Search Results
Results 601 - 650 of 1312
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Hattori T - - 1999
A 62-year-old male presented with a dural arteriovenous malformation located in anterior cranial fossa manifesting as acute right frontal intracerebral and subdural hematomas. Cerebral angiography showed only mass sign, but surgical exploration disclosed the dural arteriovenous malformation in the anterior cranial fossa. Anterior cranial fossa dural arteriovenous malformation should be ...
Malek A M - - 1999
OBJECTIVE AND IMPORTANCE: A case of a spinal dural arteriovenous fistula (DAVF) with two associated feeding artery aneurysms is reported. Intradural spinal arteriovenous malformations have been associated with aneurysms that present with subarachnoid hemorrhage and with venous varices that produce mass effect, but spinal DAVFs have not previously been described ...
Deasy N P - - 1999
Tentorial arteriovenous dural fistulae are uncommon. They are aggressive lesions: of all intracranial dural fistulae they are the most likely to present with haemorrhage. Treatment options include surgical excision or interruption of leptomeningeal draining veins and arterial embolisation in isolation or in combination with surgery. There has been one case ...
Pile-Spellman J - - 1999
Extremely high flow through arteriovenous malformations (AVMs) may limit the safety and effectiveness of endovascular glue therapy. To achieve a more controlled deposition of glue, we used transient but profound systemic hypotension afforded by an intravenously administered bolus of adenosine to induce rapidly reversible high-degree atrioventricular block. A patient with ...
Bain D J - - 1999
A 48-year-old woman presented to the respiratory clinic with progressive exertional dyspnoea and an abnormal chest radiograph. Examination revealed mucosal telangiectasia and pulmonary angiography confirmed the presence of two pulmonary arterial venous malformations (PAVM). After therapeutic coil embolisation, dyspnoea was markedly improved, and exercise tolerance increased. Comparison of exercise test ...
Konan A V - - 1999
OBJECTIVE AND IMPORTANCE: To illustrate that decompression of the facial nerve by transvenous endovascular treatment may relieve hemifacial spasm (HFS) caused by dilated veins. CLINICAL PRESENTATION: A 35-year-old man suffered severe chronic right HFS associated with a dilated right lateral mesencephalic vein lying in the vicinity of the facial nerve. ...
Kurita H - - 1999
We present a patient with a rare cerebrovascular malformation consisting of a typical arteriovenous malformation (AVM) with a nidus and a venous malformation (VM) in a single lesion. The AVM component was successfully obliterated by radiosurgery, whereas the VM was completely preserved. Radiosurgery can be an effective treatment technique for ...
Coulter T D - - 1999
Posttraumatic arteriovenous fistulas can form between vessels of the thorax that have sustained loss of integrity to the vessel wall. Although most are caused by injuries as a consequence of missile penetration or stab wounds, iatrogenic damage is a potential cause. Herein we present a case of a systemic arteriovenous ...
Ishikawa T - - 1999
The case of a patient with arteriovenous malformation (AVM) with a venous varix that occurred at the medulla oblongata is reported. The AVM bled twice in a short period. The AVM was fed by the small ramus, possibly the anterior spinal artery, originating from the right distal vertebral artery and ...
Kubota Y - - 1999
BACKGROUND: Endovascular therapy for dural arteriovenous fistulas (DAVFs) is not without any risks, although it has been generally accepted to be a safe procedure. In this paper, we report a very rare complication: metachronous DAVF around a jugular valve 4 months after transvenous embolization. CASE DESCRIPTION: A 43-year-old woman presented ...
Murai Y - - 1999
A 27-year-old male presented with a rare association of a ruptured orbitofrontal artery aneurysm and a dural arteriovenous malformation (DAVM) fed by both ethmoidal arteries, manifestation as severe headache, nausea, and vomiting. Computed tomography revealed a hematoma within the right frontal lobe and diffuse subarachnoid hemorrhage. The aneurysm was clipped ...
Huh J - - 1999
The case of a cyanotic infant with a rare combination of atypical pulmonary artery sling, imperforate anus, absence of the left kidney, interruption of the inferior vena cava, left side hemihypertrophy and diffuse-type pulmonary arteriovenous fistula is described. The clinical features were confusing, because of compounding abnormalities involving the respiratory ...
