Search Results
Results 601 - 650 of 1368
< 8 9 10 11 12 13 14 15 16 17 18 >
Valéro F - - 1998
Restenosis remains the major limitation of coronary angioplasty. The objective of this study was to develop microspheres able to be delivered at the angioplasty site for long-term drug release and to test their effects in a model of balloon angioplasty. Polylactic-co-glycolide acid microspheres (5-10 microm in diameter) were prepared by ...
Gaxiola E - - 1998
An 82-year-old woman undergoing percutaneous transluminal coronary angioplasty experienced perforation of the terminal portion of the left anterior descending coronary artery caused by guidewire trauma. The coronary artery perforation was successfully closed using a vascular occlusion system consisting of individual thrombogenic coils delivered to the site. Coronary artery perforation (CAP) ...
Kim R H - - 1998
Percutaneous intervention in patients with intracoronary thrombus continues to pose a significant clinical challenge. In this report, we describe the successful treatment of a 44-year-old patient with an extensive chronic thrombotic occlusion of the right coronary artery using a rheolytic thrombectomy catheter. Despite angiographic documentation of coronary thrombosis 104 days ...
Nakano S - - 1998
PURPOSE: We review our initial experience with direct percutaneous transluminal angioplasty (PTA) as a reperfusion treatment for acute occlusion of the middle cerebral artery. METHODS: Ten patients in whom successful thrombolysis might not be expected because of the risk of hemorrhagic complications or reocclusion were treated with direct PTA. When ...
Sawada M - - 1998
A total of 34 stenotic lesions of the vertebral or subclavian artery were treated in 29 patients using percutaneous transluminal angioplasty (PTA). Seventeen patients were followed angiographically for up to 2 years after PTA. Of 17 patients, five (29.4%) had restenosis which developed between 3 and 6 months after the ...
Tang S - - 1998
The stenosis and subsequent thrombosis of the arteriovenous fistulae may lead to a loss of vascular access sites; this a major problem in chronic haemodialysis patients. Percutaneous transluminal angioplasty has been a popular way of correcting such lesions in recent years. We have reviewed patients who underwent this operation from ...
Saito S - - 1998
ST-segment alternans has been described in experimental coronary artery occlusion and in patients with variant angina. It is also seen during coronary angioplasty. This report describes a patient who on balloon inflation during coronary angioplasty demonstrated ST-segment alternans only on intracoronary electrocardiogram but did not on surface 12 lead electrocardiogram. ...
Formichi M - - 1998
PURPOSE: To report the emergent endovascular management of an external iliac artery (EIA) rupture after standard guidewire recanalization and balloon angioplasty. METHOD AND RESULTS: A 54-year-old diabetic male presented with an occlusion of the EIA associated with severe stenotic lesions of the femoral bifurcation. Guidewire recanalization of the lumen was ...
Dregelid E - - 1998
During performance of embolectomy or thrombectomy one often encounters arterial stenoses. These may be treated by adjunctive intraoperative angioplasty during the operation or delayed percutaneous angioplasty (PTA) may be performed in the interventional radiology department. Delayed PTA may have to wait until the wound has healed, and during this time ...
Feldman T E - - 1998
Continued progression of atherosclerosis after coronary artery bypass grafting (CABG) can cause renewed symptoms in patients who are older, often sicker, and have a higher risk for complications from surgery or angioplasty than those with de novo disease. Devices that ablate atheroma and stents that maintain patency of treated arteries ...
Brosh David - - 1998
The use of therapeutic ultrasound to treat atherosclerosis and thrombosis has been appreciated for decades. However, it was only the explosive growth of angioplasty in the 1980s that brought real momentum to the development of therapeutic catheter ultrasound. The idea behind this technique was that ultrasound, by its bioselectivity, might ...
Murakami R - - 1998
PURPOSE: To evaluate the initial and long-term results of percutaneous transluminal angioplasty (PTA) for totally occluded iliac arteries. METHODS: Fifty-four occluded iliac arteries in 54 patients were treated by PTA. The mean length of the occlusions was 8.0 cm (range 0.5-24.0 cm). Patients were followed for a maximum of 124 ...
Schwarzenberg H - - 1998
In a 74-year-old woman, a Dacron-covered Cragg endoprosthesis was implanted into the left superficial femoral artery after successful recanalization of a 6-cm-long occlusion. At 4.5 months after discharge the endoprosthesis was occluded. In order to perform a thrombectomy, an Amplatz thrombectomy device (ATD) was activated and advanced into the occluded ...
