Search Results
Results 501 - 550 of 2907
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García-García Héctor M - - 2008
INTRODUCTION AND OBJECTIVES: At present, the effect of paclitaxel on tissue structure at the edges of Taxus(R) stents is unknown. The objective of this study was to investigate in vivo the temporal changes occurring at the edges of paclitaxel-eluting stents using intravascular ultrasound radiofrequency (IVUS-RF) data analysis. METHODS: The study ...
Bicknell Colin - - 2008
PURPOSE: To present a technique that addresses the problem of passing guiding catheters through a stent-graft fenestration and into the target orifice over the wire within the visceral vessel when the fenestration is remote from the top cap. TECHNIQUE: A compliant molding balloon is introduced into the main body of ...
Xu Shang Dong - - 2009
Open stent-graft has been used in the treatment of aortic dissection in recent years. Two device related complications happened in two patients. One was stenosis of the true lumen in the descending aorta caused by infolding of the distal end of the stent-graft immediately after its deployment. The other one ...
Sze Daniel Y - - 2008
Excessive shunting through transjugular intrahepatic portosystemic shunts (TIPS) can cause life-threatening hepatic encephalopathy and insufficiency. Intentional reduction of flow may be effective but difficult to control. The present report describes refinements of the parallel stent/stent-graft technique of flow reduction that is adjustable in either direction. Six patients underwent TIPS reduction ...
Choi Jin Woo - - 2009
INTRODUCTION: In conjunction with intravenous and/or intra-arterial thrombolysis, adjuvant revascularization of intracranial artery occlusion by angioplasty vs. stenting remains controversial. We evaluated outcome in patients with intracranial occlusion after angioplasty and/or stenting. MATERIALS AND METHODS: Thirty-three patients who underwent angioplasty or stenting (17 stenting and 16 angioplasty) for intracranial arterial ...
Wanke Isabel - - 2008
Treatment of wide-necked aneurysms by endovascular coil embolization usually requires mechanical aids in order to protect the parent artery from occlusion due to extension of coils or thrombosis. Endovascular stents are one tool that can be deployed to solve this essentially mechanical problem. The effect of a stent placed in ...
van den Berg J C - - 2008
This paper deals with the treatment of acute neurological complications that may occur during carotid angioplasty with stenting. Endovascular 'neurorescue' techniques include mechanical thrombus removal (using retrieval devices, aspiration catheters, and wire or balloon fragmentation) and local and intra-arterial thrombolysis. The treatment of acute thrombosis and dissection during carotid artery ...
Bhatt Archit - - 2009
OBJECTIVE AND IMPORTANCE: Treatment of symptomatic chronic totally occluded carotid artery has been limited to medical management. An ongoing clinical trial is examining the role of extracranial to intracranial bypass surgery in select patients with impaired cerebrovascular reserve based on PET imaging parameters. We describe a case utilizing stenting and ...
Montorsi Piero - - 2010
BACKGROUND: A controversial aspect of carotid artery stenting (CAS) is the placement of a stent with or without predilation. The study was designed to test the hypothesis that direct stenting (DS) was not inferior to CAS with predilation. METHODS: Elective CAS with filter protection was performed in 205 consecutive, unselected ...
Neglén Peter - - 2008
Arterial stenting across joints is not recommended because of increased risk of in-stent focal neointimal hyperplasia and compression or fracture of the stent by joint motion with decreased long-term patency. The aim of this study was to assess the risk of placing stents in the venous system across the inguinal ...
Bosiers Marc - - 2008
The importance of angioplasty and stenting in the treatment of carotid artery disease cannot be underestimated. Successful carotid stenting does not only depend on the operator's skills and experience but also on an adequate selection of cerebral protection devices, and carotid stents can help avoid neurological complications. A broad spectrum ...
Santoro Giuseppe - - 2008
Bilateral arterial ducts feeding discontinuous pulmonary arteries are a very rare anatomic arrangement in complex heart malformations with pulmonary atresia. In this setting, neonatal ductal closure may result in abrupt pulmonary hypoperfusion and life-threatening systemic hypoxia. In high-risk patients, percutaneous arterial duct stenting might be an engaging and cost-effective alternative ...
