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Despite a burgeoning literature into the relationship between social media use (SMU) and adolescent well-being, clear conclusions about this relationship remain elusive as the literature has yielded a mixed bag of results. The aim of this study is to take a qualitative approach to improve our understanding of individual differences in (a) adolescents’ motives for using SMU, (b) their social media-related mood management, and (c) the effects they experience due to SMU. Based on eight focus groups among 55 adolescents ranging in age from 14 to 17 years, we found considerable homogeneity in adolescents’ motives to turn to social media. But we also found substantial heterogeneity in the moods that predict their SMU, their affective responses to SMU, and the effects they experienced due to SMU. Such sizeable individual differences may, in part, explain the inconsistent results in earlier quantitative work. We end with three lessons for future self-report studies.

The effect of teens' exposure to televised aggression depends on the characteristics of the viewer and the portrayed aggression. However, few studies have investigated which teens prefer what forms of televised aggression. Therefore, this study investigated how teens' trait aggression and sex guide their preferences for types (physical, verbal, and indirect) and contextual features of televised aggression (reward, punishment, justification, graphicness, realism, and humor). A linkage analysis combined survey data of 156 teens (balanced for trait aggression and sex, age 10-14 years) with a content analysis of 4,839 scenes from their favorite television programs. Aggressive teens preferred more physical aggression than less aggressive teens. Trait aggression was not related to preferences for contextual features of aggression. Boys preferred more physical aggression than girls, as well as more realistic, graphic, justified, rewarded, and punished aggression. This study underscores the importance of distinguishing between different viewers and forms of televised aggression.

Although sudden cardiac death is one of the most important mode of death in Western Countries, pathologists and public health physicians have not given this problem the attention it deserves. New methods of preventing potentially fatal arrhythmias have been developed, and the accurate diagnosis of the causes of sudden cardiac death is now of particular importance. Pathologists are responsible for determining the precise cause of sudden death but there is considerable variation in the way in which they approach this increasingly complex task. The Association for European Cardiovascular Pathology developed guidelines, which represent the minimum standard that is required in the routine autopsy practice for the adequate assessment of sudden cardiac death, including not only a protocol for heart examination and histological sampling, but also for toxicology and molecular investigation. Our recommendations apply to university medical centres, regional and district hospitals and all types of forensic medicine institutes. If a uniform method of investigation is adopted throughout the European Union, this will lead to improvements in standards of practice, allow meaningful comparisons between different communities and regions and, most importantly, permit future trends in the patterns of disease causing sudden death to be monitored.Key words: Autopsy. Guidelines. Protocol. Sudden cardiac death.Guías para la práctica de la autopsia en casos de muerte súbita cardíaca.Guidelines for autopsy investigation of sudden cardiac death. INTRODUCCIÓN:La muerte súbita cardíaca (MSC) es la principal causa de muerte en todas las comunidades de los Estados Unidos y de la Unión Europea, pero su incidencia real es desconocida. Los métodos internacionalmente aceptados de certificación de la muerte no incluyen una categoría específica para la MSC. Se estima que en Estados Unidos entre 250.000 y 400.000 adultos mueren súbitamente cada año por patologías de origen cardiovascular, con una incidencia global de 1 a 2/1.000 habitantes y año [13,18,29]. Un grupo de trabajo de la Sociedad Europea de Cardiología ha recogido tasas de mortalidad de 36-128 fallecimientos por 100.000 habitantes y año [3,19], más del 60% de los cuales son resultado de enfermedad coronaria arteriosclerótica. Entre la población general de adolescentes y adultos jóvenes menores de 30 años, el riego global de MSC es de 1/100.000 y un amplio espectro de enfermedades puede explicar el evento final [9].Las mayores dificultades en la interpretación de los datos epidemiológicos de muerte súbi-ta son la falta de estandarización en la codificación de los certificados de defunción y la variabilidad en la definición de muerte súbita. La muerte súbita se ha definido como "aquel evento fatal inesperado, de origen natural, que ocurre en la hora siguiente al inicio de los síntomas en un individuo aparentemente sano o con una enfermedad cuya gravedad no hace prever un final tan rápido" [14]. Este concepto describe fielmente muchas muertes presenciadas en la comunidad o en los se...

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