1,720,970 research outputs found
Long-term outcome of percutaneous exclusion of huge saphenous vein graft aneurysms using peripheral covered-stents as alternative to surgical repair
No full textGiant vein graft aneurysms occur infrequently after coronary artery bypass graft surgery and are most often detected incidentally during coronary angiography for suspected angina or as a mediastinal mass on chest radiographs. Hereby, we describe the percutaneous treatment of a huge right coronary artery saphenous vein bypass graft aneurysm by using peripheral stent-graft. Twelve months after the procedure, the aneurysm was completely sealed at computed tomographic angiography with a good distal run-off in the bypass graft. Different strategies adopted and the feasibility as well as the long-term outcomes of this technique are described thoroughly
The cardiva catalyst II device: A catalyzer of patient safety or a boomerang for the endovascular specialist?
No full textIncidence, predictors and management of restenosis after percutaneous revascularization for left main coronary disease
No full textComprehensive multidisciplinary patient assessment and selection before TAVI procedure
No full textAortic stenosis is a common disorder that affects nearly 5% of persons >75 years of age. Aortic valve replacement is indicated for symptomatic patients with severe aortic stenosis, as the prognosis of untreated patients is poor. Nevertheless, many patients with symptomatic severe aortic stenosis do not undergo surgical valve replacement, which has been attributed to comorbidities. Transcatheter aortic valve implantation (TAVI) is a novel method to treat selected high-risk patients with aortic stenosis. Patient screening and anatomic measurements of the aortic root are of great importance to ensure procedural success and appropriate patient selection. This review outlines comprehensive multidisciplinary assessment and selection of these patients and the evolving role of the echocardiogram and the multislice computed tomography in support of TAVI program
Pioneer re-entry device for iliac chronic total occlusion: truly a paradigm shift
No full textThe number of percutaneous revascularization procedures performed for symptomatic peripheral arterial disease has significantly increased over the past several years. Traditionally, the use of percutaneous techniques were limited to certain anatomic subsets, such as stenosis or focal occlusions, with surgical treatment preferred for more extensive disease. More recently, endovascular specialists are facing the challenge of peripheral chronic total occlusions. Furthermore, unlike the coronary circulation, these occlusions are often very long and associated with other features of complexity such as severe calcifications. One of the primary issues concerning these lesions is the ability to safely achieve initial angiographic success. This article focus indeed on the Pioneer catheter, a new lumen re-entry device exploiting intravascular ultrasound imaging that was used in a case of totally occluded left common iliac artery with favorable results. The details of this technique, and how this catheter helped in re-entering the true lumen at the aortic bifurcation after subintimal dissection, are thoroughly discussed
Going Beyond Counting First Authors in Author Co-citation Analysis
Full text linkThe present study examines one of the fundamental aspects of author co-citation analysis (ACA) - the way co-citation
counts are defined. Co-citation counting provides the data on which all subsequent statistical analyses and mappings
are based, and we compare ACA results based on two different types of co-citation counting - the traditional type that
only counts the first one among a cited work's authors on the one hand and a non-traditional type that takes into
account the first 5 authors of a cited work on the other hand. Results indicate that the picture produced through this non-traditional author co-citation counting contains more coherent author groups and is therefore considerably clearer. However, this picture represents fewer specialties in the research field being studied than that produced through the traditional first-author co-citation counting when the same number of top-ranked authors is selected and analyzed. Reasons for these effects are discussed
Variations on the Author
Full text link“Variations on the Author” discusses two of Eduardo Coutinho’s recent films (Um Dia na Vida, from 2010, and Últimas Conversas, posthumously released in 2015) and their contribution to the general question of documentary authorship. The director’s filmography is characterized by a consistent yet self-effacing form of authorial self-inscription: Coutinho often features as an interviewer that rather than express opinions propels discourses; an interviewer that is good at listening. This mode of self-inscription characterizes him as an author who is not expressive but who is nonetheless markedly present on the screen. In Um Dia na Vida, however, Coutinho is completely absent form the image, while Últimas Conversas, on the contrary, includes a confessional prologue that moves the director from the margins to the center of his films. This article examines the ways in which these works stand out in the filmography of a director who offers new insights into the notion of cinematic authorship
Renal artery side branches patency protection during endovascular exclusion of giant renal artery aneurysm with covered stent: Well done is better than well said
No full textRationale: Endovascular treatment of renal artery aneurysms has offered a viable alternative with a high success rate and low procedure-related morbidity and mortality.
Patient concerns: A 60-year-old man, having a right renal artery aneurysm involving the main vessel with two arteries (supplying the inferior and superior lobes of the kidney) originating from the aneurysm sac as well.
Interventions: A 6 × 28 mm covered stent was inflated in vitro and a side hole was made with a femoral needle in the polytetrafluoroethylene (PTFE) layer, through which a wire was placed in an outside/inside direction in to be inserted in the inferior pole branch. The other wire was inserted inside the main lumen of the stent (to be inserted in the main artery) and the latter, carefully re-crimped on the balloon. This way, the authors guaranteed continuous access to both arteries during aneurysm exclusion and if needed, a second stent could be advanced at the level of the bifurcation to preserve side branch patency.
Conclusion: Perforating the PTFE of the stent before its introduction into the vessel and keeping a wire into the side branch could be a good strategy to protect any vessel arising from aneurysmal sac that needs to be excluded
Appropriate Similarity Measures for Author Cocitation Analysis
Full text linkWe provide a number of new insights into the methodological discussion about author cocitation analysis. We first argue that the use of the Pearson correlation for measuring the similarity between authors’ cocitation profiles is not very satisfactory. We then discuss what kind of similarity measures may be used as an alternative to the Pearson correlation. We consider three similarity measures in particular. One is the well-known cosine. The other two similarity measures have not been used before in the bibliometric literature. Finally, we show by means of an example that our findings have a high practical relevance.information science;Pearson correlation;cosine;similarity measure;author cocitation analysis
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