Sugimura T - - 1997
BACKGROUND: About 4% of children with Kawasaki disease (KD) eventually develop ischemic heart disease, which is often associated with calcified stenosis. We assessed the utility of the percutaneous transluminal coronary rotational ablation (PTCRA) in children with coronary artery stenosis after KD. METHODS AND RESULTS: Four children (three boys and one ...
Denbow C E - - 1997
This is the first detailed report from the Anglophone Caribbean of percutaneous transluminal coronary angioplasty (PTCA). The procedure resulted in complete dilatation of the occluded vessels in the five patients in whom it was undertaken, with significant improvement in exercise duration in the Bruce protocol (p < 0.001; 95% CI ...
Pyles J M - - 1997
Vascular restenosis involves contraction, proliferation, and remodeling of the arterial wall in response to overstretch injury. Mitogen-activated protein kinases (MAPKs) are implicated in both contraction and proliferation of vascular smooth muscle (VSM), and studies of porcine carotid arterial muscle strips have shown that mechanical stretch leads to the activation of ...
Izzat M B MB Division of Cardiothoracic Surgery, The Chinese University of Hong Kong, Shatin. - - 1997
Minimally invasive direct coronary artery bypass (MIDCAB) using the left internal mammary artery (IMA) to the left anterior descending (LAD) coronary artery can be performed with low operative risk. MIDCAB can be combined with percutaneous transluminal coronary angioplasty (PTCA) to treat patients with multivessel disease. We report here our experience ...
Yokote H H Department of Neurological Surgery, Wakayama Medical College; Wakayama City, - - 1997
Recent developments of the interventional neuroradiological technique made percutaneous transluminal angioplasty (PTA) possible even for intracranial arteries(1). We report our experiences of 17 cases treated by PTA including 9 intracranial internal carotid (ICA), 4 middle cerebral (MCA) and 4 vertebro-basilar arterial (VBA) stenoses and discuss the problems of the procedure. ...
Kurashima A A Department of Neurosurgery, Nagano Red Cross Hospital; Nagano City, - - 1997
We performed emergency percutaneous transluminal angioplasty (PTA) with a perfusion balloon catheter (PBC) for PTCA and, at the same time, thrombolytic therapy was administered by urokinase (UK) perfusion in five cases of severe cervical internal carotid artery stenosis in which sudden cerebral hemisphere ischemia occurred due to acute thrombotic obliteration. ...
Masuo O O Department of Neurological Surgery, Hidaka General Hospital; Wakayama, - - 1997
We performed Percutaneous Transluminal Angioplasty (PTA) in 50 patients with internal carotid artery (ICA) stenosis. Fifteen of these patients also showed signs of contralateral ICA occlusive lesions. Various neurological symptoms, such as hemiparesis or convulsions, frequently appeared in these patients with contralateral lesions during PTA. The balloon inflation time was ...
Terada T T Department of Neurological Surgery, Wakayama Medical College; Wakayama City, - - 1997
Three patients with tandem internal carotid stenoses were treated in one operation including carotid endarterectomy (CEA) for the proximal stenosis and percutaneous transluminal angioplasty (PTA) for the distal stenosis. We devised a Y-shaped shunt tube which we used for CEA, while a PTA balloon catheter was introduced via the tube ...
Nishi S S Dept. of Neurosurgery, National Cardio-Vascular Center Hospital; Osaka, - - 1997
There are various methods for measuring an affected vascular size during embolization or percutaneous transluminal angioplasty (PTA). Metallic balls, electrodes, grids, coins on the skin were simple and useful in this sense, but not stable and exact for measuring. A 0.014" or 0.016" microguide wire with 5 gold markers in ...
Chemla E - - 1997
The major complication of vascular recanalization is intimal hyperplasia which is due mainly to proliferation and migration of smooth muscle cells (SMC). Activation of SMC results from stimulation of protooncogens (c-myb, c-myc, c-fos) by growth factors induced by activated ras-proteins. Ras-proteins become activated after receiving a farnesyl group in a ...
Lee J S - - 1997
An econometric model is presented to compare the cost-effectiveness of two alternative procedures, percutaneous transluminal coronary angioplasty (PTCA) and coronary artery bypass surgery (CABG), for the treatment of multivessel coronary artery disease. This study utilizes the MIMIC (multiple indicator multiple cause) health model in a simultaneous equation system to analyse ...
