Search Results
Results 451 - 500 of 3017
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Kapadia Muneera R - - 2008
BACKGROUND: Late failure of prosthetic vascular bypass grafting using expanded polytetrafluoroethylene (ePTFE) is secondary to the development of neointimal hyperplasia, most commonly at the distal anastomosis. To develop therapies that can improve upon current prosthetic vascular bypass grafting, a large animal model of prosthetic bypass grafting that results in reproducible ...
Francisca Kartono; Western University ...
We report a case of large aortic and femoral thrombi causing bilateral lower extremity arterial insufficiency in a protein C deficient patient. After aorto-bifemoral bypass graft, the patient developed graft occlusion within 3-years despite long-term anticoagulation, though there were minimal periods of non-compliance. Protein C and/or S deficiencies are most ...
Cacho Fernando - - 2007
In coronary artery bypass graft (CABG) surgery the involved tissues are overstretched, which may lead to intimal hyperplasia and graft failure. We propose a computational methodology for the simulation of traditional CABG surgery, and analyze the effect of two clinically relevant parameters on the artery and graft responses, i.e., incision ...
Nishida Satoru - - 2007
Minimally invasive direct coronary artery bypass grafting (MIDCAB) using an H graft was performed on a 74-year-old man with advanced prostatic cancer who needed coronary revascularization. Through a left anterior small thoracotomy, the left internal thoracic artery (LITA) and the left anterior descending artery (LAD) were cleared, and a short ...
Kawatsu Satoshi - - 2007
BACKGROUND: Stenosis at a vascular anastomotic site has been a significant clinical issue. We tested the hypothesis that rapamycin-eluting biodegradable poly L-lactic acid and epsilon-caprolactone copolymer (PLA-CL) film applied externally can inhibit neointimal hyperplasia in a canine vascular anastomosis model. METHODS: Femoral artery graft interposition was performed in 25 beagles. ...
Sekarski Nicole - - 2007
BACKGROUND: We analyzed the results in two centers of using bovine jugular vein graft for right ventricular outflow tract reconstruction. METHODS: From April 1999 to July 2005, 133 children with a median age of 30.9 months (range, 4 days to 19 years) underwent graft implantation. Echocardiography was performed during follow-up ...
Mujanović Emir - - 2007
The aim of this study was to analyze the Transit time flow measurement (TTFM) experience in the first 1000 CABG operations. First 1000 patients had coronary artery bypass grafting (CABG) performed in Cardiovascular Clinic, University Clinical Centre Tuzla, Bosnia and Herzegovina, between September, 1998 and September, 2003. CABG without use ...
Kon Zachary N ZN Division of Cardiac Surgery, University of Maryland School of Medicine, Baltimore, Maryland 21201, - - 2007
Saphenous vein grafts (SVG) used for coronary artery bypass surgery (CABG) often develop a gradual luminal narrowing over the first year due to neointimal hyperplasia (NH). Although the basic science of NH is well studied, our clinical understanding of this issue is limited. The purpose of this cohort study was ...
Xiong F L - - 2008
Anastomotic haemodynamics, which plays an important role in the performance of bypass graft, is known to be profoundly affected by the diameter ratio (Phi) and angle (alpha) between the graft and host artery in the peripheral region. We hypothesize that these geometric factors would play similar roles in distal coronary ...
Cohn William E - - 2007
Because of their small size, rotary left ventricular assist devices (LVADs) can be implanted through several alternative approaches, including transdiaphragmatic LVAD insertion through a left subcostal incision with anastomosis of the outflow graft to the retroperitoneal supra-celiac aorta and a left thoracotomy approach with anastomosis to the descending thoracic aorta. ...
Hattori Keisuke - - 2007
Beta-adrenoceptor antagonist celiprolol has been widely used as an effective antihypertensive agent. Some studies reported that celiprolol enhances nitric oxide production. The purpose of the present study is to examine the effects of celiprolol on vein graft intimal hyperplasia and endothelium-dependent nitric oxide (NO)-mediated relaxation. Japanese white rabbits were randomized ...
Staffa R - - 2007
The absence of infra-popliteal runoff in patients with acute limb-threatening ischaemia due to thrombosed popliteal aneurysm entails a high risk of amputation. If sufficient runoff cannot be restored by thrombolysis of crural arteries or by thrombectomy, the only chance to salvage the limb is pedal bypass grafting. The authors present ...
