检索结果-南通市图书馆

Transcatheter aortic valve implantation in 2015

在线全文

学校读者我要写书评

暂无评论

Journal of Geriatric Cardiology 2016年第6期13卷 511-513页

作者： Darren Mylotte Faisal Sharif Nicolo Piazza Marco Moscarelli khalil fattouch Thomas Modine University Hospital Galway Ireland McGill University Health Centre Montreal Quebec Canada GVM Care and Research Unit Anthea Hospital Bari ltaly GVM Care and Research Unit Maria Eleonora Hospital Palermo Italy Hopital Cardiologique Lille France

The last decade has seen transcatheter aortic valve implantation （TAVI） emerge as the standard of care for patients with severe symptomatic aortic stenosis deemed to be either at excessiveor high-risk for surgical aortic valve replacement （SAVR）. This position is supported by three important multicentre randomized trials comparing TAVI to the historical gold standard therapies：（1） The Placement of AoRTic TraNscathetER Valve Trial Edwards SAPIEN Transcatheter Heart Valve （PARTNER） IB Trial compared TAVI （Edwards SAPIEN, Edwards Lifesciences Inc., Irvine, CA） to optimal medical therapy in patients at excessive surgical risk, and demonstrated an absolute mortality reduction of 〉 20% at 1-year, an effect that was maintained out to 5-year follow-up;Ill （2） The PARTNER 1A Trial compared TAVI （Edwards SAPIEN, Edwards Lifesciences Inc.,

关键词： Aortic valve Echocardiography Risk factor Surgery

Minimally invasive aortic valve surgery

在线全文

学校读者我要写书评

暂无评论

Journal of Geriatric Cardiology 2016年第6期13卷 499-503页

作者： Sebastiano Castrovinci Sam Emmanuel Marco Moscarelli Giacomo Murana Giuseppa Caccamo Emanuela Clara Bertolino Giuseppe Nasso Giuseppe Speziale khalil fattouch Department of Cardiovascular Surgery G VM Care and Research Maria Eleonora Hospital Palermo Italy Department of Cardiothoracic Surgery St Vincent's Hospital Sydney Australia Department of Cardiovascular Surgery GVM Care and Research Anthea Hospital Bari Italy Department of Cardiothoracic Surgery NHLI Imperial College London UK Department of Cardiovascular Surgery S. Orsola-Malpighi Hospital Alma Mater Studiorum University of Bologna Bologna Italy Cardiac Department Ospedale Buccheri La Ferla Fatebenefratelli Palermo Italy Department of Cardiology Policlinieo 'P. Giaccone' University of Palermo Palermo Italy Department of Surgery and Cancer University of Palermo Palermo Italy

Aortic valve disease is a prevalent disorder that affects approximately 2% of the general adult population. Surgical aortic valve replacement is the gold standard treatment for symptomatic patients. This treatment has demonstrably proven to be both safe and effective. Over the last few decades, in an attempt to reduce surgical trauma, different minimally invasive approaches for aortic valve replacement have been developed and are now being increasingly utilized. A narrative review of the literature was carried out to describe the surgical techniques for minimally invasive aortic valve surgery and report the results from different experienced centers. Minimally invasive aortic valve replace- ment is associated with low perioperative morbidity, mortality and a low conversion rate to full sternotomy. Long-term survival appears to be at least comparable to that reported for conventional full sternotomy. Minimally invasive aortic valve surgery, either with a partial upper stemotomy or a right anterior minithoracotomy provides early- and long-term benefits. Given these benefits, it may be considered the standard of care for isolated aortic valve disease.

