[Arteriovenous lung fistula. Arteriovenous aneurysm of the lung, pulmonary arteriovenous fistula, cavernous hemangioma of the lung].
Explore the source record for details and available documents.
Age Factors↗
SEARCH · Search PubMed
Results for “ARTERIOVENOUS FISTULA”
Search indexed PubMed citations on genomics, clinical trials, systematic reviews and public health. Explore titles, authors and supplied subject terms, then open the PubMed record.
Quote a phrase for an exact phrase match. Source license links do not imply unrestricted reuse.
Investigations into the relationship between hemodynamics and vascular alterations in an established arteriovenous fistula.
Arteriovenous fistula are specific vessels created by a vascular operation in order to provide sufficient blood access for extracorporeal circulation in hemodialysis. They are subject to numerous pathologies that may be caused by hemodynamic effects. To better understand these effects, a specific patient's arteriovenous fistula was reconstructed from computed tomography angiography. Computational fluid dynamics software made it possible to solve fluid mechanics equations under physiological conditions. An accurate map of unsteady velocity profiles and wall shear stress was drawn up. The computed velocity profiles were successfully confronted with Echo Doppler investigation. Selected regions with or without calcification, the end stage of wall alteration, were examined in terms of the mechanical constraints generated by blood flow. In contrast with other authors, we did not observe any association between calcification and areas of oscillating shear stress. Nevertheless, a statistical analysis of the whole vessel envelop and specific sites of calcification suggested a potential association between calcification and high temporal wall shear stress gradients.
Angiography↗
Percutaneous transcatheter steel-coil embolization of a large proximal post-traumatic superior mesenteric arteriovenous fistula.
Arteriovenous fistulae affecting the proximal portions of the superior mesenteric vessels are extremely rare. We are reporting one such fistula which occurred in a young male as a sequel to a stab in the epigastrium. The arteriovenous fistula was successfully treated by percutaneous steel coil embolization.
Abdominal Injuries↗
Post-sternotomy internal mammary arteriovenous fistula.
Arteriovenous fistula from the mammary artery is a rare complication following cardiac surgery. The fistula usually develops within the first 2 weeks after surgery and is initially asymptomatic. Typically, a continuous machinery murmur is heard along the parasternal border of the chest wall. A patient with an arteriovenous fistula between the right internal mammary artery and mammary vein following a combined aortic valve and coronary bypass operation is described. A transthoracic colour Doppler scan led to the diagnosis of the fistula. Because of potential late complications endovascular embolisation of the fistula was successfully performed.
Aged↗
[Lung resection in arteriovenous fistula].
Arteriovenous fistulas of the lung occur as a disease limited to the lung, or as a pulmonary manifestation of hereditary Rendu-Osler-Weber's disease. Typical complications are haemoptysis, haemothorax and cerebral embolism. We report on 3 patients in whom arteriovenous fistulas of the lung were removed by wedge excision or lobectomy. One of them had already suffered cerebral infarction. The indication for operative removal of single lesions is always given with respect to the severe complications of this disease. Decrease of the right-to-left shunt volume can usually be achieved.
Adult↗
Serial duplex scans elucidate the evolving hemodynamics of distal arteriovenous fistulas.
Arteriovenous fistulas at the distal anastomosis have been suggested to improve the patency of prosthetic femorocrural bypasses. We have followed nine patient with bypasses to the crural vessels and distal arteriovenous fistulas using physical examination, pulse volume recordings, and segmental pressure indices. Duplex scans of the distal anastomosis were employed to determine the contribution of arterial and venous outflow to total graft flow. Early graft patency was achieved in all patients. One patient went on to amputation at one week postoperatively for progressive ischemia despite a patent graft. The other eight patients achieved successful revascularization. Healing of ulcers, relief of rest pain, the presence of palpable pulses, good pulse wave amplitude, and normal pressure indices are consistent findings as long as the bypass is patent. One patient died on the fourth postoperative day from a myocardial infarction. The remaining patients have been followed from one to 23 months with follow-up examination every three to four months. Sequential duplex scans show that flow continues into distal arteries while venous outflow diminishes. This corresponds to a reduction in the diameter of the outflow veins while the caliber of arterial runoff is maintained. Patency has been achieved up to 23 months with a mean of 12 months. Venous outflow occlusion precedes graft thrombosis by two to 15 months. Graft occlusion has uniformly necessitated amputation. It may be possible to improve long-term graft patency and limb salvage by surgical revision of the distal anastomosis to reestablish venous outflow.
Aged↗
An unusual case of abdominal arteriovenous fistula.
