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Prognostic Role of Preoperative Tricuspid Annular Plane Systolic Excursion (TAPSE) in Mitral Valve Replacement (MVR) for Rheumatic Mitral Stenosis Patients

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World Journal of Cardiovascular Surgery 2024年第8期14卷 115-130页

作者： Satyajit Sharma Muhit Abdullah Md. Noor-E-Elahi Mozumder Munjerin Refat Synthee Md. Zafar-Al-Nimari Anowarul Azim Saikat Das Gupta Dewan Iftakher Raza Chowdhury Siddhartha Shankar Howlader Noel Crypian Gomes Saleh Ahmed samir Kumar Biswas Department of Cardiac Surgery National Heart Foundation Hospital & Research Institute (NHFH & RI) Dhaka Bangladesh Department of Cardiac Surgery National Institute of Cardiovascular Diseases & Hospital Dhaka Bangladesh Department of Cardiothoracic and Vascular Surgery Square Hospital Dhaka Bangladesh Department of Cardiothoracic and Vascular Surgery Evercare Hospital Chattogram Bangladesh

Tricuspid annular plane systolic excursion has been proposed as a simple and reproducible parameter for quantitative assessment of the right ventricular ejection fraction. The prognostic importance of preoperative TAPSE in patients with mitral valve replacement for rheumatic mitral stenosis patients is still under focused. Therefore, the objective of the study was to predict the outcome after MVR in rheumatic mitral stenosis patients in relation to preoperative TAPSE. This comparative cross-sectional study was conducted at the Department of Cardiac Surgery, National Heart Foundation Hospital and Research Institute. A total of 72 patients of rheumatic mitral stenosis patients who underwent mitral valve replacement were included in the study. They were divided into two groups: Group A and B. Group A included 36 patients with TAPSE 0.05) except for the preoperative TAPSE. Mean TAPSE of Group A was 13.17 (±1.40) and Group B was 18.61 (±1.57), the difference was statistically significant (p 0.05). Among the postoperative complications, including postoperative atrial fibrillation was higher in Group A (30.56%) than Group B (11.11%), mean ventilation time was higher in Group A (27.78%) than Group B (5.56%), length of intensive care was higher in Group A (33.33%) than Group B (11.12%), and hospital stay was higher in Group A (25.0%) than Group B (5.56%), (p < 0.05). Higher preoperative TASPE could be used as a prognostic tool for MVR in rheumatic mitral stenosis patients in our settings.

关键词： Tricuspid Annular Plane Systolic Excursion Mitral Valve Replacement Rheumatic Heart Disease Mitral Stenosis Right Ventricular Ejection Fraction Postoperative Complications

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ON THE SUPERSTABILITY OF THE PEXIDER TYPE GENERALIZED TRIGONOMETRIC FUNCTIONAL EQUATIONS

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Acta Mathematica Scientia 2014年第6期34卷 1749-1760页

作者： Driss ZEGLAMI Ahmed CHARIFI samir KABBAJ Department of Mathematics E.N.S.A.M Moulay Ismail University Department of Mathematics Faculty of SciencesIbn Tofail University

The aim of this paper is to investigate the superstability problem for the pexiderized trigonometric functional equation∑ v∈Φ∫Kf（xkv（y）k^-1）dwK（k）= Φ g（x）h（y）, x, y ∈ G,where G is any topological group, K is a compact subgroup of G, ωK is the normalized Haar measure of K, Φ is a finite group of K-invariant morphisms of G and f, g, h are continuous complex-valued ***, we have generalized the results of stability for d＇Alembert＇s and Wilson＇s equations by R. Badora, J. Baker, B. Bouikhalene, P. Gavruta, S. Kabbaj, Pl. Kannappan, G. ***, J.M. Rassias, A. Roukbi, L. Sz′ekelyhidi, D. Zeglami, etc.

