Multiplicity of dural arteriovenous fistulas

2002 ◽  
Vol 96 (1) ◽  
pp. 76-78 ◽  
Author(s):  
J. Marc C. Van Dijk ◽  
Karel G. TerBrugge ◽  
Robert A. Willinsky ◽  
M. Christopher Wallace
Keyword(s):  
Venous Drainage ◽  
Entire Group ◽  
Additional Risk ◽  
Content Type ◽  
Arteriovenous Fistulas ◽  
Bilateral Involvement ◽  
Dural Arteriovenous Fistulas ◽  
Cortical Venous Drainage ◽  
Risk Of Hemorrhage ◽  
Fine Print

Object. Dural arteriovenous fistulas (AVFs) are a well-known pathoanatomical and clinical entity. Excluding bilateral involvement of the cavernous sinus, multiple dural AVFs are rare, with isolated reports in the literature. The additional risk associated with multiplicity is unknown, although it has been claimed that there is a greater risk of hemorrhage at presentation. In a group of 284 patients with dural AVFs consecutively treated at a single center, the occurrence of multiplicity is investigated and its risk factors for hemorrhage are identified. Methods. Among the 284 patients with both cranial and spinal dural AVFs, 20 patients with multiple fistulas were found. Nineteen (8.1%) of 235 patients with cranial AVFs had multiple cranial fistulas, and one (2%) of 49 patients with spinal AVFs harbored two spinal fistulas. Twelve patients were found to have a lesion at two separate sites, seven patients had them at three locations, and one patient had four fistulas, each at a different site. In the subgroup with multiple AVFs the percentage of hemorrhage at presentation was three times higher than in the entire group (p = 0.01). Cortical venous drainage in cranial fistulas was present in 84% of patients with multiple lesions compared with 46% of patients with solitary lesions (p < 0.005). Conclusions. Multiple dural AVFs are not rare. In this group of 284 patients it was found in 8.1% of all patients with cranial dural AVFs. Multiplicity was associated with a higher percentage of cortical venous drainage, a pattern of drainage reportedly yielding a higher risk for hemorrhage.

Combining endovascular and neurosurgical treatments of high-risk dural arteriovenous fistulas in the lateral sinus and the confluence of the sinuses

1999 ◽  
Vol 90 (2) ◽  
pp. 289-299 ◽  
Author(s):  
Katsuya Goto ◽  
Prijo Sidipratomo ◽  
Noboru Ogata ◽  
Toru Inoue ◽  
Haruo Matsuno
Keyword(s):  
High Risk ◽  
Signs And Symptoms ◽  
Venous Drainage ◽  
Complex Nature ◽  
Lateral Sinus ◽  
Content Type ◽  
Arteriovenous Fistulas ◽  
Dural Arteriovenous Fistulas ◽  
Diffuse Brain Swelling ◽  
Fine Print

Object. The authors describe the use of a systemic approach to treat dural arteriovenous fistulas (DAVFs) in the lateral sinus and the confluence of sinuses in 17 patients who presented with signs and symptoms related to intracranial hemorrhage, infarction, and diffuse brain swelling.Methods. Angiographic examination revealed three different types of DAVFs in these high-risk patients: 1) extremely high flow DAVF not associated with sinus occlusion or leptomeningeal retrograde venous drainage (LRVD); 2) localized DAVF with exclusive LRVD and without sinus occlusion; and 3) diffuse DAVF with sinus occlusion and LRVD. Because of the complex nature of these lesions, the authors adopted a staged protocol in which they combined endovascular and surgical treatments.Conclusions. The authors believe that by close collaboration between endovascular therapists and vascular neurosurgeons, high-risk DAVFs in the lateral sinus and the confluence of sinuses can be successfully managed without treatment-related morbidity and mortality.

Benign cranial dural arteriovenous fistulas: outcome of conservative management based on the natural history of the lesion

2002 ◽  
Vol 97 (4) ◽  
pp. 767-770 ◽  
Author(s):  
Junichiro Satomi ◽  
J. MARC C. van Dijk ◽  
Karel G. Terbrugge ◽  
Robert A. Willinsky ◽  
M. Christopher Wallace
Keyword(s):  
Conservative Management ◽  
Venous Drainage ◽  
Initial Assessment ◽  
Benign Condition ◽  
Content Type ◽  
Arteriovenous Fistulas ◽  
Dural Arteriovenous Fistulas ◽  
Tolerable Level ◽  
Fine Print

