Search Results
Results 551 - 600 of 1025
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Mills N L - - 1995
Saphenous vein graft failure is one of the primary reasons for coronary artery bypass reoperation. The economic impact alone in this country is staggering in an era of intensive cost cutting. The fact that some vein grafts remain free of disease for years while the sibling vein develops extensive atherosclerosis ...
Chaux A - - 1995
Coronary saphenous vein grafts in human beings have a more limited long-term patency rate than internal thoracic artery grafts, primarily because of more rapid development of arteriosclerosis. The factors responsible for this increased susceptibility are not completely understood. To test the hypothesis that vein valves may influence this process, we ...
Canver C C - - 1995
The choice of graft conduit is crucial to the success of coronary artery bypass grafting (CABG) because the patency of a coronary conduit is closely associated with an uneventful postoperative course and a better long-term patient survival. The standard conduits used for CABG are the greater saphenous vein (GSV) and ...
Katsumata T - - 1995
Stenting seems to be a definitive procedure after failed balloon coronary angioplasty. This report describes a case of redo coronary bypass grafting and concomitant resection of enlarging false aneurysm of a saphenous vein graft that developed secondary to stenting for recurrent stenosis after serial percutaneous transluminal coronary angioplasty. It warns ...
Tong Y - - 1995
Duplex scanning was used to study recurrent varicose veins in 244 limbs with previous high ligation of the long saphenous vein. The recurrent varicose veins were classified into two types according to the presence or absence of a residual long saphenous vein. Varicose veins with a residual long saphenous vein ...
Cardenas J R - - 1995
Restenotic lesions at distal saphenous vein graft (SVG) anastomoses have been notoriously difficult to treat with standard angioplasty techniques. We explored the potential of rotational atherectomy in three patients with nonthrombotic, focal restenoses at the SVG touch down. The Rotablator safely and successfully recanalized the lesions, allowing further treatment with ...
Fox A D - - 1995
A 74-year-old male claudicant had undergone operative repair of his bilateral varicose veins 22 years earlier. His records confirmed that on the right side he had only had a saphenofemoral disconnection. Duplex scanning and angiography of his right leg demonstrated an occluded superficial femoral artery (SFA) and a network of ...
Kasabian A K - - 1995
Microvascular free flaps have been successfully used to cover defects of the lower extremity. In patients with peripheral vascular disease and lower extremity defects, revascularization with in situ or reversed saphenous vein bypass graft combined with microvascular tissue transfer can salvage a limb that would otherwise be amputated. However, some ...
Arnet U - - 1995
Nitrate tolerance is a clinical problem in patients with coronary artery disease and heart failure. Human internal mammary arteries and saphenous veins obtained intraoperatively were suspended in organ chambers, and isometric tension was measured. In the artery, nitroglycerin elicited a potent relaxation, which was significantly diminished after prolonged incubation with ...
Mehta S - - 1995
Recently occluded saphenous vein grafts (SVG) contain abundant thrombus. Distal embolization and myocardial infarction often occur when recanalization of such SVG is attempted. In 80 patients with occluded SVG, we employed transcatheter devices to lyse, compress or extract thrombus. Primary treatment for these SVG was performed in the following manner; ...
Kato N - - 1995
Four cases of saphenous vein graft donor site dermatitis are reported from Japan for the first time. The patients were four Japanese men aged from 57 to 69. They noted pruritic eruptions along the lower extremity scar after coronary artery bypass graft surgery using the autogenous saphenous vein. The eruptions ...
Wilson G J - - 1995
We have developed a multistep detergent-enzymatic extraction process (involving hypotonic and hypertonic solutions, the detergents octyl-phenoxy-polyethoxyethanol and sodium dodecyl sulfate, as well as DNAse and RNAse) which, while inhibiting autolysis, removes all cells from tissues and, with them, cellular antigens together with lipids and more soluble glycosaminoglycans. What remains is ...
Banz M - - 1995
AIMS: The advantages of in situ autologous vein grafts for long infrainguinal arterial reconstructions are the tapered conduit, minimising size mismatch at proximal and distal anastomoses, and the possibility of using small sized veins with good results. Unfortunately, in about 30% of legs the ipsilateral saphenous vein is inadequate rendering ...