关键词： superstability generalized Pexider d'Alembert equation Wilson's functional equation group of morphisms

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GLOBAL EXISTENCE AND ASYMPTOTIC BEHAVIOR OF SOLUTIONS FOR SOME COUPLED SYSTEMS VIA A LYAPUNOV FUNCTIONAL

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Acta Mathematica Scientia 2019年第6期39卷 1538-1550页

作者： Lamia DJEBARA Salem ABDELMALEK samir BENDOUKHA Department of Mathematics and Computer Science ICOSI LaboratoryUniversity of KhenchelaKhenchela04000Algeria Department of Mathematics and Informatics Faculty of Exact Sciences and Natural Sciences and LifeUniversity of Larbi TebessiTebessa12002Algeria Electrical Engineering Department College of Engineering at YanbuTaibah UniversitySaudi Arabia

The purpose of this work is to study the global existence and asymptotic behavior of solutions to a coupled reaction-diffusion system describing epidemiological or chemical situations. Our analytical proofs are based ... 详细信息

关键词： epidemic model reaction-diffusion global existence of solutions asymptotic stability

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Spectral lags of flaring events in LS I+61°303 from RXTE Observations

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Research in Astronomy and Astrophysics 2016年第7期16卷 29-38页

作者： Tamal Sarkar samir Sarkar Arunava Bhadra High Energy&Cosmic Ray Research Centre University of North BengalSiliguriWB 734013India University Science Instrumentation Centre University of North BengalSiliguriWB 734013India

This work reports the first discovery of（negative） spectral lags in X-ray emission below 10 ke V from the gamma ray binary LS I＋61？303 during large flaring episodes using Rossi X-ray Timing Explorer（RXTE） observations. It is found from the RXTE data that during the flares, low energy（3–5 ke V） variations lead the higher energy（8–10 ke V） variations by a few tens of seconds whereas no significant time lag is observed during the non-flaring states. The observed spectral lag features for flaring events suggest that inverse Compton scattering may be operating, at least in some part of the system. Another possibility is that the sites of particle acceleration may be different for flaring and non-flaring events such as in the microquasar model, in which the flaring radiation may come from hot spots sitting above the black hole while steady state emissions are due to the jets.

关键词： X-rays:binaries X-rays:individual(LS I+61?303)

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Shear reinforcement effect of reinforced concrete tie-columns on the lateral resistance of confined masonry walls

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Earthquake Engineering and Engineering Vibration 2016年第2期15卷 313-324页

作者： samir Bouhedja Abdelkrim Bourzam Ahmed Boukhaled Ammar Nechnech University of Sciences and Technology Houari Boumediene(USTHB)Faculty of Civil EngineeringLaboratory of EnvironmentWaterGeomechanics and Structures(LEEGO)BP 32 El AliaBab EzzouarAlgiers16111Algeria University of Sciences and Technology Houari Boumediene(USTHB)Faculty of Civil EngineeringLaboratory of Built Environment Research(LBE)BP 32 El AliaBab EzzouarAlgiers16111Algeria

Tie-columns improve significantly the lateral resistance of masonry bearing walls against persistent, transient and accidental loads. The research work described herein has been carried out to assess the lateral resistance of confined masonry walls, where contribution of the masonry panel is evaluated according to material mechanics and tie-columns effect is estimated by a proposed analytical formulation based on a model reported on previously. This approach takes into account the effect of dowel support on the reaction of its adjacent shear reinforcement： the conditions for the various contributions of transverse reinforcements are better defined following a clear evaluation of the participation ratio of these reinforcements. Lateral resistances of confined masonry walls measured in full-scale tests and gleaned from the literature are compared and checked with resistances calculated using the present approach.

关键词： reinforcement columns confined reinforced walls Shear formulation panel participation herein

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The xanthate route to all-carbon quaternary centers

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Science China Chemistry 2019年第11期62卷 1450-1462页

作者： Béatrice Quiclet-Sire samir Z.Zard Laboratoire de Synthèse Organique Ecole Polytechnique

This review discusses the numerous routes to all-carbon quaternary centers based on the unique radical chemistry of xanthates. Itsummarizes the various approaches to the synthesis of tertiary xanthates then describes the intra- and intermolecular radicaladditions and combinations thereof that have so far been used to construct quaternary centers.

