• The combination of endovascular reconstruction of the parent vessel with use of a self-expanding stent followed by coil embolization offers a promising therapeutic alternative for wide-necked aneurysms not amenable to coil embolization alone. (ajnr.org)
  • The endovascular approach is an elegant alternative to craniotomy and neurosurgical clipping of cerebral aneurysms. (ajnr.org)
  • In many aneurysms, endovascular therapy is feasible, specifically in those with a small neck. (ajnr.org)
  • The geometry of wide-necked aneurysms sometimes makes it impossible to treat the aneurysm through the endovascular route or at least reduces the possibility of obtaining satisfactory coil packing. (ajnr.org)
  • The technique of using an intravascular stent to create a bridging scaffold followed by endovascular placement of coils through the interstices of the stent into a wide-necked or fusiform aneurysm has been described in experimental studies ( 3 - 5 ) and in humans ( 6 - 14 ). (ajnr.org)
  • This technique may provide another treatment option for patients with wide-necked aneurysms in whom direct surgical clipping or conventional endovascular therapy would be difficult or impossible, and in whom parent artery occlusion is not a feasible option. (ajnr.org)
  • Endovascular embolization is generally performed with platinum coils to fill the aneurysm, whether by remodeling stent-assisted or not. (scielo.br)
  • BACKGROUND: Endovascular aneurysm repair (EVAR) has been proved to be effective and safe in the elective management of abdominal aortic aneurysms (AAAs). (up.ac.za)
  • Endovascular aneurysm repair (EVAR) has provided a safe and effective alternative to the standard open repair of abdominal aortic aneurysms (AAAs). (up.ac.za)
  • While aortic aneurysms are common worldwide, it is difficult to determine their exact prevalence because they usually cause no symptoms unless they rupture. (medlineplus.gov)
  • Although fibrinoid necrosis and Charcot-Bouchard aneurysms (CBAs) have been postulated to underlie vessel rupture in ICH, the role and significance of CBAs in ICH has been controversial. (nature.com)
  • With regard to the high amount of Von Mises stress, the risk of rupture of the aneurysm is higher in this case. (karger.com)
  • Abdominal aortic aneurysms (AAA) occur in 5 to 9% of the population over the age of 65 years and transmural aneurysm rupture is the 10th most common cause of death in the industrialized world. (materialise.com)
  • Ascending thoracic aortic aneurysm (ATAA) is caused by the progressive weakening and dilatation of the aortic wall and can lead to aortic dissection, rupture, and other life-threatening complications. (nih.gov)
  • Currently, the main predictors of rupture risk are the Dmax, sex, and the expansion rate of the aneurysm. (umontreal.ca)
  • Le Dmax manque de sensibilité pour détecter le risque de rupture, en particulier pour les petits anévrysmes. (umontreal.ca)
  • En vue d'identifier de nouveaux paramètres géométrique associés avec le risque de rupture, nous avons réalisé une étude cas-témoin comparant 63 cas avec AAA rompu ou symptomatique et 94 contrôles avec AAA asymptomatique. (umontreal.ca)
  • Dans l'analyse de régression logistique multivariée, en ajustant pour le Dmax et le sexe, les AAA avec un bombement plus haut situé et une surface moyenne plus élevée étaient associés à une rupture. (umontreal.ca)
  • Intracranial aneurysm (IA) rupture is responsible for 80% of spontaneous arachnoid hemorrhages and associated with an extremely high mortality rate. (scielo.br)
  • Aneurysms larger than 10mm or located in the posterior circulation present an even higher risk of rupture. (scielo.br)
  • A false aneurysm is a rare complication of myocardial infarction and develops when myocardial rupture is contained by pericardial adhesions or scar tissue. (eurorad.org)
  • However, enhancement of the pericardium has been shown to be more frequent in patients with false aneurysms: it is thought to result from the seepage of blood into the pericardial space at the time of rupture, with subsequent pericardial inflammation and fibrosis [3, 4, 5]. (eurorad.org)
  • To report a family with autosomal dominant cutis laxa and a young girl with sporadic cutis laxa, both with variable expression of an aortic aneurysmal phenotype ranging from mild dilatation to severe aneurysm or aortic rupture. (bmj.com)
  • Management depends on the location, shape, and size of the aneurysm, as well as symptoms and concomitant cardiovascular disease. (logicalimages.com)
  • 2] Eli Konen, Naeem Merchant and Carlos Gutierrez et al (2005) True versus False Left Ventricular Aneurysm: Differentiation with MR Imaging-Initial Experience. (eurorad.org)
  • Saccular aneurysms involve a bulging of only portion of the vessel wall, whereas fusiform aneurysms involve the entire circumference of a vessel wall. (healthhype.com)
  • A saccular aneurysm may vary from 5 to 20 centimeters (cm) while a fusiform aneurysm can reach 20 centimeters in diameter. (healthhype.com)
  • Saccular aneurysm on transverse arch. (sgul.ac.uk)
