1,720,981 research outputs found
Percutaneous transluminal coronary angioplasty hardware entrapment: guidewire entrapment
No full textEntrapment and fracture of coronary angioplasty hardware are rare complications of percutaneous coronary interventions for which cardiac surgery is sometimes required. We report a case of guidewire entrapment during stenting of the left anterior descending coronary artery (LAD) that required surgical removal. Although a piece of guidewire remained entrapped inside the stent, in the proximal tract of the LAD, a single bypass using the left mammary artery was performed. No perioperative complications were observed. There were no signs of perioperative or postoperative myocardial infarction, as indicated by clinical biomarkers or by electrocardiographic changes. The patient had an uneventful recovery and was discharged from the hospital on the sixth postoperative day. J Cardiovasc Med 9:1140-1141 (C) 2008 Italian Federation of Cardiology
How to ensure a good flow to the arm during direct axillary artery cannulation
No full textWe herein describe a simple and safe technique to avoid compartment syndrome/arm ischemia during direct right axillary artery cannulation, especially in patients who require long-term extracorporeal membrane oxygenation support. (C) 2010 European Association for Cardio-Thoracic Surgery. Published by Elsevier B.V. All rights reserved
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
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
Disfunção aguda devido a uma trombose da prótese da válvula mitral mecânica Acute dysfunction from thrombosis of a mechanical mitral valve prosthesis
No full textUm homem de 64 anos recebeu uma prótese mecânica CarboMedics de 31 mm para refluxo mitral grave. Após quatro dias, o paciente apresentou-se com fadiga e dispnéia em repouso. Estudos do Doppler ecocardiografia transtorácica e transesofágica confirmaram uma disfunção na mobilidade do folheto da válvula protética devido à trombose e uma operação de emergência foi feita. O pós-operatório transcorreu sem intercorrências. Este é um caso incomum de disfunção grave devido à trombose de uma prótese mitral mecânica em um paciente tomando anticoagulantes orais e calciparinaAn 64-year-old man received a 31-mm CarboMedics mechanical prosthesis for severe mitral regurgitation. After four days the patient presented fatigue and dyspnoea with rest; transthoracic and transesophageal Doppler echocardiographic study confirmed a failing mobility of prosthetic valve leaflet from thrombosis and an emergency operation was done. The postoperative course was uneventful. This is an unusual case of acute dysfunction from thrombosis of a mechanical mitral valve prosthesis in a patient on oral anticoagulant therapy and calciheparin
Dispelling the Myths Behind First-author Citation Counts
Full text linkWe conducted a full-scale evaluative citation analysis study of scholars in the XML research field to explore just how different from each other author rankings resulting from different citation counting methods actually are, and to demonstrate the capability of emerging data and tools on the Web in supporting more realistic citation counting methods. Our results contest some common arguments for the continued
use of first-author citation counts in the evaluation of scholars, such as high correlations between author rankings by first-author citation counts and other citation
counting methods, and high costs of using more realistic citation counting methods that are not well-supported by the ISI databases. It is argued that increasingly available digital full text research papers make it possible for citation analysis studies to go beyond what the ISI databases have directly supported and to employ more
sophisticated methods
Intraoperative veno-arterial hemofiltration during miniaturized extracorporeal bypass
No full textWe report the case of a 71-year-old man with creatinine clearance of 41 mL/min and acute anterior ST-segment elevation who underwent urgent coronary artery bypass grafting. A continuous intraoperative veno-arterial hemofiltration with high volumes of exchange (35 mL/kg/h) was used in a series for a miniaturized extracorporeal bypass system to minimize the inflammatory response and to protect the kidneys of this patient who had preoperative renal dysfunction. The patient had an uneventful postoperative recovery
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