Mitchel J F - - 1997
Nineteen pigs were studied in order to assess the effect of low grade, radiofrequency-powered, thermal balloon angioplasty on the vasoconstrictor response of peripheral arteries. A mechanical stimulus was used to induce vasospasm. Thermal angioplasty reduced the extent of inducible vasospasm from 79% to 6% compared to nonthermal control inflations, which ...
Joseph G - - 1997
Transfemoral balloon angioplasty of native aortic coarctation was initially not feasible in two patients, because of inability to cannulate the femoral artery percutaneously in one, and to cross the coarctation in the other. The percutaneous brachial approach helped overcome both these problems, after which utilization of intravascular snares allowed successful ...
Takis C - - 1997
PURPOSE: To review our experience with intracranial angioplasty, including the complications we encountered. METHODS: During a 3-year period, from 1993 to 1996, 10 patients had intracranial percutaneous transluminal angioplasty (PTA). The stenosed vessels included three internal carotid arteries, one middle cerebral artery, one basilar artery, and five vertebral arteries. Stenosis ...
Allemann Y - - 1997
The experience in consecutive procedures with 800 recanalization attempts of chronic total coronary occlusions using the Magnum wire was analyzed from a prospectively constituted computerized database. The data confirm that the Magnum wire, generally used as a primary intervention for occlusive angioplasty at our centers, is competitive with conventional systems ...
Simmons P L - - 1997
We report a case of a 4-year-old boy with tetralogy of Fallot, pulmonary atresia, and hypoplastic pulmonary arteries who presented with mild hemoptysis and upper respiratory infection 3 weeks following percutaneous transluminal angioplasty for pulmonary artery stenosis. While pneumonia was initially suggested on early plain radiographs of the chest, a ...
Sawada M - - 1997
OBJECTIVE: Percutaneous transluminal angioplasty (PTA) is accepted as a safe and effective procedure for the treatment of stenotic arterial lesions of various sites. However, distal embolism may cause serious complications in the PTA of cephalic arteries. By monitoring embolic signals using transcranial Doppler (TCD) ultrasonography, we speculated regarding the safety ...
Shah A - - 1997
Lead distributions of peak ST-segment depression were compared between patients undergoing left circumflex artery percutaneous transluminal coronary angioplasty and exercise tolerance test. Localization of peak ST-segment depression to leads V2 or V3 was 96% specific and 70% sensitive for differentiating ischemia due to occlusion of left circumflex artery occlusion from ...
Peek G J - - 1997
Absorbable pulmonary artery banding may be a useful method of avoiding further operation or angioplasty in patients whose underlying lesion has a natural history of resolution. We report 2 cases of absorbable pulmonary artery banding using braided Dexon. In both cases the bands functioned well initially and were completely resorbed ...
Brener S J - - 1997
OBJECTIVES: It is not known whether the results of randomized trials comparing coronary artery bypass grafting to percutaneous transluminal coronary angioplasty for initial revascularization apply to repeat revascularization in patients with prior bypass grafts. We studied the differences between the patients with prior bypass grafts referred for surgery or angioplasty ...
Wallace R C - - 1997
We describe the use of abciximab to prevent rethrombosis of the basilar artery after transluminal angioplasty. A 60-year-old patient with vertebral basilar insufficiency and acute occlusion of the basilar artery underwent revascularization with urokinase and angioplasty. Despite the repeated use of urokinase and angioplasty under anticoagulation with heparin, the basilar ...
Steg P G - - 1997
BACKGROUND: Gene delivery of the thymidine kinase (tk) gene combined with ganciclovir (GCV) limits intimal hyperplasia after abrasion of normal arteries. However, the low efficiency of adenoviral-mediated gene transfer to atherosclerotic arteries has raised concerns about the applicability of this strategy to the prevention of restenosis. METHODS AND RESULTS: A ...
Volk E E - - 1997
Percutaneous transluminal angioplasty is a technique widely used to treat stenotic atherosclerotic lesions of the coronary arteries. This technique is currently gaining acceptance for the treatment of cerebral atherosclerotic disease. Autopsy findings of fatal complications of percutaneous transluminal angioplasty of the posterior cerebral circulation have, to our knowledge, not yet ...
Maeshima S - - 1997
A 66-year-old man with a history of previous transient ischemic attacks had progressive memory and gait disturbance caused by severe stenoses of both the internal carotid arteries and vertebral arteries. The patient underwent percutaneous transluminal angioplasty of the vertebral arteries and endarterectomy of the internal carotid arteries with satisfactory results. ...