Object. Cranial dural arteriovenous fistulas (DAVFs) can be classified into benign or aggressive, based on their patterns of venous drainage. A benign condition requires the absence of cortical venous drainage (CVD). The clinical and angiographic features of a consecutive single-center group of 117 patients harboring benign cranial DAVFs were evaluated over time to validate the behavior and appropriate management of these lesions. Methods. At the initial assessment four patients were asymptomatic. Two infants presented with congestive heart failure. All other patients presented with other benign symptoms: chronic headache, bruit, or orbital phenomena. Observational management was instituted in 73 patients (62%). Intolerable bruit or ophthalmological sequelae were deemed indications for palliative embolization in 43 patients and surgical treatment in one patient. A median follow-up period of 27.9 months (range 1 month—17.5 years) was available in 112 patients (95.7%), among whom repeated angiography was performed in 50. Overall, observational and palliative management resulted in a benign and tolerable level of disease in 110 (98.2%) of 112 cases. In two cases managed conservatively CVD developed. In both of these cases the conversion from benign to aggressive DAVF was associated with spontaneous progressive thrombosis of venous outlets. Conclusions. The disease course of a cranial DAVF without CVD is indeed benign, obviating the need for a cure of these lesions. Symptoms are well tolerated with either observation or palliative treatment. After a long-term follow-up review of 68 patients, this conservative management resulted in a benign and tolerable level of disease in 98.5% of cases. It is noteworthy, however, that a benign DAVF carries a 2% risk of developing CVD, mandating close clinical follow-up review in such cases and renewed radiological evaluation in response to any deterioration in the patient's condition.

Direct packing of the isolated sinus in patients with dural arteriovenous fistulas of the transverse—sigmoid sinus

1998 ◽  
Vol 88 (3) ◽  
pp. 449-456 ◽  
Author(s):  
Shunro Endo ◽  
Naoya Kuwayama ◽  
Akira Takaku ◽  
Michiharu Nishijima
Keyword(s):  
Transarterial Embolization ◽  
Blood Gases ◽  
Venous Drainage ◽  
Sigmoid Sinus ◽  
Blood Gas ◽  
Content Type ◽  
Arteriovenous Fistulas ◽  
Dural Arteriovenous Fistulas ◽  
Sinus Pressure ◽  
Fine Print

Object. The goal of this study was to evaluate the efficacy of direct packing of the isolated sinus (occluded both distally and proximally) in patients with dural arteriovenous fistulas (AVFs) of the transverse—sigmoid sinus. Methods. Eight patients were included in this study. There were seven men and one woman, ranging in age from 47 to 75 years (mean 60.4 years). Five patients presented with intracranial hemorrhage or venous infarction, one with convulsions, and two with pulsatile tinnitus. Prominent retrograde cortical venous drainage due to sinus isolation was angiographically demonstrated in all patients. All patients were treated by a small craniotomy and direct sinus packing with microcoils; the procedure was performed with the aid of digital subtraction angiography. Five patients were pretreated with transarterial embolization to reduce arterial inflow before the procedure, and intrasinus pressure and sinus blood gases were monitored throughout the operation. Postsurgery, the dural AVF was completely obliterated in all patients. The sinus pressure was 29 to 58% of systemic blood pressure, and sinus blood gas levels were purely arterial before packing. There was no morbidity related to direct sinus packing; however, one patient died as a result of acute myocardial infarction. Over a follow-up period ranging from 1 to 5 years, a faint asymptomatic dural AVF recurred in one patient on the cortex adjacent to the occluded sinus but regressed spontaneously within 1 year. Conclusions. Direct sinus packing was found to be highly effective for the treatment of dural AVFs that empty into the isolated sinus. Measurement of changes in sinus pressure and sinus blood gas levels was useful for monitoring the progress of direct sinus packing.

The role of radiosurgery and particulate embolization in the treatment of dural arteriovenous fistulas

1996 ◽  
Vol 84 (5) ◽  
pp. 804-809 ◽  
Author(s):  
Michael J. Link ◽  
Robert J. Coffey ◽  
Douglas A. Nichols ◽  
Deborah A. Gorman
Keyword(s):  
Latency Period ◽  
Venous Drainage ◽  
External Carotid Artery ◽  
External Carotid ◽  
Content Type ◽  
Arteriovenous Fistulas ◽  
Ocular Symptoms ◽  
Dural Arteriovenous Fistulas ◽  
Feeding Vessels ◽  
Cortical Venous Drainage