Blankenship J C - - 1995
Lesions in distal coronary vasculature present unique problems for catheter-based interventions. We report two cases of attempted transluminal extraction catheter (TEC) atherectomy for very distal lesions in long circular saphenous vein grafts. One case succeeded with a simple modification of the TEC device; another failed because of excessive tortuosity in ...
Sales C M - - 1995
BACKGROUND: The patency of a saphenous vein graft is directly related to the quality of the vein harvested. Thus, appropriate evaluation of the vein before implanting it as a bypass graft may help identify those veins at high risk for early failure. Accordingly, we prospectively investigated whether prebypass angioscopic assessment ...
Stierli P - - 1995
In situ bypass grafting depends on an adequate ipsilateral greater saphenous vein. To profit from a tapered, valveless conduit in legs without an adequate greater saphenous vein, we routinely used the contralateral saphenous vein non reversed. In some reconstructions to the infrageniculate popliteal and the proximal anterior tibial artery we ...
Dardik H - - 1995
Some 20 years have elapsed since the initial concept and development of the human umbilical vein graft. Experience with 1074 umbilical vein grafts forms the basis of this report as the indications for this prosthesis have been refined and its performance defined. In 1988, the author and colleagues published their ...
Cornell K - - 1995
The vascular anatomy of the reverse saphenous conduit flap in cats was defined by contrast radiography of both hindlimbs of 18 feline cadaver specimens. In all 36 flaps, flow of contrast medium from the femoral artery to the distal end of the flap was documented. Direct anastomosis of the superficial ...
Melliere D - - 1995
The greater saphenous veins in patients with varicose veins has been overlooked as a conduit for arterial bypass. Greater saphenous veins is often normal and when only parts of the greater saphenous veins are of normal size, a veno-venous or a graft composite bypass may be performed. The goal of ...
Kimball B P - - 1995
To evaluate technical differences and angiographic response of saphenous vein bypass graft angioplasty in comparison to native coronary arteries, we retrospectively analyzed 54 patients undergoing this procedure at The Toronto Hospital between February 1988 and May 1993. These subjects were temporally matched to a cohort of successful native coronary angioplasties, ...
Sahouri S J - - 1995
Large aneurysms (> 4 cm) of saphenous vein grafts (SVG) to coronary arteries are a rare complication of coronary artery bypass graft surgery (CABG). A 64-year-old male, status post-CABG 14 years ago, presented with dyspnea and diaphoresis. Pneumonia and non-Q-wave myocardial infarction (MI) were diagnosed. Cardiac catheterization and chest computed ...
Chang B B - - 1995
The use of autogenous vein, whether in situ or excised, for arterial bypass procedures is well accepted. However, this usually requires the presence of a length of good-quality vein of adequate diameter. In patients lacking sufficient length of vein, two or more pieces of vein may be spliced together to ...
Heuser R R - - 1995
PURPOSE: Aneurysms develop only rarely in aortocoronary saphenous vein grafts (SVGs), and the usual treatment is surgical replacement of the diseased segment. However, in patients at appreciable risk for redo surgery, alternative therapies are desirable. We report the first compassionate use of a percutaneously delivered endoluminal graft (ELG) for internal ...
Kinjo O - - 1995
To design a more rational and effective surgical method of performing lymphatic-venous anastomosis to treat secondary lymphedema of the lower extremities, the following experiments were conducted on three groups of dogs: group A underwent an end-to-side lymphatic node-to-vein anastomosis at the inferior vena cava; group B underwent a "burying" lymphatic ...
Kubik S - - 1995
The relationships between lymph vessels and veins are of clinical importance for the prevention of injury to collectors and resulting edema after removal of veins. Injection preparations of the lymph vessels and veins showed that on the dorsum of the foot the collectors overcross the veins; however, in all remaining ...