Shiraishi S - - 1997
The case of a 65-year-old man who developed a coronary artery aneurysm at the site of percutaneous transluminal coronary angioplasty (PTCA) in the proximal right coronary artery (RCA) is described. The coronary artery aneurysm was resected and a coronary artery bypass to the distal RCA was grafted to avert thromboembolism.
Kern M J - - 1997
OBJECTIVES: This study sought to examine the mechanism of increasing coronary flow reserve after balloon angioplasty and stenting. BACKGROUND: Coronary vasodilatory reserve (CVR) does not improve after percutaneous transluminal coronary angioplasty in > or = 50% of patients, postulated to be due to impaired microvascular circulation or inadequate lumen expansion ...
Taniguchi M - - 1997
It is believed that directional coronary atherectomy (DCA) is more suitable than percutaneous transluminal coronary angioplasty for lesions such as severe eccentric lesions, ostial lesions, and branch lesions. However, it remains a fact that lesions that are also highly calcified are often suboptimal, since there may be difficulties such as ...
Chae J K - - 1997
We report a case of successful treatment of coronary artery perforation and cardiac tamponade with an autologous vein graft-coated stent, which were developed during percutaneous transluminal coronary angioplasty. The method reported here may be an effective alternative to emergency surgery and should be considered when coronary artery perforation does not ...
Crilley J G - - 1997
Angiography in a 37 year old female with a three week history of typical crescendo angina found an 80% stenosis of the proximal left anterior descending (LAD) artery. The patient underwent percutaneous transluminal coronary angioplasty involving TEC artherectomy of the LAD artery. The specimen removed by atherectomy was found to ...
De Leon H - - 1997
Nonmuscle myosin heavy chain-B isoform (NMMHC-B) is expressed by proliferating vascular smooth muscle cells (SMCs), and its expression in primary lesions has been proposed to be predictive of restenosis after atherectomy. The present study was designed to study the time-course expression of NMMHC-B after angioplasty of porcine coronary arteries by ...
Takahashi M - - 1997
To assess the relationship between coronary artery calcification and the late success rate of percutaneous transluminal coronary angioplasty (PTCA), we performed electron beam computed tomography (EBCT) in 22 patients with ischemic heart disease who underwent PTCA. The calcification score in each coronary artery vessel was estimated and compared with the ...
Maeda M - - 1997
The results of clinical observation of 35 patients with aortitis syndrome (AS) in childhood, obtained by a nationwide survey in Japan, are reported. The male to female ratio was 1:2.5, the estimated age of onset averaged 10.2 years, and the duration from the estimated age of onset to the diagnosis ...
Saliou C - - 1997
We describe a case of radiation injury to the superficial femoral and upper popliteal arteries in a 39-year-old man treated 13 years earlier for an osteosarcoma of the right femur. Following two failed attempts at transluminal angioplasty, a saphenous vein femoropopliteal bypass graft was performed successfully. A comprehensive review of ...
Babatasi G - - 1997
OBJECTIVE: As the mortality associated with coronary artery bypass grafts has fallen, morbidity has become an increasing problem. The improvement of transluminal carotid angioplasty is enlarged to patients with asymptomatic severe carotid stenosis (> 85%) requiring coronary surgery. METHODS: Between January 1993 and January 1995, 10 patients underwent percutaneous carotid ...
Batt M - - 1997
Buttock claudication is usually caused by proximal arterial obstruction in the aorta or the common iliac artery. We report an unusual case of buttock claudication caused by isolated stenosis of the superior gluteal artery diagnosed by angiography. Both physical examination and noninvasive vascular explorations had been unremarkable. Twenty-six months after ...
Stella P R - - 1997
Coronary angioplasty with 6F guiding catheters via the radial artery is associated with a minimal risk for major entry site-related complications. Although the incidence of radial artery occlusion (RAO) in the literature is approximately 30% after prolonged cannulations, little is known about the incidence and its clinical consequences of RAO ...
Kim C B - - 1997
Laser transmyocardial revascularization (TMR) creates conduits from the left ventricular cavity into the myocardium and has been forwarded as a potential method of perfusing ischemic myocardium. The procedure typically employs a CO2 laser to produce transmyocardial channels from the epicardial to the endocardial surface via an open thoracotomy. Preliminary studies ...
< 8 9 10 11 12 13 14 15 16 17 18 >