✓ Over the past 5 years 29 patients with dural arteriovenous fistulas (AVFs) were treated by the authors using the Leksell radiosurgical gamma knife unit. Within 2 days after radiosurgery, 17 patients with AVFs that exhibited retrograde pial or cortical venous drainage (12 patients) and/or produced intractable bruit (eight patients) underwent particulate embolization of external carotid feeding vessels. The rationale for this treatment strategy was that radiosurgery was expected to cause obliteration of most fistulas after 12 to 36 months. In patients with bruit, ocular symptoms, or in those at risk for hemorrhage, treatment with embolization after radiosurgery kept the fistulas angiographically visible for radiosurgical targeting yet offered palliation of symptoms and temporary, partial protection from hemorrhage during the latency period. In 12 patients, preobliteration embolization immediately reduced (10 patients) or eliminated (two patients) retrograde pial venous drainage. To date, no lesion has hemorrhaged after treatment. Angiography 1 to 3 years posttreatment in 18 patients showed total obliteration of 13 fistulas (72%) and partial obliteration of five (28%). Radiosurgery, followed by embolization when retrograde pial venous drainage, intractable bruit, and/or major external carotid artery supply is present, appears to be a promising treatment for selected patients with symptomatic dural AVFs.

Early rebleeding from intracranial dural arteriovenous fistulas: report of 20 cases and review of the literature

1999 ◽  
Vol 90 (1) ◽  
pp. 78-84 ◽  
Author(s):  
Hugues Duffau ◽  
Manuel Lopes ◽  
Vesna Janosevic ◽  
Jean-Pierre Sichez ◽  
Thierry Faillot ◽  
...  
Keyword(s):  
Neurological Deficit ◽  
Venous Drainage ◽  
Neurological Status ◽  
Content Type ◽  
Arteriovenous Fistulas ◽  
Presenting Symptoms ◽  
Type Iv ◽  
Cortical Venous Drainage ◽  
Acute Headache ◽  
Fine Print

Object. In this study the authors sought to estimate the frequency, seriousness, and delay of rebleeding in a homogeneous series of 20 patients whom they treated between May 1987 and May 1997 for arteriovenous fistulas (AVFs) that were revealed by intracranial hemorrhage (ICH). The natural history of intracranial dural AVFs remains obscure. In many studies attempts have been made to evaluate the risk of spontaneous hemorrhage, especially as a function of the pattern of venous drainage: a higher occurrence of bleeding was reported in AVFs with retrograde cortical venous drainage, with an overall estimated rate of 1.8% per year in the largest series in the literature. However, very few studies have been designed to establish the risk of rebleeding, an omission that the authors seek to remedy.Methods. Presenting symptoms in the 20 patients (17 men and three women, mean age 54 years) were acute headache in 12 patients (60%), acute neurological deficit in eight (40%), loss of consciousness in five (25%), and generalized seizures in one (5%). Results of the clinical examination were normal in five patients and demonstrated a neurological deficit in 12 and coma in three. Computerized tomography scanning revealed intracranial bleeding in all cases (15 intraparenchymal hematomas, three subarachnoid hemorrhages, and two subdural hematomas). A diagnosis of AVF was made with the aid of angiographic studies in 19 patients, whereas it was a perioperative discovery in the remaining patient. There were 12 Type III and eight Type IV AVFs according to the revised classification of Djindjian and Merland, which meant that all AVFs in this study had retrograde cortical venous drainage. The mean duration between the first hemorrhage and treatment was 20 days. Seven patients (35%) presented with acute worsening during this delay due to radiologically proven early rebleeding. Treatment consisted of surgery alone in 10 patients, combined embolization and surgery in eight, embolization only in one, and stereotactic radiosurgery in one. Three patients died, one worsened, and in 16 (80%) neurological status improved, with 15 of 16 AVFs totally occluded on repeated angiographic studies (median follow up 10 months).Conclusions. The authors found that AVFs with retrograde cortical venous drainage present a high risk of early rebleeding (35% within 2 weeks after the first hemorrhage), with graver consequences than the first hemorrhage. They therefore advocate complete and early treatment in all cases of AVF with cortical venous drainage revealed by an ICH.