Wallitt Edward J W - - 2007
Intimal hyperplasia is central to the pathology of vein graft re-stenosis, and despite considerable advances in our understanding of vascular biology since it was first described 100 years ago, it is still a significant clinical problem. Recent decades have seen the development of many new therapeutic agents aimed at treating ...
Schwann Thomas A - - 2007
BACKGROUND: Coronary artery bypass grafting with concomitant coronary endarterectomy (CABG/CE) is used in patients with severe coronary atherosclerosis to revascularize otherwise ungraftable targets. This study investigates the efficacy of arterial versus vein grafting for CABG/CE surgery. METHODS: We reviewed our experience in 288 CABG/CE patients (63 +/- 10 years, 207 ...
Asciutto Giuseppe - - 2007
Three cases of cystic adventitial disease (CDA) of the popliteal artery and the results of a literature review are described in order to identify the treatment of first choice of this rare clinical entity. Three male patients (mean age 56,3 years) presented at our Institution due to a sudden abrupt ...
Biancari Fausto - - 2007
PURPOSE: The Spyder aortic connector (Medtronic, Minneapolis, MN) is a new, promising connector device and its safety and efficacy have been evaluated in this study. DESCRIPTION: Twenty-two patients were randomized to proximal vein graft anastomosis with the Spyder aortic connector (Medtronic) or hand-sewn technique. EVALUATION: Twenty patients underwent multi-detector computed ...
Neufang Achim - - 2007
Femoropopliteal bypass still is the standard surgical therapy for disabling claudication and critical ischemia. When autologous vein is not suitable synthetic or biological prostheses may be considered. Second generation glutaraldehyde tanned human umbilical vein (HUV) graft was chosen for above and below knee femoropopliteal bypass when autologous vein was not ...
Neufang A - - 2007
OBJECTIVE: To audit a single center consecutive series of infrapopliteal composite bypasses with second generation glutaraldehyde stabilized human umbilical vein. DESIGN: Retrospective study. PATIENTS: From January 1996 to July 2006 89 femoro-distal bypasses were constructed in 85 patients with HUV and residual vein segments as composite grafts in the absence ...
Wang Yinong - - 2007
Vascular remodeling rather than intimal thickening is the most important determinant of luminal loss in cardiac graft arteriosclerosis. The impact of donor-transmitted atherosclerotic lesions on alloimmune-mediated arterial injury in an experimental setting is not known. We investigated this issue in a chimeric model of human coronary artery grafts to immunodeficient ...
Conte Michael S - - 2007
Surgical bypass of arterial occlusions using autogenous vein provides an effective treatment for many patients with advanced coronary or peripheral atherosclerosis. However, the long-term benefit of bypass surgery is limited by the development of de novo occlusive lesions within the vein graft, which occurs in a significant percentage of patients ...
Balacumaraswami Lognathen - - 2007
Graft patency verification is increasingly recognized as an important component of coronary artery bypass grafting. Intuitively, eliminating intraoperative graft failure should reduce cardiac mortality and morbidity in the short term and improve clinical outcome in the long term. Although conventional angiography remains the gold standard technique for assessing graft patency, ...
Azmoun Alexandre - - 2007
BACKGROUND: The internal thoracic artery (ITA) is considered to be the conduit of choice for coronary artery bypass grafting surgery (CABG). In triple-vessel-disease patients, CABG can be performed exclusively using both ITAs in a Y fashion with multiple sequential side-to-side coronary anastomoses. The aim of this prospective study was to ...
Heckenkamp J - - 2007
BACKGROUND: Bypass surgery has a failing frequency of 30% during the first year, mainly due to intimal hyperplasia (IH). This negative effect is most pronounced in artificial grafts. Photodynamic therapy (PDT) is a technique in which light activates photosensitizer dyes to produce free-radicals resulting in an eradication of cells in ...
Kuji Tadashi - - 2007
BACKGROUND: The migration and proliferation of myofibroblasts are prominent features of myointimal hyperplasia associated with haemodialysis polytetrafluoroethylene (PTFE) grafts. Since C-reactive protein (CRP) possesses functional activities on vascular smooth muscle cells (SMCs), we examined the expression of this protein in PTFE grafts early in the course of myointimal hyperplasia development ...
