A large percentage of patients with cerebral arteriovenous malformation (AVM) show focal neurological signs or a history of intracranial hemorrhage. The present study used transcranial Doppler sonography to assess the clinical significance of hemodynamic disturbances in the intracranial arteries of patients with an AVM. 12 patients with untreated AVMs were examined by clinical, angiography, CT Scanning, and with transcranial Doppler sonography (blood flow velocity measurement in main intracranial arteries). A pathological increase in blood flow velocity was frequently found in AVM feeding arteries. AVM size was a poor predictor of pathological transcranial Doppler results.
Echocardiography, Doppler ; Arteriovenous Malformations ; diagnosis

From 1/1991 to 5/1995, 43 arterio-venous malformations were operated on at the Dep of Neurosurgery of Viet Duc hospital- Ictus, neurological signs, disturbances of speech were the main presenting manifestations of this disease. CT Scanner angiogarphy and pathological examination were of paramount importance for the detection of this disease. Two procedures of treatment were utilised: surgical removal of the AVM and ventricular shunt. Post operative results were evaluted by repartition into 3 groups: - Good (clinical improvement): 95.3%. – Mean (with long lasting deficit): 2.35%.
Arteriovenous Malformations ; diagnosis ; surgery ; therapeutics

23 patients with diagnosed malformation of cerebral artery treated at Bach Mai Hospital from May 2000 to April 2002, were admitted because of complications of subarachnoid, or epileptic state, or of localized signs of nerves such as unilateral paralysis of III nerve. All patients were undergone basic examination such as angiography, uremia, glucemia, electroencelograme. 16/23 patients undergone CT scan, 19/23 encephalomyelo puncture, 100% encephaloarterigraphy and 16/23 operation. Internal therapy in acute stage is very important, contibuting to the results of an operation
Cerebral Arteries ; Arteriovenous Malformations ; Patients ; diagnosis ; Therapeutics

The authors report a case of angiographycally occult intracranial vascular malformation. The patient had huge calcified mass at left frontoparietal area. The preoperative diagnosis was a slowly growing benign tumor. The mass was very hard and so vascular malformation was not suspected even during the operation. Pathologic report revealed arteriovenous malformation.
Arteriovenous Malformations* ; Brain Neoplasms* ; Brain* ; Diagnosis ; Humans ; Vascular Malformations

The present case illustrates an arteriovenous malformation of the cheek in a 25-year-old male. The clinical presentation, radiographic findings, differential diagnosis, treatment and histopathologic description are presented. Diagnosis of the lesion was confirmed by angiography, and the lesion was treated by angiographically controlled vascular embolization followed by complete surgical excision.
Adult ; Angiography ; Arteriovenous Malformations* ; Cheek ; Diagnosis ; Diagnosis, Differential ; Humans ; Male

With Xenon gas inhalation method, the authors measured the rCBF from 14 AVM patients who were checked into the Neurosurgical Department of Kyung Hee Medical College. In nine of them, we detected the rCBF within 24 hours after operation ; in comparison with the clinical progress, we got the results as follows; 1) The amount of rCBF before operation was 62.9+/-12.7 in adjacent regions around the AVM, and 67.8+/-14.7 in the contralateral hemisphere. These values were lower than normal rCBF, undoubtedly demonstrating the development of cerebral steal phenomenon. 2) After total excision of AVM, the amount of rCBF was 77.5+/-20.7(11.6+/-21.5% increase) in adjacent regions around AVM, and 79.6+/-16.3(8.9+/-17.0% increase) in the contralateral hemisphere. As the cerebral steal phenomenon was disappeared, 80% of clinical symptoms and signs were restored, which showed the interrelation between the rCBF and clinical progress. 3) The measurement of rCBF by Xenon gas inhalation method does no harm to human body, and can be carried out with ease and safety. 4) It is thought that in the case if AVM patient, the measurement of rCBF by Xenon gas inhalation method is a good parameter for diagnosis and follow up of AVM's patients.
Arteriovenous Malformations* ; Diagnosis ; Hemodynamics* ; Human Body ; Humans ; Inhalation ; Xenon

Angiography is the gold standard for the diagnosis and complete resection of arteriovenous malformations (AVMs). The absence of residual AVM after surgery is commonly believed to reduce the risk of future hemorrhage. However, AVMs can recur after proven complete angiographic resection can occur, albeit rarely, especially in the pediatric population. We report a rare case of a recurrent AVM two years after complete resection in an adult patient. This case report shows that AVMs in adults can recur despite their rarity and despite postoperative angiography confirming complete removal. Moreover, in this case, the recurrent AVM involved a new feeding vessel that was not involved with the initial lesion.
Adult ; Angiography ; Arteriovenous Malformations* ; Diagnosis ; Hemorrhage ; Humans ; Palate* ; Recurrence