  • Pseudoaneurysm denotes a ruptured aortic wall with healing of the extravasated blood and formation of the aneurysm wall by fibrous tissue. (medscape.com)
  • Most commonly, the pathogenesis of the aneurysms is due to noninflammatory, medial degeneration of the elastic aortic wall. (medscape.com)
  • However, the long term prognosis and natural history of Kawasaki disease, particularly in patients with regressed coronary aneurysms or with normal coronary arteries, remain uncertain. (bmj.com)
  • On the basis of our own 3-11 and other 12-14 previous studies, we felt there was a need to examine prospectively the long term consequences of regressed coronary aneurysms and normal coronary arteries after Kawasaki disease. (bmj.com)
  • but it has been extended to lesions of arteries, as well as to dilatations of the heart. (vineyard.net)
  • Four consecutive patients with a wide-necked intracranial aneurysm were treated with a combined approach that consisted of delivery of a flexible self-expanding neurovascular stent through a microcather to cover the neck of the aneurysm and subsequent filling of the aneurysm with coils through the stent interstices. (ajnr.org)
  • 3D biomodels represented the aneurysm angioarchitecture exactly, especially the neck and domus features. (scielo.br)
  • Microsurgical clipping uses a titanium clip that occludes the aneurysm neck. (scielo.br)
  • With a false aneurysm, blood collects between the media and adventitia thereby causing the adventitia to bulge. (healthhype.com)
  • These imaging finding suggested an enhancing pericardium containing a false aneurysm, confirmed at surgery. (eurorad.org)
  • We assessed the technical feasibility and efficacy of the combined application of a flexible, self-expanding neurovascular stent and detachable coils in the management of wide-necked intracranial aneurysms in humans. (ajnr.org)
  • We studied the technical feasibility and efficacy of a new, extremely flexible, self-expanding neurovascular stent in combination with subsequent coil embolization for the treatment of wide-necked intracranial aneurysms. (ajnr.org)
  • Intracranial aneurysms (IA) are abnormal dilatations that can arise in any blood vessels of the intracranial circulation due to histopathological and hemodynamic alterations. (scielo.br)
  • Intracranial aneurysms: current evidence and clinical practice. (scielo.br)
  • Clipping versus coiling for ruptured intracranial aneurysms: a systematic review and meta-analysis. (scielo.br)
  • The purpose of this study is to evaluate the effect of a partly blocked vessel on an aneurysm. (karger.com)
  • in the second case, modeling is performed for an ideal geometry of the aneurysm in the MCA with a partly blocked vessel. (karger.com)
  • So, the risk of growth of the aneurysm is higher in cases with a partly blocked vessel. (karger.com)
  • Although immediate angiographic results are promising, long-term angiographic and clinical follow-up is essential to determine permanent vessel patency and aneurysm occlusion rate. (ajnr.org)
  • An aneurysm is an abnormal dilatation of a blood vessel which is localized to one portion of the vessel. (healthhype.com)
  • CONCLUSIONS There is evidence of persisting abnormal vascular wall morphology and vascular dysfunction at the site of regressed coronary aneurysms in patients with previous Kawasaki disease. (bmj.com)
  • CBAs, also known as miliary aneurysms or microaneurysms, are small aneurysms that arise from arterioles usually less than 300 µm in diameter [ 18 ]. (nature.com)
  • Objective The aim of this study was to investigate the reproducibility of anterior-posterior diameter (APd max ) and three-dimensional lumen volume (3DLV) measurements of abdominal aortic aneurysms (AAA) in a classical murine AAA model. (thieme-connect.com)
  • This is because, generally, if the aneurysm diameter is greater than 1.5 times a normal aorta's size, it is known as an aneurysm. (onteenstoday.com)
  • As today, due to current existing solutions, only the maximum diameter is monitored, more complex geometric indicators such as aneurysm volumes help physicians assess risks of ruptures. (mitacs.ca)
  • Idiopathic, noninflammatory aneurysms are associated with congenital conditions (bicuspid aortic valve) and acquired conditions (hypertension). (medscape.com)
  • Ascending aortic dilatation associated with bicuspid aortic valve: pathophysiology, molecular biology, and clinical implications. (msdmanuals.com)
  • Any dilation greater than this and it is considered an aneurysm. (onteenstoday.com)
  • Recognition of a bicuspid valve, even in a patient who has normal valve function, is important for purposes of follow-up because of the association of bicuspid valves with an aortopathy that results in progressive aortic root or ascending aortic dilation and aneurysm formation. (msdmanuals.com)
  • Ruptured aortic aneurysms and dissections are estimated to cause almost 30,000 deaths in the United States each year. (medlineplus.gov)
  • This explained the sudden dilatation: aneurysms in these mice are more reminiscent of aortic dissections. (materialise.com)