Marquezini M V - - 1995
Glycosaminoglycan composition of normal saphenous veins and atherosclerotic saphenous vein grafts is reported. Dermatan sulfate is the main glycosaminoglycan present in both normal saphenous veins and saphenous vein grafts. These tissues also contain chondroitin sulfate and heparan sulfate. Although the total amount of glycosaminoglycans decreased in the grafts (compared with ...
Lengua F - - 1995
Between February 1983 and June 1994 we attempted surgically to salvage twenty-six legs in twenty-five patients with insufficient distal run-off and severely ischemic feet; all of them had resting pain, and 23 had tissue necrosis. A saphenous venous graft was interposed between an artery of the lower extremity (femoral or ...
Tsui S S - - 1995
There is increasing evidence that the use of arterial conduits for coronary artery bypass grafting provides superior long-term results when compared to using saphenous veins alone. Major complications of using internal thoracic arteries (ITAs) and inferior epigastric arteries (IEAs) are uncommon. We report the case of a 42-year-old man who ...
Head H D - - 1995
High-resolution, real-time ultrasonographic imaging of the greater saphenous veins was performed preoperatively in 100 patients undergoing coronary artery bypass grafting. Vein diameters were measured by ultrasound at four locations in the leg, and the course of the vein in the leg was marked on the overlying skin. Veins removed at ...
Yamada T - - 1995
The present study was undertaken to investigate histological changes in aortocoronary saphenous vein grafts (SVGs) and the relationship between intimal thickening of the SVGs and the interval after grafting. The SVGs were divided into five groups according to the degree of intimal thickening and associated luminal narrowing: minimal thickening (0%-10% ...
Korb H - - 1994
Cryopreserved venous segments could be used as allografts in coronary by-pass surgery in patients with limited availability of venous or arterial conduits for autologous grafting. After primarily disappointing clinical results it was the aim of these experiments to improve freezing procedure and incubation media in order to maintain most of ...
Labropoulos N - - 1994
The aim of this study was to assess the distribution and extent of valvular incompetence in patients with reflux confined to the superficial venous system and correlate the extent of such reflux with clinical symptoms and signs. Two hundred fifty-five limbs of 217 patients with superficial venous insufficiency and normal ...
Lee R T RT Department of Medicine, Brigham and Women's Hospital, Harvard Medical School, Boston, - - 1994
Our aim was to test the hypothesis that maximal stresses in saphenous vein atherosclerotic stenoses are greater than those in native coronary artery stenoses. The patency of coronary artery saphenous vein bypass grafts decreases with time, usually because of thrombosis. Plaque rupture has been described as one mechanism of vein ...
Annex B H - - 1994
The TEC is a forward-cutting atherectomy catheter that has the unique potential to excise and aspirate atheroma, especially intraluminal thrombus. This device has been under clinical investigation for more than 6 years and received final marketing approval by the FDA for the treatment of lesions in the coronary vasculature in ...
Schanzer H - - 1994
Surgical treatment of varicose veins with preservation of the greater saphenous vein (GSV) was studied. Patients with reflux at the saphenofemoral junction and grossly normal GSV were treated with two different surgical techniques: perivalvular banding valvuloplasty (PVBV-A) of the saphenous valve, wherein the diameter of the uppermost saphenous valve was ...
Bryan A J - - 1994
Saphenous vein graft failure remains a significant clinical and economic burden. Although increased use of arterial conduits has improved long-term outcome, the majority of bypass procedures continue to use saphenous vein. Early vein graft patency is maximized by avoiding damage at the time of implantation, meticulous surgical technique, and appropriate ...
Flynn M S - - 1994
Coronary revascularization using balloon angioplasty and stent placement for unstable angina was performed in a 74-year-old woman with an aorto-ostial occlusion of a "Y-type" saphenous vein graft and a severe stenosis in the body of a 14-year-old left anterior descending saphenous vein graft. Multiple prior coronary bypass graft surgeries, location ...
Alexander J J - - 1994
Nonanastomotic aneurysm formation in autogenous vein grafts, although rarely described, has been uniformly associated with advanced atherosclerotic change of the vein wall. In the case reported, histologic examination of an in situ vein graft aneurysm demonstrates obliteration of normal vessel wall architecture by penetrating atherosclerotic plaque. Although these findings do ...