PURPOSE: To evaluate the role of rotational angiography in the diagnosis, characterization, and postoperativeassessment of aneurysm, and in the analysis of arteriovenous malformation(AVM). MATERIALS AND METHODS: Between May1995 and February 1997, 31 patients who had undergone DSA and rotational angiography were retrospectivelyevaluated. Rotational angiographic and lateral DSA images were compared by two radiologists, and in 22 patientswith aneurysmal clipping, location, visibility of the aneurysmal neck, vascular branch anatomy, and projection andshape of the aneurysm were evaluated. The presence or absence of residual aneurysmal neck was evaluated in eightpostoperative patients, and the anatomy of feeder artery and intranidal aneurysm were evaluated in five AVMpatients. RESULT: Twenty-seven aneurysms were found in 22 of 26 patients in whom DSA had indicated thispossibility. Rotational angiography was superior to conventional DSA in the assessment of neck(67%), vascularbranch anatomy(41%), and projection(22%), location(19%), and shape(15%) of the aneurysm. Rotational angiographyhelped confirm the absence of aneurysm at 11 sites, and was also superior to conventional DSA for confirming theabscence of residual neck in four of eight postoperative patients, and to evaluate feeder artery in four of fiveAVM patients. CONCLUSION: Rotational angiography is better than conventional DSA for the evaluation of aneurysmand AVM.
Aneurysm ; Angiography* ; Arteries ; Arteriovenous Malformations* ; Diagnosis ; Humans ; Intracranial Aneurysm* ; Neck

Clinicians must be able to recognize post-extraction complications and treat them in a timely manner; complications that may potentially be life-threatening require special attention. Although arteriovenous malformation (AVM) is a very rare disorder, it may induce life-threatening hemorrhage during surgical intervention in the pertinent site. The present article examines the diagnosis and treatment modalities of AVM based on the case of a patient who was diagnosed with AVM with continuous bleeding after tooth extraction and who was successfully treated.
Arteriovenous Malformations* ; Dental Care ; Diagnosis ; Hemorrhage* ; Humans ; Postoperative Hemorrhage ; Tooth Extraction* ; Tooth* ; Vascular Malformations

PURPOSE: Differential diagnosis between arteriovenous (AVMs) and non-arteriovenous malformations (nAVMs) is important in patients with congenital vascular malformations, because AVMs can cause hemodynamic alteration and require immediate treatment. We investigated whether transarterial lung perfusion scintigraphy (TLPS) was useful for the diagnosis and post-therapeutic evaluation of AVMs in extremities. MATERIALS AND METHODS: Fifty-seven patients (M:F=26:31, 21+/-13 yr, 9 upper and 48 lower extremities) suspected of congenital vascular malformations in extremities underwent TLPS using 99mTc-MAA before embolization/sclerotherapy. Dose-corrected shunt fraction (SF) was calculated from time-activity curve of the lung. Final diagnosis of AVMs was determined by angiography. In patients with AVMs, follow-up TLPS was done for post-therapeutic evaluation. RESULTS: Sixteen patients (8 upper and 8 lower extremities) had AVMs, while the remaining 41 had nAVMs (1 upper and 40 lower extremities). The mean SF of AVMs on TLPS was significantly higher than that of nAVMs (66.4+/-25.8% vs. 2.8+/-4.3%, p=0.003). The sensitivity, specificity, and accuracy of TLPS (cut-off of SF = 20.0%) in diagnosis of AVMs before treatment were 93.8% (15/16), 100% (41/41) and 98.2% (56/57), respectively. The follow-up TLPS and angiography for post-therapeutic evaluation showed concordant results in 13 of 16 patients (81.3%) with AVMs. The mean SF of TLPS was significantly decreased after embolization/sclerotherapy (69.5+/-24.0% vs. 41.0+/-34.7%, p=0.01). CONCLUSION: TLPS provides hemodynamic information of AVMs in extremities semiquantitatively. Furthermore, the results of TLPS showed a high concordance rate with angiographic findings. Therefore, TLPS is useful for the diagnosis and post-therapeutic evaluation of AVMs in extremities.
Angiography ; Arteriovenous Malformations* ; Diagnosis* ; Diagnosis, Differential ; Extremities* ; Follow-Up Studies ; Hemodynamics ; Humans ; Lung* ; Perfusion Imaging* ; Perfusion* ; Sensitivity and Specificity ; Vascular Malformations