Surgical interruption of intradural draining vein as curative treatment of spinal dural arteriovenous fistulas

1995 ◽  
Vol 82 (2) ◽  
pp. 196-200 ◽  
Author(s):  
John K. B. Afshar ◽  
John L. Doppman ◽  
Edward H. Oldfield
Keyword(s):  
Arterial Occlusion ◽  
Venous Drainage ◽  
Curative Treatment ◽  
Content Type ◽  
Arteriovenous Fistulas ◽  
Dural Arteriovenous Fistulas ◽  
Flow Through ◽  
Spinal Dural Arteriovenous Fistulas ◽  
Fine Print

✓ To establish if interruption of the intradural draining spinal vein or surgical excision are curative treatments for spinal dural arteriovenous fistulas (AVFs), the medical records and radiographic studies of 19 patients with spinal dural AVFs and progressive myelopathy were reviewed. Spinal arteriograms were obtained before and within 2 weeks after surgery in 19 patients, and after a delay of 4 months or more in 11 patients. The mean clinical and arteriographic follow up was at 37 and 35 months, respectively. In the 11 patients who underwent excision of the dural AVF there was no evidence of a residual lesion upon immediate or delayed postoperative arteriography. Surgery in eight patients consisted of simple interruption of the intradural draining vein as it entered the subarachnoid space. In six of these patients the vein draining the AVF intrathecally provided the only venous drainage of the AVF. In these six patients there was no immediate (six of six) or delayed (four of six) arteriographic evidence of residual or recurrent flow through the AVF. Two patients had an AVF with both intra- and extradural venous drainage; after intradural division of the draining vein there was residual flow through the AVF into the extradural venous system. In one of these two patients intrathecal venous drainage was reestablished, which required additional therapy. In the other patient the extradural AVF spontaneously thrombosed and was not evident on delayed follow-up arteriography. In patients with spinal dural AVFs with only intrathecal medullary venous drainage, which includes most patients with these lesions, surgical interruption of the intradural draining vein provides lasting and curative treatment. In patients with both intra- and extradural drainage of the AVF, complete excision of the fistula or interruption of the intra- and extradural venous drainage of the fistula is indicated. In patients in whom a common vessel supplies the spinal cord and the dural AVF, simple surgical interruption of the vein draining the AVF is the treatment of choice, as it provides lasting obliteration of the fistula and it is the only treatment that does not risk arterial occlusion and cord infarction. Simple interruption of the venous drainage of a spinal dural AVF provides lasting occlusion of the fistula, as it does for cranial dural AVFs, if all pathways of venous drainage are interrupted. This result provides further evidence that the venous approach to the treatment of dural AVFs can be used successfully.

Use of a wedged microcatheter for curative transarterial embolization of complex intracranial dural arteriovenous fistulas: indications, endovascular technique, and outcome in 21 patients

2003 ◽  
Vol 98 (3) ◽  
pp. 498-506 ◽  
Author(s):  
Peter Kim Nelson ◽  
Stephen M. Russell ◽  
Henry H. Woo ◽  
Anthony J. G. Alastra ◽  
Danko V. Vidovich
Keyword(s):  
Transarterial Embolization ◽  
Visual Field Loss ◽  
Venous Drainage ◽  
Venous Access ◽  
Definitive Treatment ◽  
Content Type ◽  
Cavernous Sinus Syndrome ◽  
Arteriovenous Fistulas ◽  
Dural Arteriovenous Fistulas ◽  
Fine Print

Object. The aim of this study was to describe the application of a novel transarterial approach to curative embolization of complex intracranial dural arteriovenous fistulas (DAVFs). This technique is particularly useful in patients harboring high-grade DAVFs with direct cortical venous drainage or for whom transvenous coil embolization is not possible because of limited sinus venous access to the fistula site due to thrombosis or stenotic changes. Methods. Twenty-three DAVFs in 21 patients were treated using a transarterial N-butyl cyanoacrylate (NBCA) embolization technique with the aid of a wedged catheter. In all patients, definitive treatment involved two critical steps: 1) a microcatheter was wedged within a feeding artery, establishing flow-arrest conditions within the catheterized vessel distal to the microcatheter tip; and 2) NBCA was injected under these resultant flow-arrest conditions across the pathological arteriovenous connection and into the immediate draining venous apparatus, definitively occluding the fistula. Patient data were collected in a retrospective manner by reviewing office and inpatient charts and embolization reports, and by directly analyzing all procedural and diagnostic angiograms. Eight patients presented with the principal complaint of tinnitus/bruit, five with intracranial hemorrhage, four with cavernous sinus syndrome, and one each with seizures, ataxia, visual field loss, and hiccups. The parent (recipient) venous structure of the DAVFs in this study included 11 leptomeningeal veins, eight transverse/sigmoid sinuses, three cavernous sinuses, and one sphenoparietal sinus. The NBCA permeated the arteriovenous shunt, perifistulous network, and proximal draining vein in all DAVFs. Occlusion was confirmed on postembolization angiography studies. No complication occurred in any patient in this series. There has been no recurrence during a mean follow up of 18.7 months (range 2–46 months). Conclusions. Transarterial NBCA embolization with the aid of a wedged catheter in flow-arrest conditions is a safe and an effective treatment for intracranial DAVFs.