Kim Jason K - - 2008
We report a deployment technique that eliminates "watermelon seeding" of the "giant" Palmaz stent in the treatment of type IA endoleak after endovascular abdominal aneurysm repair. A 5010 Palmaz stent (Cordis Corp, Miami Lakes, Fla) is asymmetrically hand-crimped on an appropriately sized valvuloplasty balloon that assures that the proximal (cranial) ...
Gordon Brent M - - 2008
BACKGROUND: Covered stents may be desirable for stenting of coarctations. OBJECTIVES: To evaluate the ability of Atrium expanded polytetrafluoroethylene (ePTFE)-covered stents to be implanted and then serially dilated to the size of the adjacent aorta during a rapid growth period in swine. METHODS: Eight Yorkshire pigs (7 females) with a ...
Sparman A - - 2008
Percutaneous transluminal coronary angioplasty (PTCA) is a novel procedure to Barbadian healthcare. Only one centre in Barbados provides PTCA and stenting. This is a retrospective study aimed at describing the initial results of coronary angioplasty and stenting in the first 48 patients at the Carib-American Heart Centre and exploring the ...
Iwata Hiroshi - - 2008
Stent thrombosis has been recognized as a potentially critical complication in percutaneous coronary intervention. In the bare-metal stent era, stent thrombosis was considered to be an acute or subacute event, occurring within 1 month after stent implantation. Recently, late or very late stent thrombosis after drug-eluting stent implantation has been ...
Bussière Miguel - - 2008
OBJECT: Conventional endovascular therapy for carotid stenosis involves placement of an embolic protection device followed by stent insertion and angioplasty. A simpler approach may be placement of a stent alone. The authors determined how often this approach could be used to treat patients with carotid stenosis, and assessed which factors ...
Langeveld B E - - 2008
To explore the hypothesis that stent placement decreases dilator function of various arteries outside the stented segment and that angiotensin- (1-7) improves this function, and to assess the contribution of dilator signal compounds. A further objective was to test the hypothesis that on-stent delivery of Ang-(1-7) reduces neointima formation and ...
Park Seong-Ho - - 2008
Stenting is a useful alternative treatment modality in carotid artery stenosis patients who are too high-risk to undergo carotid endarterectomy (CEA). We report a case of contralateral cerebral infarction after stenting for extracranial carotid stenosis. A 78-year-old woman was admitted to the hospital with left-sided weakness. Based on magnetic resonance ...
Carnevale Francisco C - - 2008
PURPOSE: To evaluate retrospectively the midterm and long-term results of percutaneous endovascular treatment of venous outflow obstruction after pediatric liver transplantation. MATERIALS AND METHODS: During a 9-year period, 18 children with obstruction of a hepatic vein (HV) or inferior vena cava (IVC) anastomosis underwent percutaneous transluminal angioplasty (PTA) with balloon ...
Yevzlin Alexander S - - 2009
A case is presented and a novel technique is described by which an endovascular stent is deployed in the venous outflow system of an arteriovenous fistula without the traditional exchange to a larger diameter introducer sheath.
Kelly M E - - 2008
A 43-year-old patient with a basilar apex aneurysm had a 4.5-mm x 14-mm Enterprise stent placed from the midbasilar artery to the left P1 segment of the posterior cerebral artery. The patient experienced vertigo 4 months after stent placement and 1 week after stopping clopidogrel. At 5 months postembolization, angiography ...
Barthwal Rohit - - 2008
Stent thrombosis is an infrequent but severe complication after coronary stent implantation. Dual antiplatelet therapy has markedly reduced the occurrence of this potentially catastrophic event. The optimal duration of clopidogrel therapy in patients with drug-eluting stents is unknown. We describe a case of stent thrombosis 9 days after discontinuation of ...
Stampfl Ulrike - - 2008
The purpose of this study was to investigate the potential of nanoscale coating with the highly biocompatible polymer Polyzene-F (PZF), in combination with cobalt chromium and stainless steel stents, to reduce in-stent stenosis, thrombogenicity, and vessel wall injury and inflammation. One bare cobalt chromium, PZF-nanocoated stainless steel or PZF-nanocoated cobalt ...
Saeed Bilal - - 2008
Percutaneous intervention of tortuous coronary arteries can be challenging. We describe four cases that illustrate complications associated with coronary tortuosity (coronary dissection and stent loss) and strategies that can improve procedural success (such as use of soft delivery catheters, deep guide intubation, meticulous vessel preparation, and use of short, thin-strut ...