De Jesús O - - 1999
BACKGROUND: Tentorial dural arteriovenous fistulas (AVFs) are uncommon lesions usually treated surgically using a subtemporal exposure with division of the tentorium. This exposure requires significant retraction of the temporal lobe and has the possibility of significant arterialized venous bleeding if a draining vein is accidentally cut during division of the ...
Detweiler P W - - 1999
Spinal cord arteriovenous malformations encompass a variety of distinct lesions with aberrant connections between the arterial and venous circulation. Symptomatology and clinical presentation of such lesions are directly related to their location and particular pathophysiology. In the authors' surgical experience, 90% of patients have had the same or improved neurologic ...
Uggowitzer M M - - 1999
BACKGROUND AND PURPOSE: The purpose of our study was to examine the clinical value of echo-enhanced transcranial power Doppler sonography (EE-TCD), including it ability to assess hemodynamic parameters of the intracranial vasculature, in patients with suspected cerebral arteriovenous malformations (AVMs) and to compare this method with angiography. METHODS: Sixteen patients ...
Zoarski G H - - 1999
A woman reported painful thrombosis of the superficial femoral artery 16 months after a transfemoral microcatheter was glued into a cerebral arteriovenous malformation and transected at the groin. When the catheter was removed, a portion was found to be incorporated into the wall of the carotid artery. This case demonstrates ...
Wechsler J - - 1999
We present a case of pulmonary arteriovenous malformation (PAVM) in central localisation (type IIIa) of the upper lobe of the left lung. We discuss diagnostic (Doppler ultrasonography, CT, MRI, angiography) and therapeutic (embolization therapy) options and a current role of surgery in this uncommon clinical condition. Our patient underwent left ...
Grote E H - - 1999
With superselective angiography and careful clinical evaluation, dural fistulas were found to be the most important and most frequent origin of spinal arteriovenous malformations. Diagnosis may not be made for months or years, however, because dural fistulas never bleed and clinical deterioration is slow. Therapy with interventional techniques or microsurgery ...
Niimi Y - - 1999
Endovascular treatment is considered as the first choice of treatment for most cases of spinal vascular malformations. Clinical presentation, natural history, and origin of symptoms are briefly described on spinal cord arteriovenous malformations, spinal dural arteriovenous fistulas, epidural fistulas, and paraspinal fistulas. Pretherapeutic evaluation, materials and technique for embolization, post-therapeutic ...
Krishnamoorthy L - - 1998
Most arteriovenous malformations usually arise from pre-existing named vessels. We report an unusual variant of an arteriovenous malformation. An 18-year-old man presented with a painful swelling of the right forearm. Arteriograms suggested branches of the anterior interosseous artery were feeding the malformation. Operative findings however, revealed the presence of a ...
Nakashima T - - 1998
The authors report two rare cases of arteriovenous malformation (AVM) associated with moyamoya disease. An AVM, supplied by transdural communicating arteries, was located in the right occipital lobe in one patient who presented with ischemia. The second AVM, which was supplied by basal moyamoya vessels, was located in the posterior ...
Kinouchi H - - 1998
OBJECT: A retrospective analysis was conducted of 10 patients (three women and seven men) who were treated for spinal dural arteriovenous shunts (AVSs) located at the craniocervical junction. This analysis was performed to evaluate the characteristics of this unusual location in contrast with those of the more common thoracic and ...
Murayama Y - - 1998
OBJECTIVE: To assess acute and chronic histopathological changes observed in a swine arteriovenous malformation model after endovascular delivery of Embolyx E (Micro Therapeutics Inc., San Clemente, CA) and its organic solvent dimethyl sulfoxide (DMSO). To develop standard endovascular delivery techniques of Embolyx through microcatheters into swine rete mirabile (RMB). METHODS: ...
Uchino A - - 1998
We treated a 73-year-old man with a dural arteriovenous fistula (AVF) with cortical venous drainage of the left mastoid region using transarterial embolization of the middle meningeal and occipital arteries with n-butyl 2-cyanoacrylate (NBCA). The patient's clinical symptoms improved dramatically. Three months after the procedure, follow-up CT showed resolution of ...
Berry S A - - 1998
Patients with Klippel-Trenaunay (KT) syndrome have a complex constellation of anomalies that includes cutaneous capillary malformation (usually on an affected limb), abnormal development of the deep and superficial veins, and limb asymmetry, usually enlargement. Mixed vascular malformations may be present and include capillary, venous, arterial, and lymphatic systems. The records ...
