1,720,961 research outputs found
Risk stratification of normotensive pulmonary embolism: prognostic impact of copeptin
No full textThe prognostic value of copeptin, the C-terminal fragment of the precursor protein of vasopressin which is released upon stress, and hypotension in pulmonary embolism is unknown, especially if combined with biomarkers reflecting different pathophysiological axes such as myocardial injury (high-sensitivity troponin T (hsTnT)) and stretch (N-terminal pro-brain natriuretic peptide (NT-proBNP)). We prospectively studied 268 normotensive pulmonary embolism patients included in a single-centre cohort study. Patients with an adverse 30-day outcome (5.6%) had higher copeptin levels than patients with a favourable course (median (interquartile range) 51.8 (21.6-90.8) versus 13.2 (5.9-39.3) pmol.L-1; p=0.020). Patients with copeptin levels above the calculated optimal cut-off value of 24 pmol.L-1 had a 5.4-fold increased risk for an adverse outcome (95% CI 1.68-17.58; p=0.005). We developed a strategy for risk stratification based on biomarkers. None of 141 patients (52.6%) with hsTnT = 24 pmol.L-1 stratified patients with elevated hsTnT and NT-proBNP as intermediate-low and intermediate-high risk (5.6% and 20.0% adverse outcome, respectively). Compared to the algorithm proposed by the 2014 European Society of Cardiology guideline, more patients were classified as low risk (52.8% versus 17.5%, p<0.001) and more patients in the intermediate-high risk group had an adverse outcome (20.0% versus 11.6%). Copeptin might be helpful for risk stratification of normotensive patients with pulmonary embolism, especially if integrated into a biomarker-based algorithm
Risk stratification of normotensive pulmonary embolism based on the sPESI - Does it work for all patients?
No full textInvestigation of a new pathophysiological axis for risk stratification of normotensive pulmonary embolism: prognostic impact of copeptin
No full textAge-adjusted high-sensitivity troponin cut-off value for risk stratification of pulmonary embolism
No full textHigh-sensitivity troponin T (hsTnT) helps in identifying pulmonary embolism patients at low risk of an adverse outcome. In 682 normotensive pulmonary embolism patients we investigate whether an optimised hsTnT cut-off value and adjustment for age improve the identification of patients at elevated risk. Overall, 25 (3.7%) patients had an adverse 30-day outcome. The established hsTnT cut-off value of 14 pg.mL(-1) retained its high prognostic value (OR (95% CI) 16.64 (2.24-123.74); p=0.006) compared with the cut-off value of 33 pg.mL(-1) calculated by receiver operating characteristic analysis (7.14 (2.64-19.26); p= 75 years) patients, an age-optimised hsTnT cut-off value of 45 pg.mL(-1) but not the established cut-off value of 14 pg.mL(-1) predicted an adverse outcome. An age-adjusted hsTnT cut-off value (>= 14 pg.mL(-1) for patients aged = 45 pg.mL(-1) for patients aged >= 75 years) provided additive and independent prognostic information on top of the simplified pulmonary embolism severity index (sPESI) and echocardiography (OR 4.56 (1.30-16.01); p=0.018, C-index=0.77). A three-step approach based on the sPESI, hsTnT and echocardiography identified 16.6% of all patients as being at higher risk (12.4% adverse outcome). Risk assessment of normotensive pulmonary embolism patients was improved by the introduction of an age-adjusted hsTnT cut-off value. A three-step approach helped identify patients at higher risk of an adverse outcome who might benefit from advanced therapy
Elevated levels of interleukin 6 at the time of acute pulmonary embolism diagnosis are associated with short- and long-term adverse outcomes
No full textGoing 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
Elevated levels of interleukin 6 at the time of acute pulmonary embolism diagnosis are associated with short- and long-term adverse outcomes
No full textVariations 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
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