Presented herein is the first case of dislocation of the closing element of the artificial low-profile aortic valve to the abdominal aorta, which happened during replacement. Toward completion of extracorporeal circulation a 37-year-old man showed the signs of aortic insufficiency because of dislocation of the closing element. After resumption of extracorporeal circulation repeated replacement was accomplished. To detect the site of graft cusp embolism, transesophageal echocardiography and duplex scanning of the abdominal aorta were employed. On the 18th day following the first intervention the patient developed thromboembolism to the distal arterial bed. Emergency thrombectomy from the arteries of the right lower extremity was performed and a foreign body was removed from the abdominal aorta, using left-sided thoracophrenolumbotomy. The patient was discharged from the clinic in a satisfactory condition.
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Front Psychol
January 2025
Department of English, Faculty of Arts and Humanities, University of Macau, Macau SAR, China.
This study investigates how lower-level English language learners achieve and maintain intersubjectivity and navigate through co-constructed framings during context-embedded tasks such as improvised role-play. In language education settings, activities associated with interactions often reflect multi-layered participant orientations beyond mere linguistic execution. From the perspectives of ethnomethodology and conversation analysis, linguistic actions are effective only when they are intersubjectively understood: the complexity of an activity necessitates corresponding levels of intersubjectivity for smooth progression.
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Liverpool School of Tropical Medicine, Liverpool, England, UK.
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Université Lyon 1, CNRS, Laboratoire de Biométrie et Biologie Evolutive UMR 5558, Villeurbanne F-69622, France.
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Biophysics Department, Faculty of Science, Cairo University, 12613 Giza, Egypt. Electronic address:
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January 2025
Fachbereich Chemie, Philipps-Universität Marburg, Hans-Meerwein-Strasse 4, 35043 Marburg, Germany.
For decades, advances in chiral transition metal catalysis have been closely tied to the development of customized chiral ligands. Recently, however, an alternative approach to this traditional metal-plus-chiral-ligand method has emerged. In this new strategy, chiral transition metal catalysts are composed entirely of achiral ligands, with the overall chirality originating exclusively from a stereogenic metal center.
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