Velioglu SK - - 1998
Patients with pulmonary arteriovenous fistulas (PAVFs) are at risk for the development of brain abscesses. The history of a 26-year-old man with PAVF, which has remained unrecognized for many years, is reported. Within four years, the patient presented life threatening cerebral abscesses twice at different sites. Treatment consisted of parenteral ...
Abbruzzese T A - - 1998
BACKGROUND: We administered a specific, nonselective matrix metalloproteinase (MMP) inhibitor (RS-113,456) to examine the effect of MMP inhibition on flow-mediated arterial enlargement in a rodent arteriovenous fistula (AVF) model. METHODS: Four groups of male Sprague-Dawley rats were created: sham (sham operated; n = 10), control (2.0 mm left common femoral ...
Nussbaum E S - - 1998
OBJECTIVE AND IMPORTANCE: Developmental venous anomalies (DVAs) are common anomalies of intracranial venous drainage that may occur in conjunction with other cerebral vascular malformations. The present case raises important questions regarding the association between anomalous venous drainage patterns and the development of arteriovenous malformations (AVMs). CLINICAL PRESENTATION: We present the ...
Matsuura J H - - 1998
BACKGROUND: Both transposed basilic vein (BV) and polytetrafluorethylene (PTFE) upper arm arteriovenous fistulas (AVF) are common angioaccess operations. To evaluate the patency and complication rates after AVF, a concurrent series of patients was reviewed. METHODS: Ninety-eight patients underwent brachial artery to axillary vein AVF: 30 BV and 68 PTFE. The ...
Hage J J - - 1998
A distal arteriovenous fistula was created secondarily in an innervated radial forearm free flap, to salvage the neophallus in three female-to-male transsexuals. This resulted in permanent edema and an arterial thrill in the neophallus. The arteriovenous fistulas were closed after 6 weeks to 20 months. Acute endothelial damage with risk ...
Marianeschi S M - - 1998
BACKGROUND: Pulmonary arteriovenous malformations can occur in a variety of clinical situations, including liver disease, systemic disorders, or after palliation of congenital heart disease, with serious clinical consequences. METHODS: We reviewed the potential mechanisms of this condition, diagnostic tools, and clinical management. RESULTS: Contrast echocardiography is an important diagnostic modality, ...
Riccabona M - - 1998
Our objective was to assess the prevalence and history of arteriovenous fistula after renal biopsy in pediatric patients by the use of color Doppler sonography. Fifty patients, aged 6 days to 18.5 years, underwent sonographically guided renal biopsy. Color Doppler sonography was performed prior to, during, and after the procedure. ...
Gurevitch Y - - 1998
Hereditary hemorrhagic telangiectasia (Osler-Weber-Rendu) disease is characterized by cutaneous, mucosal, and visceral vascular anomalies. Two patients were previously described with coronary artery aneurysms (ectasia) associated with this disease. This report describes a patient with Osler-Weber-Rendu disease in whom multiple coronary arteriovenous malformations were identified during coronary angiography. The patient presented ...
Djurberg H G - - 1998
During arterial catherisation of a cerebral arteriovenous malformation it may be difficult or impossible to access the nidus of the malformation through its small, tortuous feeding vessels due to microcatheter impaction. Carbon dioxide, a most potent cerebral vasodilator, was temporarily added to the inspired gases of two anaesthetised patients undergoing ...
Bürger T - - 1998
Postoperative iliac and popliteal arteriovenous fistulas are extremely rare. This article describes the percutaneous endovascular treatment of iatrogenically induced arteriovenous fistula in two patients with simultaneous use of intravascular ultrasound. In a 61-year-old woman, a fistula between popliteal artery and vein, inadvertently created during implantation of a prosthetic knee joint, ...
Dubois J - - 1998
OBJECTIVE: We describe the sonographic appearance and vascularization of hemangiomas and determine if vessel density and peak systolic Doppler shifts distinguish hemangiomas from other superficial soft-tissue masses. SUBJECTS AND METHODS: Our pilot study included 20 infants and children with hemangiomas who were to undergo biopsy before treatment with interferon alpha-2b. ...
Komiyama M - - 1998
A 63-year-old male presented with an embolic stroke in the right medial inferior cerebellum. Angiography at 2 and 8 months after the stroke revealed arteriovenous shunts from the vermian branch of the right posterior inferior cerebellar artery of the right inferior vermian vein. The shunts mimicked the arteriovenous shunts of ...