Arteriovenous fistula between major abdominal vessels is an uncommon occurrence. It most frequently occurs between the aorta and the inferior vena cava; however, when occurring between the other arteries and veins, it is much rarer and has usually been secondary to surgical trauma or penetrating wounds. This is the report of an unusual case of an arteriovenous fistula, secondary to erosion of an atherosclerotic left iliac artery aneurysm into the left iliac vein.
Journal Article↗
Traumatic subclavian arteriovenous fistulae.
Arteriovenous (A-V) fistulae can be congenital or acquired. Acquired arteriovenous fistulae are met with during war as well as civilian practice as a result of penetrating injuries causing perforation in an artery and a vein which are surrounded usually by a firm sheath like the femoral, carotid or subclavian sheath, resulting in a communication between the artery and the vein. In the past, these fistulae were treated either by ligation of the feeding artery or by quadruple ligation after waiting for the collateral circulation to develop and feed the affected limb. The goal of the modern vascular surgeon, however, is to resume vascular continuity of both artery and vein. We were recently faced with a subclavian arteriovenous fistula and aneurysm caused by a gunshot wound of many years' duration. Searching the literature on a detailed technique for complete repair of such a fistula proved fruitless. Hence, we were thrown upon our own resources. We planned this operation which proved safe and successful. Repair of a subclavian arteriovenous fistula is a challenging piece of surgery. The location of this fistula under the clavical and its proximity and connection to important structures in the neck and the thoracic outlet makes its correction difficult and hazardous. The purpose of this paper is to present this method of safe repair and discuss the pitfalls and safeguards.
Arteriovenous Fistula↗
Iatrogenic vertebrojugular arteriovenous fistula.
Arteriovenous fistulae originating from the vertebral artery are rare. We report a patient in whom a vertebral artery-jugular venous fistula developed following insertion of a central venous catheter via the internal jugular vein. The fistula was successfully occluded surgically.
Aged↗
[Renal arteriovenous fistula].
Arteriovenous malformations are important but uncommon differential diagnoses for space occupying renal lesions with unknown genesis. In the following case report, a 41-year-old patient complained about continuing right flank pain. Computer tomography indicated a possible renal cell carcinoma and the patient was admitted to our clinic. Further diagnostics, including contrast medium-enhanced bolus CT, colour coded duplex sonography, renovasography and MR-angiography, revealed a large arteriovenous fistula of the entire right kidney. Because of the size and aneurysmatic appearance of this fistula, we performed a nephrectomy. Since this operation the patient has been free of complaints.
Adolescent↗
Stent-graft repair of peroneal arteriovenous fistula.
Arteriovenous fistulas (AVFs) are infrequently seen in the civilian health-care system; traditionally, these lesions have been treated with ligation, or direct surgical repair with concomitant revascularization. We describe a rare case of a peroneal AVF treated with a stent-graft.
Aged, 80 and over↗
[Pulmonary resection of arteriovenous fistula].
Arteriovenous fistula (AVF) is rare congenital pathology of the bronchopulmonary system vessels. The results of treatment of 12 patients with AVF were analyzed. In 2 (16.6%) patients Randu-Veber-Osler syndrome was diagnosed. In 10 observations the diagnosis was confirmed by the angiography data. All the patients were operated on. One (8.4%) patient died.
Adolescent↗
[Renal arteriovenous fistulae].
Arteriovenous fistulas (AVFs) involving the kidney are rare. They are generally classified as congenital, idiopathic or acquired. The authors present 5 cases of renal arterio-venous communications observed in recent years. These cases don't include the congenital type and represent the forms of AVFs that are more frequently observed (1 idiopathic, 3 iatrogenic, 1 associated with malignancy). This study is aimed at examining the clinical picture and the procedures of detection and monitoring of renal AVFs. The various adopted therapeutic procedures (nephrectomy, surgical ablation, radiological embolization) are analyzed.
Adult↗
The biochemical composition of haemodynamically-stressed vascular tissue. Part 2. The concentrations of protein and connective tissue components in the salt extracts of experimental arteriovenous fistulae.
Arteriovenous fistulae were fashioned between the right external jugular vein and the right common carotid artery in seven experimental sheep, which were then grazed for periods up to 4.25 years. Since the morphological changes in the tissue resemble human atherosclerosis, some of the changes in the extractable protein components in this model were studied. In the experimental venous tissue there was a 1.5-2.5 fold increase in salt-soluble protein. The concentration of extractable collagen was 1.5 times higher in the salt extracts of the experimental veins. The concentration of elastin in the extracts from experimental venous tissue was higher than for the sham-operated veins but the experimental arteries yielded lower levels than the contralateral arteries.
Animals↗
The biochemical composition of hemodynamically stressed vascular tissue: the insoluble elastin of experimental arteriovenous fistulae.