Mikawa Katsuya - - 2007
We report a case of a 72-year-old man undergoing pancreatoduodenectomy, who had a history of coronary artery bypass graft surgery using the right gastroepiploic artery. We intraoperatively used the graft clamping test, which was assessed via electrocardiography and transesophageal echocardiography, to verify patency of the right gastroepiploic artery graft. Because ...
Imamaki Mizuho - - 2007
BACKGROUND AND AIM OF THE STUDY: Skeletonization of the internal thoracic artery (ITA) has several advantages: sequential bypass grafting can be easily performed, and a graft of increased length can make the distal coronary artery accessible. However, kinking of the grafts has been observed on postoperative angiograms in a few ...
Kakkos Stavros K - - 2007
The aim of the present study was to determine the effect of an aggressive graft surveillance and endovascular treatment protocol on secondary patency rates of a polyetherurethaneurea vascular access graft, specially designed to provide early access and rapid hemostasis. One hundred and ninety Vectra Vascular Access Grafts (C. R. Bard, ...
Adelani Muyibat A - - 2007
BACKGROUND AND OBJECTIVES: Limb salvage surgery combined with vascular reconstruction has replaced amputation as the preferred treatment of soft tissue sarcomas involving major vascular structures of the extremities. We describe our experience with soft tissue sarcomas involving major vascular structures and examine outcomes according to the type of graft selected ...
Andreini Daniele - - 2007
BACKGROUND: Multidetector computed tomography has been shown to be useful in the evaluation of coronary artery bypass grafts in previous studies. We studied the accuracy of multidetector computed tomography in the detection of patency and significant stenosis of both grafts and native postanastomotic coronary arteries. METHODS: Ninety-six patients with 216 ...
Marković Dragan M - - 2007
This retrospective study covers the period from 1991 to 2002, during which 3,623 patients were operated on because of aneurysmal or occlusive disease of aortoiliac and femoropopliteal segments. Among them, 87 patients (2.4%) developed a false anastomotic aneurysm in the 12-year follow-up period and were treated operatively. Most frequently, in ...
Kudo Fabio A FA Yale University School of Medicine, Department of Surgery, New Haven, CT 06519, - - 2007
Ephrin ligands and Eph receptors are signaling molecules that are differentially expressed on arteries and veins during development. We examined whether Eph-B4, a venous marker, and Ephrin-B2, an arterial marker, are regulated during vein graft adaptation in humans and aged rats. Eph-B4 transcripts and immunodetectable protein are downregulated in endothelial ...
Karthikeyan Ganesan - - 2008
Coronary artery segments proximal to the site of graft placement are prone to accelerated atherosclerosis. This has been generally (and somewhat simplistically) attributed to competitive flows between the graft and the native vessel. A more plausible mechanism, linking the rapid induction and progression of atherosclerosis to abnormal flow patterns, and ...
Eidt John F - - 2007
Unfavorable iliac anatomy, such as small caliber or circumferential calcification, can cause problems during delivery of aortic endografts and lead to potential complications. An iliac artery conduit "chimney" has been used to deliver the large caliber endoprosthesis using a Dacron graft sewn onto the iliac bifurcation. An all-autogenous revascularization option ...
Wang Xinwen - - 2007
INTRODUCTION: Cardiovascular disease, including coronary artery and peripheral vascular pathologies, is the leading cause of mortality in the United States and Western countries. There is a pressing need to develop small-diameter vascular vessels for bypass surgery and other vascular reconstructive procedures. Tissue engineering offers the prospect of being able to ...
Eifert S - - 2007
BACKGROUND: The main aim of our study was to compare the results and value of angiography and multi-slice computed tomography (MSCT) after coronary artery bypass grafting using complex arterial conduit combinations. METHODS: Twenty-six patients underwent coronary surgery. In all patients, we utilized a T-graft (free arterial graft centrally implanted into ...
Shrestha B M - - 2007
Early thrombosis of a polytetrafluoroethylene (PTFE) graft used for hemodialysis vascular access can result from technical error or hypotension and hypovolaemia in the immediate postoperative period. Massaging a graft to dislodge a freshly formed thrombus with a view to restoring blood flow can lead to acute limb ischaemia from embolisation ...
Schanzer Andres - - 2007
Iliac angioplasty in preparation for an infrainguinal bypass graft has been shown to be an effective strategy. We undertook this study to determine if superficial femoral artery (SFA) angioplasty offers durable inflow for distal origin grafts originating from the SFA or popliteal artery. All distal origin grafts performed at a ...
