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排序方式: 共有1932条查询结果,搜索用时 46 毫秒
41.
Arya A Piorkowski C Sommer P Bollmann A Hindricks G 《Herzschrittmachertherapie & Elektrophysiologie》2008,19(2):68-72
Atrial fibrillation (AF) is a common arrhythmia, affecting an estimated 2 million people in the United States and its prevalence increases with age, reaching 10% in those > or = 80 years. AF confers a four- to fivefold increased risk of stroke compared to the general population and has been associated with a doubling of all-cause mortality. During the past decade, limited success rates of drug treatment stimulated an exploration of interventional treatment options for AF. As our knowledge on initiating triggers and perpetuating substrate of AF expanded, different potentially curative catheter ablation techniques have been developed. In this article we review the current patient selection criteria, methods, and the results of the catheter ablation of atrial fibrillation. 相似文献
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MacKenzie Megan Daviskiba Sydney Dow Miriam Johnston Peyton Balon Richard Javanbakht Arash Arfken Cynthia L. 《The Psychiatric quarterly》2021,92(3):1011-1020
Psychiatric Quarterly - Both healthcare workers (HCWs) and psychiatric patients during the COVID-19 pandemic appear to have elevated prevalence of psychiatric symptoms, but little is known about... 相似文献
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Arash Aghamohammadi-Sereshki Nicholas J. Coupland Peter H. Silverstone Yushan Huang Kathleen M. Hegadoren Rawle Carter Peter Seres Nikolai V. Malykhin 《Journal of psychiatry & neuroscience : JPN》2021,46(1):E186
BackgroundReductions in total hippocampus volume have frequently been reported in MRI studies in major depressive disorder (MDD), but reports of differences in total amygdala volume have been inconsistent. Childhood maltreatment is an important risk factor for MDD in adulthood and may affect the volume of the hippocampus and amygdala. In the present study, we examined associations between the volumes of the amygdala subnuclei and hippocampal subfields and history of childhood maltreatment in participants with MDD.MethodsWe recruited 35 patients who met the DSM-IV criteria for MDD and 35 healthy controls. We acquired MRI data sets on a 4.7 T Varian Inova scanner. We manually delineated the amygdala subnuclei (lateral, basal and accessory basal nuclei, and the cortical and centromedial groups) and hippocampal subfields (cornu ammonis, subiculum and dentate gyrus) using reliable volumetric methods. We assessed childhood maltreatment using the Childhood Trauma Questionnaire in participants with MDD.ResultsIn participants with MDD, a history of childhood maltreatment had significant negative associations with volume in the right amygdala, anterior hippocampus and total cornu ammonis subfield bilaterally. For volumes of the amygdala subnuclei, such effects were limited to the basal, accessory basal and cortical subnuclei in the right hemisphere, but they did not survive correction for multiple comparisons. We did not find significant effects of MDD or antidepressant treatment on volumes of the amygdala subnuclei.LimitationsOur study was a cross-sectional study.ConclusionOur results provide evidence of negative associations between history of childhood maltreatment and volumes of medial temporal lobe structures in participants with MDD. This may help to identify potential mechanisms by which maltreatment leads to clinical impacts. 相似文献
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In this paper, a new approach for fixed‐structure H2 controller design in terms of solutions to a set of linear matrix inequalities are given. Both discrete‐time and continuous‐time SISO time‐invariant systems are considered. Then the results are extended to systems with polytopic uncertainty. The presented methods are based on an inner convex approximation of the non‐convex set of fixed‐structure H2 controllers. The designed procedures are initialized either with a stable polynomial or with a stabilizing controller. An iterative procedure for robust controller design is given that converges to a suboptimal solution. The monotonic decreasing of the upper bound on the H2 norm is established theoretically for both nominal and robust controller design. Copyright © 2014 John Wiley & Sons, Ltd. 相似文献
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Pediatric Urology: Contemporary Strategies from Fetal Life to Adolescence Mario Lima,Gianantonio Manzoni Editors,Springer‐Verlag Mailand, 2015; hardback, 402 pages, £135.00; e‐book, £108.00. ISBN‐10: 8847056934, ISBN‐13: 978‐8847056923, e‐book ISBN: 978‐8847056930
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Arash Taghizadeh 《BJU international》2015,116(4):E1-E2
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