  • We present five patients with aneurysm and compare the clinical and pathologic findings with those of eight patients described in the literature. (neurology.org)
  • Asymptomatic thoracic aortic aneurysm (TAA) patients can have cardiothoracic consultation for close outpatient follow-up or immediate bedside consultation for any other emergent concerns. (logicalimages.com)
  • Aortic aneurysms usually have no symptoms. (medlineplus.gov)
  • Patients with idiopathic, noninflammatory aneurysms are typically adults and present with symptoms of aneurysm later than do those patients with identified connective tissue disorders. (medscape.com)
  • Patients with connective tissue disease with aortic root aneurysm are at risk of dissection and progression of the dilatation. (aats.org)
  • 1 , 2 Approximately 50% of coronary aneurysms occurring in the acute stage of this disease were shown to regress within several years, and normal angiographic findings were demonstrated. (bmj.com)
  • In 2015, he won a Mimics Innovation Award for his research on the morphology of abdominal aortic aneurysms in mice infused with angiotensin II. (materialise.com)
  • The virtual 3D models greatly enhanced Dr. Trachet's capacity to study the morphology of the abdominal aortic aneurysms present in angiotensin II-treated mice. (materialise.com)
  • In one patient, aneurysm perforation with the microcatheter occurred and necessitated ventricular drainage, which led to a large parenchymal and intraventricular hemorrhage because of the strong anticoagulation regimen. (ajnr.org)
  • 3] S Gill,D J Rakhit,S K Ohri et al (2011) Left ventricular true and false aneurysms identified by cardiovascular magnetic resonance. (eurorad.org)
  • Stent placement in the desired position with complete or nearly complete occlusion of the aneurysms was feasible in all patients. (ajnr.org)
  • age range, 43-49 years) with a wide-necked intracranial aneurysm were treated with the Neuroform microdelivery stent system (Smart Therapeutics, Inc./Boston Scientific, San Leandro, CA) and detachable platinum coils. (ajnr.org)
  • 4 Martin-McNulty B, Vincelette J, Vergona R, Sullivan ME, Wang Y-X. Noninvasive measurement of abdominal aortic aneurysms in intact mice by a high-frequency ultrasound imaging system. (thieme-connect.com)
  • Although mice are the most commonly used animals in aneurysm research , there are some important differences between aneurysms that form in mice treated with angiotensin II, on the one hand, and aneurysms that form spontaneously in humans, on the other hand. (materialise.com)
  • In mice, the abdominal aortic aneurysm forms suprarenally (i.e. above the kidneys), while in humans most aneurysms form infrarenally (i.e. below the kidneys). (materialise.com)
  • Aneurysms in mice often develop an intramural thrombus rather than an intraluminal thrombus as we see in human aneurysms. (materialise.com)
  • In this project, we aim at validating an automated aneurysm (lumen + thrombus) segmentation software developed by Nurea. (mitacs.ca)
  • Risk factors for IA include family history, hereditary disorders predisposing aneurysm formation, age (younger than 50 years old), gender (female), tobacco and cocaine consumption 1 1. (scielo.br)
  • Dr. Bram Trachet, post-doctoral researcher at École Polytechnique Fédérale de Lausanne (EPFL) in Switzerland, explores novel high-resolution imaging techniques as well as image-guided histology to visualize experimental aneurysms in laboratory animals. (materialise.com)
  • Radiation dose measurements during INR were performed in 332 patients with unruptured aneurysm (URAN), dural arteriovenous fistula (DAVF), and arteriovenous malformation (AVM). (go.jp)
  • Patients with aortitis and aneurysms present at middle age or older, including advanced ages, especially in the case of giant cell aortitis. (medscape.com)
  • and the remaining 51% had idiopathic noninflammatory aneurysms, with approximately 60% of this last group of patients being hypertensive. (medscape.com)
  • L'objectif de ce travail était de décrire le profi l des manifestations cardiovasculaires chez les patients vivants avec le VIH en le comparant à celui de patients séronégatifs. (bvsalud.org)
  • Despite enormous advancement in the development of flexible microcatheters, coil configurations, and embolic materials, wide-necked aneurysms still remain a therapeutic challenge. (ajnr.org)
  • DEAR DR. ROACH: In January, I received a diagnosis of an abdominal aortic aneurysm measuring 2.9 centimeters. (sunjournal.com)
  • Computed tomography confirmed an ALCAPA diagnosis and showed dilatation of left chambers with no additional abnormalities. (ctsnet.org)
  • Aneurysms do not always appear like a balloon extending from the wall. (healthhype.com)
  • True aneurysms represent areas of bulging, scarred and thinned myocardium, which are dyskinetic and usually located at the anterior wall and apex. (eurorad.org)
  • Both types of aneurysm may show contrast delayed enhancement in the wall of the aneurysm sac. (eurorad.org)
  • Pathologically, noninflammatory aneurysms demonstrate degrees of cystic, medial degeneration, depending on etiology or association. (medscape.com)