Maintz David - - 2009
The aim of this study was to test a large sample of the latest coronary artery stents using four image reconstruction approaches with respect to lumen visualization, lumen attenuation, and image noise in dual-source multidetector row CT (DSCT) in vitro and to provide a CT catalogue of currently used coronary ...
Baldwin Z K - - 2008
Thoracic endovascular aortic repair (TEVAR) may involve either planned or inadvertent coverage of aortic branch vessels when stent grafts are implanted into the aortic arch. Vital branch vessels may be preserved by surgical debranching techniques or by placement of additional stents to maintain vessel patency. We report our experience with ...
Zipfel B - - 2008
AIM: The aim of this study was to evaluate the safety and efficacy of a new endovascular thoracic stent-graft, which was designed to overcome the restrictions of previously used stent-grafts. METHODS: Between May 2004 and March 2008 a prospective evaluation was conducted in 126 consecutive patients (71% men; age 64 ...
Garcia-Garcia Hector M - - 2008
Stent thrombosis is one of the major concerns after drug-eluting stent implantation. Multiple mechanical causes (i.e., stent under-expansion, edge dissection, geographic miss, residual stenosis, incomplete stent apposition and aneurysm) have been postulated. These features are easily identifiable by intravascular ultrasound. However, it is uncertain which of them are inextricably related ...
Ohrlander Tomas - - 2008
PURPOSE: To report an alternative to the fenestrated stent-graft for preserving blood flow to side branches in the sealing zones of aortic stent-grafts. TECHNIQUE: A covered stent is deployed parallel to the main aortic stent-graft, protruding somewhat proximally, like a chimney, to preserve flow to a vital side branch covered ...
Butera Gianfranco - - 2008
OBJECTIVES: To evaluate the possibility to redilate covered Cheatham-Platinum stents during follow-up, in particular in growing children with aortic coarctation. BACKGROUND: There are no data in the literature about the redilation of ePTFE covered CP stents. METHODS: Sixty covered CP stents were implanted in patients with aortic coarctation or recoarctation ...
Ormiston John A - - 2008
This study provides insights into "crush" coronary bifurcation stenting through imaging of bench deployments. Although the strategy of provisional side-branch stenting is widely accepted for suitable bifurcation lesions, there is no consensus on the best option for elective stenting with 2 stents. The crush technique has the potential to scaffold ...
Jamshidi Peiman - - 2008
Stents are the most important advance for percutaneous coronary revascularization. After introduction of drug eluting stents, in-stent restenosis ist not more a major problem of coronary intervention. However, restenosis by bare metal stents, peripheral embolism following stent implationtan in old vein grafts, and conditions in which there is a discontinuity ...
Arbabi Azim - - 2009
This study was conducted to assess the suitability of (48)V radioactive stent for use in renal artery brachytherapy. A nickel-titanium alloy Nitinol stent was irradiated over the proton energy range of up to 8.5 MeV, to obtain (48)V. The depth dose distribution analysis of the activated stent was done with ...
Kobayashi Toshiyuki - - 2008
A Genesis stent was implanted in two children, one with superior vena caval (SVC) stenosis and one with pulmonary artery branch stenosis. Case 1 was a 2-month-old baby with SVC stenosis following intracardiac repair for total anomalous pulmonary venous connection (TAPVC) and case 2 was a 2-year-old child with left ...
Puls Ralf - - 2008
Two patients with dissecting (n = 1) and saccular (n = 1) aneurysms of the infrarenal abdominal aorta with very narrow proximal and distal aortic necks underwent treatment with percutaneous implantation of self-expandable polytetrafluoroethylene (PTFE)-covered nitinol stent-grafts on an off-label basis. The stent-grafts had maximum diameters of 13.5 mm and ...
Kleinstreuer C - - 2008
A finite element analysis of tubular, diamond-shaped stent grafts under representative cyclic loading conditions for abdominal aortic aneurysm (AAA) repair is presented. Commercial software was employed to study the mechanical behavior and fatigue performance of different materials found in commercially available stent-graft systems. Specifically, the effects of crimping, deployment, and ...