A variant of arteriovenous fistulas within the wall of dural sinuses. Results of combined surgical and endovascular therapy

1991 ◽  
Vol 74 (2) ◽  
pp. 199-204 ◽  
Author(s):  
Stanley L. Barnwell ◽  
Van V. Halbach ◽  
Christopher F. Dowd ◽  
Randall T. Higashida ◽  
Grant B. Hieshima ◽  
...  
Keyword(s):  
Venous Drainage ◽  
Venous Hypertension ◽  
Neurological Dysfunction ◽  
Dural Sinus ◽  
Unique Type ◽  
Content Type ◽  
Av Fistula ◽  
Arteriovenous Fistulas ◽  
Av Fistulas ◽  
Cortical Venous Drainage

✓ Dural arteriovenous (AV) fistulas are thought to be acquired lesions that form in an area of thrombosis within a sinus. If the sinus remains completely thrombosed, venous drainage from these lesions occurs through cortical veins, or, if the sinus is open, venous drainage is usually into the involved sinus. Among 105 patients with dural A V fistulas evaluated over the the past 5 years, seven had a unique type of dural AV fistula in the superior sagittal, transverse, or straight sinus in which only cortical venous drainage occurred despite a patent involved sinus; the fistula was located within the wall of a patent dural sinus, but outflow was not into the involved sinus. This variant of dural AV fistulas puts the patient at serious risk for hemorrhage or neurological dysfunction caused by venous hypertension. Three patients presented with hemorrhage, one with progressive neurological dysfunction, one with seizures, and two with bruit and headaches. A combination of surgical and endovascular techniques was used to close the fistula while preserving flow through the sinus.

Results of combined stereotactic radiosurgery and transarterial embolization for dural arteriovenous fistulas of the transverse and sigmoid sinuses

2001 ◽  
Vol 94 (6) ◽  
pp. 886-891 ◽  
Author(s):  
Jonathan A. Friedman ◽  
Bruce E. Pollock ◽  
Douglas A. Nichols ◽  
Deborah A. Gorman ◽  
Robert L. Foote ◽  
...  
Keyword(s):  
Stereotactic Radiosurgery ◽  
Transarterial Embolization ◽  
Symptom Relief ◽  
Related Complication ◽  
Content Type ◽  
Arteriovenous Fistulas ◽  
Dural Arteriovenous Fistulas ◽  
Lost To Follow Up ◽  
Fine Print

Object. Most dural arteriovenous fistulas (DAVFs) of the transverse and sigmoid sinuses do not have angiographically demonstrated features associated with intracranial hemorrhage and, therefore, may be treated nonsurgically. The authors report their experience using a staged combination of radiosurgery and transarterial embolization for treating DAVFs involving the transverse and sigmoid sinuses. Methods. Between 1991 and 1998, 25 patients with DAVFs of the transverse and/or sigmoid sinuses were treated using stereotactic radiosurgery; 22 of these patients also underwent transarterial embolization. Two patients were lost to follow-up review. Clinical data, angiographic findings, and follow-up records for the remaining 23 patients were collected prospectively. The mean duration of clinical follow up after radiosurgery was 50 months (range 20–99 months). The 18 women and five men included in this series had a mean age of 57 years (range 33–79 years). Twenty-two (96%) of 23 patients presented with pulsatile tinnitus as the primary symptom; two patients had experienced an earlier intracerebral hemorrhage (ICH). Cognard classifications of the DAVFs included the following: I in 12 patients (52%), IIa in seven patients (30%), and III in four patients (17%). After treatment, symptoms resolved (20 patients) or improved significantly (two patients) in 96% of patients. One patient was clinically unchanged. No patient sustained an ICH or irradiation-related complication during the follow-up period. Seventeen patients underwent follow-up angiographic studies at a mean of 21 months after radiosurgery (range 11–38 months). Total or near-total obliteration (> 90%) was seen in 11 patients (65%), and more than a 50% reduction in six patients (35%). Two patients experienced recurrent tinnitus and underwent repeated radiosurgery and embolization at 21 and 38 months, respectively, after the first procedure. Conclusions. A staged combination of radiosurgery and transarterial embolization provides excellent symptom relief and a good angiographically verified cure rate for patients harboring low-risk DAVFs of the transverse and sigmoid sinuses. This combined approach is a safe and effective treatment strategy for patients without angiographically determined risk factors for hemorrhage and for elderly patients with significant comorbidities.

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