关键词： Aortic valve replacement Aortic valve stenosis Minimally invasive Outcomes

Aortic stenosis： insights on pathogenesis and clinical implications

在线全文

学校读者我要写书评

暂无评论

Journal of Geriatric Cardiology 2016年第6期13卷 489-498页

作者： Patrizia Carita Giuseppe Coppola Giuseppina Novo Giuseppa Caccamo Marco Guglielmo FabioBalasus Salvatore Novo Sebastiano Castrovinci Marco Moscarelli khalil fattouch Egle Corrado University Hospital Paolo Giaccone Palermo Italy Cardiac Unit Buccheri La Ferla Hospital Fatebenefratelli Palermo Italy Centro Cardiologico Monzino Milan Italy Cardiac Unit Sant'Elia Hospital Caltanissetta Italy Department of Cardiovascular Surgery GVM Care and Research Maria Eleonora Hospital Palermo Italy Department of Cardiovascular Surgery GVM Care and Research Anthea Hospital Bari Italy

Aortic stenosis （AS） is a common valvular heart disease in the Western populations, with an estimated overall prevalence of 3% in adults over 75 years. To understand its patho-biological processes represents a priority. In elderly patients, AS usually involves trileaflet valves and is referred to as degenerative calcific processes. Scientific evidence suggests the involvement of an active ＂atherosclerosis-like＂ pathogenesis in the initiation phase of degenerative AS. To the contrary, the progression could be driven by different forces （such as mechanical stress, genetic factors and interaction between inflammation and calcification）. The improved understanding presents potentially new therapeutic targets for preventing and inhibiting the development and progression of the disease. Furthermore, in clinical practice the management of AS patients implies the evaluation of generalized atherosclerotic manifestations （i.e., in the coronary and carotid arteries） even for prognostic reasons. In counselling elderly patients, the risk stratification should address individual frailty beyond the generic risk scores. In these regard, the co-morbidities, and in particular those linked to the global atherosclerotic burden, should be carefully investigated in order to define the risk/benefit ratio for invasive treatment strategies. We present a detailed overview of insights in pathogenesis of AS with possible practical implications.

关键词： Atherosclerosis Clinical implications Degenerative aortic stenosis Pathogenesis The elderly

What are the benefits of a minimally invasive approach in frail octogenarian patients undergoing aortic valve replacement？

在线全文

学校读者我要写书评

暂无评论

Journal of Geriatric Cardiology 2016年第6期13卷 514-516页

作者： Yusuf S Abdullahi Leonidas V Athanasopoulos Marco Moscarelli Roberto P Casula Giuseppe Speziale khalil fattouch Sebastiano Castrovinci Thanos Athanasiou Department of Cardiothoracic Surgery Imperial College Healthcare NHS Trust Hammersmith Hospital London UK National Heart and Lung Institute (NHLI) Imperial College London UK GVM Care & Research Unit Anthea Hospital Bari Italy Department of Surgery and Cancer Imperial College London UK GVM Care & Research Unit Maria Eleonora Hospital Palermo Italy

A best evidence topic was devised in light of a structured protocol. What is the advantage of （minl＂mally invasive） approach in （frail patients） undergoing （aortic valve replacement）？ In cardiac outpatient clinic you review an 85-year old male with severe aortic valve stenosis, low left ventricular ejection fraction and creatinine clearance of less than 50 mL/min. Other comorbidities include treated pulmonary hypertension, mild cognitive impairment, marked limitation of ordinary physical activity and depression. You resolve to determine whether to recommend mim＇mally invasive or conventional aortic valve replacement （AVR） or transcathe- ter aortic valve implantation （TAVI）, however you are not sure of the differences of the impact of frailty on preopera- tive risk for each approach; hence you investigate the best evidence on the topic.

关键词： Aortic valve stenosis Elderly patients Minimally invasive surgery Transcatheter aortic valve implantation

Surgical management of moderate ischemic mitral valve regurgitation: Where do we stand?