Cockroft K M - - 1998
Patients with arteriovenous malformation (AVM)-associated aneurysms are a well-recognized subset of the cerebrovascular disease population. The origin of these dual lesions is likely multifactorial, with hemodynamic stresses having a dominant influence. In most patients who present with hemorrhage, the aneurysm is the usual source. Since aneurysm rupture continues to carry ...
Kawata H - - 1998
Hepatic venous blood has been thought to play some role as a vasoactive agent in the development of pulmonary arteriovenous fistulas in patients with congenital heart disease. During the last 15 years, we have observed pulmonary arteriovenous fistulas in 3, and systemic arteriovenous fistulas in 2, patients from our 16 ...
Kai Y - - 1998
Summary: We report a patient who had dural arteriovenous fistulae in the region of the foramen magnum with repeated subarachnoid haemorrhage. Magnetic resonance imaging revealed abnormal vascular structures on the right side of the medulla oblongata in an extra-axial portion. Angiographic findings showed that the lesion was supplied from the ...
Saxena P R - - 1998
Many acutely acting antimigraine drugs have the ability to constrict porcine arteriovenous anastomoses as well as the human isolated coronary artery. These two experimental models seem to serve as indicators, respectively, for the therapeutic and coronary side-effect potential of the compounds. Using these two models, we have investigated the effects ...
Figueroa J M - - 1998
An immunohistochemical study of the nasal mucosa was done in pediatric patients attending an otorhinolaringology (ORL) clinic. The goal was a comparison between vascular innervation in patients with or without symptoms of chronic rhinitis. All patients had an indication for tonsillectomy prior to their inclusion in this study. Samples were ...
Coley S C - - 1998
Pulmonary arteriovenous malformations (PAVMs) are uncommon lesions, but are the cause of considerable morbidity and occasional mortality. They most commonly occur in association with hereditary haemorrhagic telangectasia and screening of families with this condition is therefore important. Embolization of PAVMs by coils is a well tolerated effective procedure with a ...
Kiratli Hayyam - - 1998
A 54-year-old woman had a gradually growing subcutaneous mass for more than three decades over her right zygomatic bone and below the right inferior orbital rim. The tumor was slightly pulsatile and non-tender. MRI scans demonstrated an unusually vascularized soft tissue mass with many large-caliber vessels. Selective angiography showed the ...
Malek A M - - 1998
Dural arteriovenous fistulas (DAVFs) are abnormal vascular connections located within the dura mater which are thought to be promoted by venous hypertension and venous sinus thrombosis. The symptoms associated with DAVFs depend on the direction and adequacy of venous drainage pathways, the amount of arteriovenous shunting and specific location of ...
Luo C B - - 1998
BACKGROUND: External carotid arteriovenous fistulas (AVFs) are rare and most hospitals have limited experience with their management. This study was designed to evaluate the effectiveness and safety of endovascular embolization of AVFs of the external carotid artery under angiographic control. METHODS: A series of 13 patients with AVFs involving the ...
Rosenblatt S - - 1998
This article describes the combined interventional and surgical treatment of arteriovenous malformations. The development of embolization as an adjunct to microsurgical resection of arteriovenous malformations has expanded the therapeutic armamentarium in the treatment of these lesions. Patient selection, indications, technical aspects as well as avoidance and treatment of complications with ...
Butterworth P C - - 1998
BACKGROUND: Patients who need long-term haemodialysis often require multiple operations to maintain their vascular access. The options for secondary or tertiary access procedures may become increasingly limited. Prosthetic conduits are commonly used in difficult cases but are associated with a high incidence of complications. METHODS: The brachial artery-transposed basilic vein ...
Levy R A - - 1998
Two methods of contrast-enhanced dynamic 3-D MR angiography of the head and neck are demonstrated. In the first, arterial and arteriovenous phases are temporally resolved by timing contrast injection such that maximum arteriovenous signal intensity difference is matched to acquisition of central k-space. A second, faster sequence allows for temporal ...
Kurosu A - - 1998
We describe a patient with unilateral proptosis and chemosis resulting from a dural arteriovenous malformation (AVM) of the superior sagittal sinus (SSS) fed mainly by branches of both external carotid arteries. The symptoms may have been caused by increased SSS pressure and disturbance of venous flow by the dural AVM.
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