1,721,113 research outputs found
International Recommendations for Competitive Sport Eligibility
No full textPelliccia Antonio. International Recommendations for Competitive Sport Eligibility. In: Les Cahiers de l'INSEP, n°41, 2008. Le sport, c'est la santé ? pp. 68-72
Isolated non-ischemic left ventricular scar in athletes: scientific and clinical rationale behind the 2023 Recommendations of the Italian Sports Cardiology Guidelines (COCIS)
No full textIsolated non-ischemic left ventricular scar (NLVS) refers to the presence of significant late gadolinium enhancement (LGE) with subepicardial/ midmyocardial distribution detected through cardiac magnetic resonance (CMR) in the absence of other features of a specific disease and excluding the junctional spotty pattern that is not pathological. This nosographic entity is relatively recent, emerging with the widespread clinical use of CMR. The NLVS has recently been associated with cardiac arrest in sports. On the other hand, cohort where CMR was performed on apparently healthy volunteers revealed prevalence of around 5-10% in asymptomatic athletes, suggesting that in the majority of cases the condition has a benign course. Today, the most common clinical scenario involves the diagnosis of NLVS following a CMR performed for ventricular arrhythmias, often in the absence of family history, baseline ECG abnormalities, or ventricular dysfunction on echocardiography. However, the clinical presentation can range from relatively simple isolated premature ventricular beats to complex ventricular-arrhythmias and from limited LGE to extensive (ring-like) scars, sometimes associated with a positive genetic test. Although robust evidence for risk stratification is still lacking, it is reasonable to hypothesize a correlation between phenotype severity and arrhythmic risk, analogous to other cardiomyopathies. This article explores the pathophysiological hypotheses surrounding NLVS in athletes, the appropriate diagnostic work-up, strategies for risk stratification, and the recommendations for sports eligibility outlined in the recent 2023 Italian sports cardiology guidelines (COCIS)
Left ventricular non-compaction and hypertrabeculation in the athlete: Distinguishing between pathology and physiology
No full textPrevalence and clinical significance of low QRS voltages in healthy individuals, athletes and patients with cardiomyopathy: implications for sports preparticipation cardiovascular screening
No full textLow QRS voltages (LQRSV), defined as a QRS amplitude from peak to nadir < 0.5 mV in all limb leads, are an emerging diagnostic finding on the electrocardiogram (ECG). In healthy individuals and athletes, LQRSV are rare (2.2-4% of elite athletes, 0.5% of recreational athletes, and 0.3% of sedentary individuals). LQRSV athletes commonly show ventricular arrhythmias (VAs) on exercise, and up to 40% of those with LQRSV and VAs have late gadolinium enhancement (LGE) on cardiac magnetic resonance (CMR). The prevalence of LQRSV in arrhythmogenic cardiomyopathy ranges from 17-40%, predicts left ventricular (LV) involvement, and is correlated with more extensive LGE replacement on CMR. In hypertrophic cardiomyopathy (HCM), LQRSV ranges from 0.7-11%. LQRSV-HCM patients have more segments with LGE, despite relatively smaller LV mass, suggesting a more advanced clinical stage and a worse prognosis. In dilated cardiomyopathy (DCM), LQRSV range from 6-7%, but may be higher (36%) in certain genetic forms of DCM. On a follow-up, LQRSV are independently associated with incident cardiac events, such as sudden death, sustained ventricular arrhythmia, or appropriate internal cardioverter defibrillator discharge. In cardiac amyloid, LQRSV range from 34-66% and demonstrate a negative prognostic value, with worse clinical outcomes regardless of underlying biologic, genetic, and clinical variables. In conclusion, LQRSV deserve careful consideration for exclusion of arrhythmogenic substrates in healthy individuals, athletes, and patients. While additional research is needed, it is reasonable that LQRSV should trigger clinical investigation to exclude underlying diseases at risk of life-threatening arrhythmias
A short history of the European Association of Preventive Cardiology (EAPC)
No full textDe Backer G, Perk J, Wood D, et al. A short history of the European Association of Preventive Cardiology (EAPC). European Journal of Preventive Cardiology . 2022: zwac027.The history of the EAPC is closely related to the history of the European Society of Cardiology (ESC). The ESC decided at the turn of the century to overcome the splitting into 27 topic related Working Groups with great differences in size and activities and to create a new organizational concept based on Associations, each having an official ESC scientific journal and an annual ESC connected congress. The European Association for Cardiovascular Prevention and Rehabilitation was built on the fundaments of epidemiology and prevention, exercise physiology, cardiac rehabilitation and sports cardiology. The official journal of the Association was launched in 2003 and the first EuroPRevent Congress was held in Athens in 2006. During the following years, the different interests of the founding working groups came closer together, which resulted in a name change of the Association into "European Association of Preventive Cardiology" and of the journal into "European Journal of Preventive Cardiology". The name change marked the migration of Preventive Cardiology to centre stage in the ESC. This document summarizes how and from where the EAPC started and where it stands now. Published on behalf of the European Society of Cardiology. All rights reserved. © The Author(s) 2022. For permissions, please email: [email protected]
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
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