Reentrant ventricular arrhythmias in the late myocardial infarction period. 12. Spontaneous versus induced reentry and intramural versus epicardial circuits

One to 5 days after one-stage ligation of the left anterior descending coronary artery in dogs, reentrant excitation can be induced by programmed premature stimulation in the surviving electrophysiologically abnormal, thin epicardial layer overlying the infarct. In experiments in four dogs, reentrant excitation occurred “spontaneously” during a regular sinus or atria) rhythm. A tachycardia-dependent Wenckebach conduction sequence in a potentially reentrant pathway was the initiating mechanism for spontaneous reentrant tachycardias and was the basis for both manifest and concealed reentrant extrasystolic rhythms. In all dogs showing spontaneous reentry, reentrant excitation could also be induced by premature stimulation at cycle lengths much shorter than those associated with spontaneous reentry, and induced reentrant circuits were always different from those during spontaneous reentry. In two dogs, the reentrant circuit was located intramurally in close proximity to a patchy septal infarction.The study illustrates that irrespective of the anatomic localization of reentrant circuits (epicardial or intramural), their dimension (large or small) or their mechanism of initiation (programmed premature stimulation or “spontaneous”), reentrant excitation always occurred in a figure 8 configuration (or a modification thereof). The figure 8 model, rather than the ring model or the leading circle model, may be the common model of reentry in the mammalian heart

Symbiotic modeling: Linguistic Anthropology and the promise of chiasmus

Reflexive observations and observations of reflexivity: such agendas are by now standard practice in anthropology. Dynamic feedback loops between self and other, cause and effect, represented and representamen may no longer seem surprising; but, in spite of our enhanced awareness, little deliberate attention is devoted to modeling or grounding such phenomena. Attending to both linguistic and extra-linguistic modalities of chiasmus (the X figure), a group of anthropologists has recently embraced this challenge. Applied to contemporary problems in linguistic anthropology, chiasmus functions to highlight and enhance relationships of interdependence or symbiosis between contraries, including anthropology’s four fields, the nature of human being and facets of being human

A new age of believing women? Judging rape narratives online

Book synopsis: This book critically examines the last few decades of discussion around sex and violence in the media, on social media, in the courtroom and through legislation. The discursive struggles over what constitutes "sexual violence", "victims" and "offenders" is normally determined through narratives: a selective ordering of events and participants. Centrally, the book investigates the social processes involved in the telling of stories of rape and its political implications. From a multidisciplinary feminist perspective, this volume explores what narratives about sexual violence are deemed legitimate at this historical juncture. This volume brings together feminist scholars working in a wide variety of disciplines including law, legal studies, history, gender studies, ethnology, media, criminology and social work from across the globe. Through situated empirical work, these scholars seek to understand currents movements between the criminal justice system and the cultural imagination

Terrorism, governmentality and the simulated city: the Boston Marathon bombing and the search for suspect two

This article examines the online circulation of a photograph of the immediate aftermath of the 2013 Boston Marathon bombings taken by David Green, a Boston Marathon runner. The photograph fortuitously captured an image of Dzhokhar Tsarnaev, the younger Tsarnaev brother, running from the scene. Initially, Tsarnaev went unnoticed by online message board users and FBI investigators – he was just another face in the urban crowd. However, after he was identified as suspect two, he emerged in the photograph as the figure of terror, the condensed embodiment of the spectacular attack, and thus as a spectre, a figure whose appearance in the archive of the past haunts the future. The author examines how this spectral emergence simultaneously reveals the attack terrorism launches against everyday mediations and how everyday mediations respond to terrorist spectacle. He argues that photography sustains vernacular practices that also support the practices of urban governmentality. Understanding urban governmentality thus requires attending to the urban archive of visual mediation in which the relationships between past and present, image and reality, and surveillance and spectacle are always contingent and open to revision

Trije tropi imperija: nujnost, spektakel, vdanost

This essay identifies three recurrent appeals in the discourse of empire. These are presented through explication of Thucydides\u27 last speech to the Athenian demos, a documentary essay by Max Boot, one of the intellectual architects of the invasion of Iraq, and Edmund Burke\u27s speech regarding a colonial insurgency, "On Conciliation with America."Članek identificira tri ponavljajoče se apele v imperialnem diskurzu. Predstavljeni so z razlago zadnjega Tukididovega govora Atencem, dokumentarne razprave Maxa Boota, enega izmed duhovnih arhitektov napada na Irak, ter govora Edmunda Burka ob kolonialnem uporu "On Conciliation with America"

Le post-réalisme après le 11 septembre

D’après les réalistes, les événements du 11 septembre et leurs conséquences renforcent le réalisme comme théorie dominante des relations internattionales, en soulignant les dangers permanents de la société internationale anarchique et en montrant que les États souverains doivent continuer à recourir à la force militaire pour assurer leurs intérêts et leur sécurité. Si le post-réalisme reconnaît la pertinence de la vision réaliste, il n’en suggère pas moins que l’action politique est plus complexe et plus dynamique, en soulignant l’importance de dimensions, interprétations et significations à la fois réalistes et non réalistes pour une compréhension critique des relations internationales. C’est dans cette perspective qu’est analysé l’impérialisme américain, abordé comme formation culturelle à travers une analyse discursive. D’après le post-réalisme, le fait de regarder le monde à travers un ensemble pluriel de grilles de lectures est susceptible de produire des stratégies politiques plus prudentes.The events of 9/11 and afterwards appear to reinforce realism as the dominant theory of international relations. 9/11 demonstrated the continuing dangers of anarchic international society, realists believe, and showed that sovereign states must continue to guard their own interests, using military force as an essential means to maintain security. Post-realists agree that realism’s cognitive simplicity fits the perceived crisis of 9/11. At the same time, post-realism suggests that political action is more complex and dynamic than realism believes. The attack from Al Qaeda did not come from another state, and the military responses in Afghanistan and Irak did not demonstrably weaken it. Post-realism emphasizes the importance of multiple perspectives, interpretations, and meanings – realist and non-realist – for developing a critical understanding of international relations. As one example, this paper includes an account of us imperialism, identifiable through discursive analysis as a distinctive cultural formation. Though the single, simple viewpoint of realism may seem compelling, post-realism suggests that seeing the world through multiple frames is likely to produce more prudent strategies in world politics