Londrey G L - - 1994
The purpose of this study was to evaluate the results of infrainguinal reconstructions with arm vein, lesser saphenous vein, and remnants of greater saphenous vein (ectopic vein grafts). The records of 222 patients who underwent 257 bypasses were restrospectively reviewed. Most of the grafts were placed for rest pain or ...
Kast A - - 1994
Among 184 rhesus and cynomolgus monkeys treated daily for 28 consecutive days by injection into cephalic or saphenous veins, 14 animals (7.6%) had pulmonary emboli with fragments of skin or hair in arterial thrombi or in giant cell granulomas. 167 monkeys (91%) showed lesions at the site of injection, predominantly ...
Gandhi R H - - 1994
Lower-extremity ischemia can lead to impaired healing of saphenous vein excision sites in patients with significant peripheral vascular disease (PVD). Five patients who required infrainguinal revascularization for wound necrosis of the harvest site after coronary artery bypass grafting are described. The male/female ratio was 2:3 with a mean age of ...
Davies A H - - 1994
The ability of vein to dilate may allow smaller veins to be used for bypass if this change could be predicted. Sixty patients undergoing femorodistal popliteal or infrapopliteal bypass have had their long saphenous vein studied. Diameter measurements of the long saphenous vein have been performed using an ATL Duplex ...
Hong M K - - 1994
Standard balloon angioplasty of degenerated saphenous vein graft lesions may be complicated by distal embolization, particularly in the presence of intragraft thrombus. Transluminal extraction atherectomy may be useful in this setting because of its ability to remove particulate debris. This study was designed to identify the incidence and prognostic significance ...
Fillinger M F - - 1994
Although arteries appear to remodel in response to changes in hemodynamic parameters such as shear stress, little is known about functioning human vein grafts. This study was designed to explore diameter changes in human saphenous vein grafts after infrainguinal bypass. We used duplex ultrasonography to measure hemodynamic variables that might ...
Clair D G - - 1994
A study was conducted to test the hypothesis that angioscopically assisted valve lysis and vein branch identification during in situ saphenous vein bypass would reduce technical causes of graft failure, local operative morbidity, and hospital stay. Patients requiring primary bypass to an infrageniculate artery were randomly assigned to undergo in ...
Sala A - - 1994
Segments of human saphenous vein, internal mammary artery, right gastroepiploic artery, and inferior epigastric artery were incubated in vitro in Krebs-Henseleit solution and compared in terms of their capacity to generate and release into the medium 6-keto-prostaglandin F1 alpha (PGF1 alpha), the stable metabolite of prostacyclin. The four vascular conduits ...
Johnson P R - - 1994
Despite several million coronary artery bypass grafting procedures, aneurysms and pseudoaneurysms of saphenous vein coronary artery bypass grafts (SVCABG) have been presumed to be rare; this assumption is based on the paucity of case reports in the literature. We present a case report of a SVCABG aneurysm demonstrated by electron ...
Cross K S - - 1994
Vasoreactivity of 11 coronary artery vein bypass grafts and 13 human saphenous veins was examined. Isometric tension studies were performed in response to potassium chloride (110 mmol/l), noradrenaline (10(-9)-10(-4) mol/l), serotonin (10(-9)-10(-4) mol/l) and histamine (10(-8)-10(-2) mol/l). After precontraction with noradrenaline (10(-5) mol/l), the response to acetylcholine (10(-8)-10(-4) mol/l) and ...
Calleja F - - 1994
A 60-year-old man with a painful pulsatile mass approximately 8 cm in diameter in the right buttock was diagnosed using angiography as having a complete unilateral persistent sciatic artery aneurysm. The lesion was obliterated by proximal and distal ligation of the sciatic artery at the pelvis and the adductor magnus ...
Rajah S M - - 1994
Saphenous vein coronary artery bypass graft patency can be increased by antiplatelet therapy. Aspirin plus dipyridamole are effective but are associated with tolerability problems. Indobufen is a possible alternative antiplatelet agent that may be better tolerated. A prospective, randomized, double-blind, parallel-group study was undertaken to compare the efficacy and safety ...
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