Lam S K - - 2008
Endovascular aortic stent-graft is a new, minimally invasive procedure for treating thoracic aortic diseases, and has quickly evolved to be one of the standard treatments subject to anatomic constraints. This procedure involves the placement of a self-expanding stent-graft system in a high-flow thoracic aorta. Stent-graft deployment in the thoracic aorta, ...
Yasuoka Yoshinori - - 2009
Tortuous coronary arteries frequently make percutaneous coronary intervention (PCI) difficult by causing less accessibility of guidewire toward the target lesion. After guidewire has been passed through the target lesion, it often assists a balloon catheter and stent system insertion along the stiff guidewire. However, artificial kinking and wrinkling might induce ...
Applegate Robert J - - 2008
Stent thrombosis occurs infrequently after drug-eluting stent (DES) placement, but concerns have surfaced that identification of stent thrombosis based solely on angiography may underestimate the true incidence of this complication. The purpose of this study was to compare rates of stent thrombosis using Academic Research Consortium (ARC) definitions. From April ...
Geiger Timothy M - - 2008
BACKGROUND: Permanent metal stent placement for malignant intestinal obstruction has been proven to be efficient. Temporary stents for benign conditions of the colon and rectum are less studied. This is a case study, review of the literature, and observation from an animal model on placement of stents in the colorectum ...
Ho Chen-Hsun - - 2008
PURPOSE: To evaluate whether stent length affects the symptoms after stent insertion and to determine the appropriate stent length according to the stent configurations and the related symptoms simultaneously. PATIENTS AND METHODS: A total of 87 patients who underwent ureteroscopic lithotripsy (URSL) and double-pigtail ureteral stent (22, 24, or 26 ...
Hussain Arif - - 2008
We sought to assess the outcome of transcatheter ductus arteriosus stenting in newborns with ductal-dependent pulmonary circulation. Better results of ductal stenting have been reported using stents with better scaffolding and ensuring stenting of the entire length of the ductus arteriosus. Twenty-one patients with ductal-dependent pulmonary circulation were brought to ...
Omurlu Kenan - - 2008
Subintimal or false lumen stent deployment is a rare complication of percutaneous coronary interventions. The most balloon-induced small non-flow limiting dissections heal spontaneously and can be treated medically with close observation if distal coronary flow is not compromised. However, the complex and severe flow-limiting postprocedural dissections may result in abrupt ...
LaBounty Troy - - 2008
RATIONALE AND OBJECTIVES: Compare stent size selection using coronary computed tomography angiography (CCTA) to invasive coronary angiography (ICA). CCTA is increasingly performed before cardiac catheterization; however, the utility of incorporating these data into coronary interventions is unknown. METHODS: Retrospective study of 18 consecutive patients with 24 coronary artery lesions evaluated ...
Hacein-Bey Lotfi - - 2008
Only 10 years ago, a review of the use of stents to treat cerebrovascular disease would have resulted in a limited report. Currently, however, stents increasingly are used in clinical practice, and this trend is expected to grow exponentially as a result of constant technologic improvements and refinements and cross-fertilization ...
Reffelmann Thorsten - - 2008
In general, coronary stents, when deployed in a coronary artery by conventional balloon expansion, appear to be tightly forced into the vessel wall, virtually precluding intentional or unintentional removal of the stents. Here, we present a case of unintended coronary stent extraction during cutting balloon angioplasty for high-grade in-stent restenosis ...
Varghese Indu - - 2008
Stent thrombosis is a rare but serious complication of percutaneous coronary intervention. Stent thrombosis usually occurs early after stent implantation but can occasionally occur late, especially when drug-eluting stents are used. We report a case of recurrent late paclitaxel-eluting stent thrombosis (8 and 21 months after initial stent implantation) upon ...
Kenny Damien - - 2008
OBJECTIVES: We describe our complete experience with covered stent implantation for aortic coarctation including short- to medium-term outcomes. Background: Coarctation of the aorta is a heterogeneous disease process with multiple associated complications both with and without treatment. Covered stents have evolved to provide greater support to the aortic wall and ...
Araki Takuji - - 2008
Ureteroarterial fistula is a rare condition with life-threatening hematuria that should be diagnosed and treated immediately. We reported two patients of ureteroarterial fistula who underwent successful endovascular treatment by stent-grafts. They had undergone pelvic surgery followed by placement of an indwelling ureteral stent for stricture of the ureter before sudden ...
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