS: MR angiograms of 126 patients (59 male and 67 female patients, aged 12-77 years) with various intracranial vascular lesions were evaluated. Seventy-eight aneurysms, including 60 less than ...
Schievink W I - - 1994
BACKGROUND AND PURPOSE: The familial occurrence of intracranial aneurysms suggests the presence of a genetically determined underlying arteriopathy. The pattern of inheritance in these families usually is not known. METHODS: A family with seven members with intracranial aneurysms is described and, from the literature before 1994, a total of 238 ...
Schwarze J J - - 1994
The natural history of intracranial arterial stenoses remains relatively unknown. To monitor the progression of these lesions over time, the authors reviewed transcranial Doppler (TCD) laboratory reports at five hospitals for patients with angiographically documented intracranial arterial stenoses along the internal carotid artery distribution, and at least two TCD studies ...
Wei K C - - 1994
A patient presented with late onset seizure due to sphenoid ridge meningioma excision, during a craniotomy. Nine years after craniotomy, sphenoid ridge meningioma recurred in this patient along with middle cerebral artery (MCA) aneurysm. Peripheral intracranial aneurysm has been shown to be caused by many etiologies. But a direct relationship ...
Shaaf M - - 1994
The production of a bruit associated with intracranial aneurysms is very rare. A patient with a bilobed aneurysm of the middle cerebral artery who was otherwise asymptomatic was admitted with both a subjective and an objective bruit. The bruit resolved with elective clipping of the aneurysm. After a thorough review ...
Ronkainen A - - 1994
The population in eastern Finland has been stable for generations, causing a high degree of genetic isolation and providing excellent possibilities for follow-up studies. Of 91 families with familial intracranial aneurysms, 21 were randomly selected for prospective magnetic resonance angiography studies for intracranial aneurysms. Sixteen intracranial aneurysms were detected in ...
Atlas S W - - 1994
PURPOSE: To compare a new method for postprocessing data, soft thresholding and depth cueing of unrestricted techniques (STANDOUT), with maximum intensity projection (MIP) for magnetic resonance (MR) angiograms of intracranial aneurysms. MATERIALS AND METHODS: Eighteen patients with 19 intracranial aneurysms were studied. Images generated with STANDOUT were compared with those ...
Guglielmi G - - 1994
It is estimated that approximately 2% of the entire population harbors an intracranial aneurysm; most of these patients, however, will never become symptomatic. The incidence of aneurysmal rupture as a cause of subarachnoid hemorrhage is 10 per 100,000 per year. The primary purpose of treatment for ruptured aneurysms is to ...
Higashida R T - - 1994
Treatment of patients with an intracranial aneurysm by interventional neurovascular techniques has made tremendous advances over the past decade. Innovative occlusion devices have included detachable latex and silicone balloons, liquid polymers, intravascular lasers, and stents. As this technology continues to evolve, treatment options will expand and morbidity will continue to ...
Giller C A - - 1994
Although the shapes of velocity waveforms obtained with transcranial Doppler examination can indicate such abnormalities as increased intracranial pressure and proximal arterial compromise, the significance of unusual waveform morphologies is often obscure. In this report, we describe four cases in which an unusual waveform morphology was obtained from vessels distorted ...
Massoud T F - - 1994
We report our preliminary experience in the surgical construction of five experimental bifurcation and terminal aneurysm models in swine. We used unilateral neck vessels to construct models in which the relative directions and sizes of the parent and daughter arteries could be varied by surgery, resulting in aneurysms with high ...
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