1,721,000 research outputs found
Aplicaciones contemporáneas de la fisiología coronaria en distintos escenarios clínicos
Get PDFTesis inédita de la Universidad Complutense de Madrid, Facultad de Medicina, Departamento de Medicina, leída el 12/02/2021. Tesis formato europeo (compendio de artículos)Aunque la angiografía coronaria es considerada el método de referencia en el estudio de la cardiopatía isquémica, es una técnica que no ofrece información precisa respecto a la repercusión fisiológica de las estenosis coronarias epicárdicas. En este contexto, el estudio invasivo fisiológico con la guía de presión permite determinar con alta precisión la repercusión isquémica de una estenosis coronaria, y es recomendada actualmente en las guías de práctica clínica para guiar la revascularización en estenosis de grado moderado o de severidad dudosa cuando no se dispone de métodos no invasivos de detección de isquemia. La reserva fraccional de flujo coronario (FFR) y el índice diastólico instantáneo sin ondas (iFR) son las dos técnicas con guía de presión más utilizadas en la actualidad, y se han consolidado en los últimos años como los métodos de referencia en los laboratorios de cardiología intervencionista para orientar las decisiones terapéuticas en la práctica clínica. Gracias a la dilatada evidencia científica que los soporta, ambos índices fisiológicos han alcanzando el grado máximo de recomendación en las últimas guías europeas de revascularización miocárdica. Aún así, existen todavía interrogantes de gran relevancia clínica pendientes de resolver, entre ellos su precisión y seguridad en determinados escenarios clínicos como la disfunción microcirculatoria coronaria (DMC) y el infarto agudo de miocardio (IAM)...Although coronary angiography is considered the gold standard in the assessment of ischemic heart disease (IHD), this technique does not provide an accurate information regarding the true physiological relevance of moderate coronary stenosis. In this context, invasive physiological assessment with pressure wires allows an accurate functional stenosis evaluation, and its use is strongly endorsed by the current European clinical guidelines when non-invasive functional tests are not available. Fractional flow reserve (FFR) and instantaneous wave-free ratio (iFR) are the two most utilized pressure-wire techniques nowadays, both have been consolidated as the reference techniques for guiding revascularization of moderate and stable coronary lesions in the catheterization laboratories worldwide, and have achieved the highest level of recommendation in the last European guidelines on myocardial revascularization. However, although FFR and iFR have been shown to improve long-term clinical outcomes, there are still pending relevant clinical questions, including their accuracy and safety in certain clinical scenarios such as coronary microcirculatory dysfunction (CMD) and acute myocardial infarction (AMI)...Fac. de MedicinaTRUEunpu
Two legs to stand on: why acetylcholine testing should be considered along with wire-based tests in the diagnosis of non-obstructive myocardial ischaemia.
No full text20.500.12530/8790
Going Beyond Counting First Authors in Author Co-citation Analysis
Get PDFThe 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
Get PDF“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
Get PDFWe 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
Dispelling the Myths Behind First-author Citation Counts
Get PDFWe 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
koamabayili/VECTRON-author-checklist: VECTRON author checklist
No full textWe have done our best to complete the author checklist relating to the use of animals in the hut study. Note that the objective for the hut study was to evaluate the IRS treatment applications for residual efficacy against Anopheles mosquitoes, including the local An. coluzzii mosquito population. Cows were only used to attract mosquitoes into the huts and no tests were carried out directly on the cows. The author checklist is intended for use with studies where experiments are carried out on animals, which is why we have had such difficulty in completing this for the hut study, as many of the questions do not relate to how the cows were used
Author-wise bibliometric analysis based on entropy.
No full textAuthor-wise bibliometric analysis based on entropy.</p
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