关键词： xanthates quaternary centers radical addition cyclization tandem reactions

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Microstructure of coupled Al/gray cast iron obtained by molding and its effect on mass loss

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China Foundry 2018年第5期15卷 378-383页

作者： Mohamed Bouitna Naima Boutarek-Zaourar samir Mansour samir Mourad Chentouf Eric Mossang Laboratory of Materials Technology Faculty of Mechanical Engineering and Process EngineeringUniversity of Science and Technology Houari BoumedieneB.P.32 El Alia16111 AlgiersAlgeria Department of Mechanical Engineering School of Technology Superior1100 Notre-Dame Street WestMontrealQuebec H3C 1K3Canada NEEI Institute National Center for Scientific Research25rue des MartyrsBO 16638042Grenoble CedexFrance

This study aims to consolidate the surface of gray cast iron with aluminum deposition by developing a method that combines the preparation and surface treatment in a single operation. The effect of the wall thickness of the castings on the microstructure of the formed layers was studied, and two thicknesses, 8 mm and 25 mm, were studied. The formation of a continuous and homogeneous rich aluminum layer on the surface of the cast iron was observed. The formed layer is composed of two successive zones identified as two proeutectoid phases FeAl+FeAl/FeAl2 and single-phase FeAl, which significantly increases the surface hardness. Furthermore, this change in surface composition makes it possible to reduce the mass of the immersed samples in a 1 M hydrochloric acid solution during different exposure times(1 to 4 days). Consequently, a clear improvement in the corrosion resistance of the treated layers is highlighted.

关键词： gray cast iron aluminum coating treatment in the mold mass loss

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Association of hepatitis C virus infection and diabetes

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World Journal of Gastroenterology 2009年第40期15卷 5114-5115页

作者： samir Rouabhia Rachid Malek Hocine Bounecer Department of Internal Medicine University Hospital Center Touhami Benflis Department of Internal Medicine University Hospital Center Saadna Abdenour Department of Epidemiology and Preventive Medicine University Hospital Center Touhami Benflis

Epidemiologic studies have suggested a relation between hepatitis C virus (HCV) infection and diabetes mellitus. HCV infection is emerging as a metabolic disease, and diabetes mellitus as a risk factor for HCV infection. However, some data on the prevalence of antibodies to HCV in patients with diabetes are conflicting. These seroprevalence data should be interpreted with caution. Some potential bias may occur in those clinic-based studies that target a specif ic disease group. In this letter we explain some reasons for these conflicting studies.

关键词： Prevalence Hepatitis C Diabetes mellitus

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Existence Results for a Class of Periodic Evolution Variational Inequalities

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Chinese Annals of Mathematics,Series B 2007年第6期28卷 629-650页

作者： samir ADLY Daniel GOELEVEN Michel THRA DMI-XLIM UMR-CNRS 6172Université de Limoges123 Avenue A.Thomas87060 Limoges CedexFrance. IREMIA Université de La Réunion97400 Saint-DenisFrance.

In this paper, using the Brouwer topological degree, the authors prove an existence result for finite variational inequalities. This approach is also used to obtain the existence of periodic solutions for a class of e... 详细信息

关键词： Variational inequalities Differential inclusions Topological degree Guiding functions Periodic solutions

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Cameron ulcers:An atypical source for a massive upper gastrointestinal bleed

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World Journal of Gastroenterology 2012年第35期18卷 4959-4961页

作者： samir Kapadia Sophia Jagroop Atul Kumar Department of Medicine Stony Book Univer sity School of MedicineStony BrookNY 11794United States Gastroenterology and Hepatol ogy Northport VA Medical CenterNorthportNY 11768United States

Cameron lesions represent linear gastric erosions and ulcers on the crests of mucosal folds in the distal neck of a hiatal hernia(HH).Such lesions may be found in upto 50% of endoscopies performed for another *** typically asymptomatic,these may rarely present as acute,severe upper gastrointestinal bleed(GIB).The aim is to report a case of a non-anemic 87-year-old female with history of HH and atrial fibrillation who presented with hematemesis and melena resulting in hypovolemic *** esophagogastroduodenoscopy was required to identify multiple Cameron ulcers as the *** in a patient with HH should involve meticulous visualization of hernia neck and surrounding *** ulcers should be considered in all patients with severe,acute GIB and especially in those with known HH with or without chronic anemia.

关键词： Cameron lesion Upper gastrointestinalbleeding Shock Hiatal hernia

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