在线全文

学校读者我要写书评

暂无评论

World Journal of Cardiology 2014年第11期6卷 1218-1222页

作者： khalil fattouch Sebastiano Castrovinci Giacomo Murana Marco Moscarelli Giuseppe Speziale Department of Cardiovascular Surgery GVM Care and Research Maria Eleonora Hospital 90100 Palermo Italy Department of Cardiovascular Surgery University of Bologna 40138 Bologna Italy Cardiothoracic Surgery Department Hammersmith Hospital Imperial College London W12 0HS United Kingdom Department of Cardiovascular Surgery GVM Care and Research Anthea Hospital 70124 Bari Italy

Ischemic mitral regurgitation(IMR) represents a common complication after myocardial infarction. The valve is anatomically normal and the incompetence is the result of papillary muscles displacement and annular dilatation, causing leaflets tethering. Functionally the leaflets present a restricted systolic motion due to tethering forces that displaces the coaptation surface toward the left ventricle apex. The patients present poor left ventricular function at the time of surgery and the severity of the mitral regurgitation increases the risk of mortality. Currently there is general agreement to treat surgically severe IMR nevertheless strong evidences for patient with moderate insufficiency remains poor and proper treatment debated. The most effectivesurgical approach for the treatment of IMR remains debated. Some authors demonstrated that coronary artery bypass graft(CABG) alone is beneficial in patients with IMR. Conversely, in most patients, moderate IMR will persist or worsen after CABG alone which translate in higher long-term mortality as a function of residual mitral regurgitation severity. A probable reason for this unclear surgical management of functional MR is due to the contemporary suboptimal results of reparative techniques. The standard surgical treatment of chronic IMR is CABG associated with undersized annuloplasty using complete ring. Though, the recurrence of mitral regurgitation remains high(> 30%) because of continous left ventricle remodeling. To get better long term results, in the last decade, several subvalvular procedures in adjunct to mitral anuloplasty have been developed. Among them, surgical papillary muscle relocation represents the most appreciated option capable to restore normal left ventricle geometry. In the next future new preoperative predictors of increased mitral regurgitation recurrence are certainly needed to find an individual time period of treatment in each patient with moderate IMR.

关键词： Anatomy Surgery Cardiology Valve Mitral Echocardiography

Secure Channel Estimation Using Norm Estimation Model for 5G Next Generation Wireless Networks

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Computers, Materials & Continua 2025年第1期82卷 1151-1169页

作者： khalil Ullah Song Jian Muhammad Naeem Ul Hassan Suliman Khan Mohammad Babar Arshad Ahmad Shafiq Ahmad Faculty of Information Engineering and Automation Kunming University of Science and TechnologyKunming650500China Department of Computer Science Abbottabad University of Science and TechnologyHavelianAbbottabad22500Pakistan Department of Computing and Electronics Engineering Middle East CollegeMuscat124Oman Department of CS&IT Pak-Austria Fachhochschule Institute of Applied Sciences and Technology MangHaripur22621Pakistan Industrial Engineering Department College of EngineeringKing Saud UniversityRiyadh11421Saudi Arabia

The emergence of next generation networks(NextG),including 5G and beyond,is reshaping the technological landscape of cellular and mobile *** networks are sufficiently scaled to interconnect billions of users and *** in academia and industry are focusing on technological advancements to achieve highspeed transmission,cell planning,and latency reduction to facilitate emerging applications such as virtual reality,the metaverse,smart cities,smart health,and autonomous *** continuously improves its network functionality to support these *** input multiple output(MIMO)technology offers spectral efficiency,dependability,and overall performance in *** article proposes a secure channel estimation technique in MIMO topology using a norm-estimation model to provide comprehensive insights into protecting NextG network components against adversarial *** technique aims to create long-lasting and secure NextG networks using this extended *** viability of MIMO applications and modern AI-driven methodologies to combat cybersecurity threats are explored in this ***,the proposed model demonstrates high performance in terms of reliability and accuracy,with a 20%reduction in the MalOut-RealOut-Diff metric compared to existing state-of-the-art techniques.

关键词： Next generation networks massive mimo communication network artificial intelligence 5G adversarial attacks channel estimation information security

Correction:Deep Learning-Enhanced Brain Tumor Prediction via Entropy-Coded BPSO in CIELAB Color Space

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Computers, