1,720,968 research outputs found
Clinical Use of Biomarkers in Cardiac Amyloidosis
No full textAmyloidosis is a systemic condition characterized by multiple organs involvement. A multidisciplinary and multimodal approach in assessing patients is pivotal and recommended by the international scientific societies. Biomarkers represent an essential noninvasive tool to increase the suspicion of disease and orient further workup and clinical management of patients. This review provides an updated contemporary focus on the clinical use of biomarkers in cardiac amyloidosis, emphasizing their role in both the diagnostic and prognostic setting and discussing future perspective of emerging biomarkers
Angiopatia amiloide cerebrale e occlusione dell’auricola sinistra: evidenze e possibili linee operative per un approccio collaborativo fra Cardiologia e Neurologia
No full textThis review highlights the epidemiological and clinical challenge associated with managing patients who have cerebral amyloid angiopathy (CAA) and atrial fibrillation. As the population ages, clinicians are increasingly required to devise appropriate management strategies for this specific patient subgroup. These patients face not only the risk of intracerebral hemorrhage associated with oral anticoagulant therapy but also complications due to CAA. CAA is an age-related small vessel disease characterized by the deposition of β-amyloid in the walls of cortical and leptomeningeal arteries, arterioles, and capillaries. This condition progressively weakens the vascular integrity, thereby increasing the risk of major bleeding events. The lack of randomized clinical trials necessitates a multiparametric and multidisciplinary approach to assess the extent of vasculopathy and balance thromboembolic and hemorrhagic risks, aiming to tailor the most effective management strategy for each patient. In managing such cases, it is crucial to address concomitant risk factors and consider both pharmacological and non-pharmacological interventions, such as left atrial appendage occlusion, to mitigate the risk of stroke
Fulminant Myocarditis Presenting With Refractory Ventricular Fibrillation During BRAF/MEK Inhibitor Therapy
Full text linkBackground: Myocarditis is a rare but potentially fatal complication of BRAF/MEK inhibitor therapy. Early detection through vigilant monitoring is crucial. Case Summary: A 35-year-old woman with stage IIIB melanoma treated with adjuvant trametinib and dabrafenib suffered a cardiac arrest due to refractory ventricular fibrillation. Coronary angiography excluded culprit lesions. Despite intensive management and extracorporeal life support, the patient exhibited irreversible multiorgan failure and died. A postmortem examination revealed massive biventricular and septal lymphohistiocytic myocarditis. Discussion: BRAF/MEK inhibitors have been demonstrated to enhance survival outcomes in melanoma. However, there exists a potential for cardiotoxic events, including myocarditis, which can be severe albeit infrequent. To date, only isolated cases of fatal myocarditis have been reported. This case highlights the importance of systematic cardiac surveillance, even in asymptomatic patients. Take-Home Messages: Fulminant myocarditis is a rare but life-threatening adverse event of BRAF/MEK inhibitor therapy. Multimodal cardiac evaluation is strongly recommended
Tafamidis in the Treatment of ATTR-related Cardiomyopathy
No full text: Transthyretin amyloid cardiomyopathy (ATTR-CM) is caused by the myocardial extracellular deposition of amyloid fibrils formed from the dissociation of TTR tetramer into monomers. The rate-limiting step in TTR amyloidogenesis is the dissociation of the TTR tetramer into monomers: Tafamidis is an effective TTR-stabilizer in its native homotetrameric structure. Tafamidis is a safe and effective drug in reducing symptoms, hospitalization and mortality in accurately selected patients affected by hereditary and wild-type transthyretin amyloid cardiomyopathy
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
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
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