Staffa R - - 2007
AIM: In this study the long-term outcomes in patients undergoing pedal bypass grafting were evaluated and the risk of graft occlusion was related to whether, preoperatively, the pedal arteries were visualized by angiography or not and were only detected by duplex ultrasonography. METHODS: In 2000-2005, 81 pedal bypass grafts were ...
Liem Timothy K - - 2007
Mesenteric bypass grafts may be followed postoperatively with duplex scanning. It is unknown, however, if duplex-derived velocity measurements vary over time or if the type of procedure (antegrade vs retrograde) and the caliber of graft affect velocity measurements. The purpose of this study was to characterize duplex findings in mesenteric ...
Malvindi Pietro Giorgio - - 2007
A best evidence topic in cardiac surgery was written according to a structured protocol. The question addressed was to investigate the patency of the gastroepiploic artery when used for coronary artery bypass grafting. Altogether 304 papers were found using the reported search, of which 15 presented the best evidence to ...
Kreienberg Paul - - 2007
Patients after infrainguinal vein bypasses are a group at risk of graft stenosis and occlusion. Revision of failing grafts has been shown to significantly improve bypass patency and limb salvage. Options for surgical revision of mid bypass stenosis includes either patch angioplasty (PA) or interposition grafting (IG). We reviewed our ...
Sarkar Sandip - - 2007
The multiple demands placed on small calibre cardiovascular bypass grafts have meant that a synthetic prosthesis with good long-term patency has not been developed. A tissue-engineered graft could fulfil the ideal characteristics present in an artery. However, the great disadvantage of such a conduit is the time necessary for maturation ...
Takeuchi Koh - - 2007
Right ventricular outflow tract obstruction is a frequent condition after Rastelli operation. Although several modifications have been reported elsewhere, ideal conduit has not been developed yet during long-term follow-up. We reviewed our experiences over 15-year long-term follow-up with patients who underwent Rastelli operation using house-made equine pericardial roll graft. Since ...
Russo G - - 2007
AIM: In this study the ELANA Technique has been reproduced in our experimental laboratory in order to verify its feasibility and reproducibility, the percentage of patent anastomosis in acute at different steps along the learning curve of the surgical team, specific problems related to the surgical technique. METHODS: In 20 ...
Gabbieri Davide - - 2007
We report a 71-year old man with coronary artery disease. Complete coronary revascularization was not possible with autologous grafts; therefore, a 4-mm expanded polytetrafluoroethylene graft was implanted that had been seeded preoperatively with autologous vascular endothelial cells. At 9-year follow-up, the patient is asymptomatic and shows a patent graft.
Esaki Jiro - - 2007
BACKGROUND: Bilateral internal thoracic artery grafting in coronary artery bypass surgery has a better long-term outcome than single internal thoracic artery grafting. However, the efficacy of gastroepiploic artery (GEA) grafting in addition to bilateral internal thoracic artery grafting is still not well-established. METHODS: From 1989 to 1999, 311 patients underwent ...
Eckardt Rozy - - 2007
We sought to evaluate how often and in what way surgeons change peroperatively their preoperative coronary artery bypass grafting strategy and to what degree these changes affect postoperative graft patency. A series of 109 patients with stable angina pectoris and at least one occluded coronary artery participated. The surgeon filled ...
Desai Nimesh D - - 2007
BACKGROUND: The purpose of this investigation was to determine optimal patient and target-vessel characteristics to maximize arterial and venous graft patency on the basis of data from a large clinical trial. METHODS AND RESULTS: Angiographic data on 440 radial artery grafts and 440 saphenous vein grafts were analyzed with methodology ...
Anzai Tomohiro - - 2007
A 76-year-old man had undergone aneurysm exclusion and ascending abdominal aortic extraanatomical bypass for a thoracoabdominal aortic aneurysm in 1978. In 1983 hemoptysis occurred, and resection and closure of the central stump of the aorta and a left lower lobectomy were performed. Dilatation (phi50 mm) of a prosthetic graft (Cooley ...
Wallace Michael J - - 2007
PURPOSE: To investigate the experimental creation of a percutaneous arteriovenous graft via the renal vessels using a simplified technique and to report on its safety, complications, and 1-month follow-up. MATERIALS AND METHODS: Transrenal arteriovenous grafts were created from the renal artery to the renal vein in six swine. Using a ...
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