Arteriovenous fistulae between the external jugular vein and the common carotid artery were surgically fashioned in eight sheep. The altered hemodynamics produced morphological changes similar to those observed in human atherosclerosis. The elastica is a major mural component and undergoes considerable structural variation during lesion development. The most significant biochemical changes in the elastin occur in the experimental vein region. These include a quantitative loss particularly in the midregion of the vein and a decrease in the concentration of up to 20% of the crosslinks (desmosine and isodesmosine). There is an increase in the cholesterol content of the elastin purified from both experimental artery and vein. The bound phospholipid was higher in the experimental artery and in the dilated experimental vein. There was a significant time-dependent loss of elastin in the stressed venous tissue.
Amino Acids↗
A case of Rendu-Osler-Weber disease with cerebral hemangioma, multiple pulmonary arteriovenous fistulas and hepatic arteriovenous fistula.
A 46-year-old woman was admitted to the hospital because of dyspnea and palpitation. Physical examination showed severe anemia and cardiac distress. Telangiectases were found in the conjunctivas, lips and oral mucosa. Chest roentogenogram showed an enlarged cardiac silhoutte and multiple coin lesions in both lower lung fields. We diagnosed her as Rendu-Osler-Weber disease (ROW). The angiographic studies showed hemangioma in the foramen of Monro, bilateral multiple pulmonary arteriovenous fistulas, and hepatic arteriovenous fistula with a large distortion of the proper hepatic artery. Although associated vascular dysplasias have been described in patients with ROW, there is no reports on ROW in which multiple vascular abnormalities concomitantly existed such as the present case. In 163 detailed cases of ROW in Japan, the frequency of vascular lesions was summarized, and this result showed that the vascular lesions of the lung were more frequent than that of the liver or brain, in comparison with countries in Europe and America. It is very important for diagnosis and its prognosis to perform a detailed angiographic examinations and to demonstrate the precise sites of the vascular dysplasias in patients with ROW.
Abnormalities, Multiple↗
Classification and surgical management of spinal arteriovenous lesions: arteriovenous fistulae and arteriovenous malformations.
OBJECTIVE: Preexisting spinal arteriovenous malformation nomenclature can be confusing. The aim of this article is to present a modified classification system for spinal arteriovenous lesions and to discuss its implications for microsurgical strategies. METHODS: Based on the literature review of prior classifications as well as on the experience of the senior author (RFS), the authors delineate an anatomically and pathophysiologically based classification to facilitate the description and treatment of these uncommon entities. RESULTS: Spinal arteriovenous lesions are composed of arteriovenous fistulae and malformations. These lesions are classified as extradural, extradural-intradural, or intradural. Intradural lesions are characterized further as ventral or dorsal fistulae or as intramedullary lesions. Intramedullary lesions are characterized as compact or diffuse. A new category, conus medullaris arteriovenous malformations, is described as a distinct entity. CONCLUSION: This updated classification system eliminates confusion related to older nomenclature and is based on the anatomical and pathophysiological features of these lesions. When treating these lesions, the neurovascular team must collaborate closely with their microsurgical and endovascular colleagues. Finally, treatment should be individualized, depending on lesional angioarchitecture and the patient's clinical status.
Arteriovenous Fistula↗
Arteriovenous fistula simulating arteriovenous malformation.
A 36-year-old man was thought (for 20 years) to have an arteriovenous malformation that could not be excised. Repeated ligations of proximal arterial supply to the vascular lesion were only transiently beneficial and may have caused a delay in correct diagnosis because of impaired angioaccess. Once it was discovered that he had an arteriovenous fistula--probably caused by a tonsillectomy at age 6--it was possible to occlude the fistula with detachable balloons. The mass and his headaches subsequently resolved. AV fistulas are caused by trauma. Growth of AVMs is often stimulated by trauma. Both lesions have pulsatile masses associated with overlying bruits. The differential diagnosis can usually be made by arteriography, since AV fistulas are acquired lesions with a single communication between an artery and a vein, whereas AVMs are congenital lesions with multiple, large arterial feeding vessels and numerous arteriovenous communications. Proper diagnosis is important, since AVMs are aggressive lesions that tend to regrow if not completely excised. AV fistulas will be cured if the single arteriovenous communication can be obliterated. Proper treatment for AV fistula is obliteration of the single arteriovenous communication, operatively or with occlusive balloons; treatment of AVMs--when possible--is excision of the entire mass, combined (on occasion) with preoperative embolization of the tumor mass. This case report emphasizes the importance of accuracy in the differential diagnosis between arteriovenous malformations and arteriovenous fistulas; moreover, it demonstrates both the ineffectiveness and deleterious consequences of proximal arterial ligation, since collateral development is enhanced and angiographic access is compromised.
Adolescent↗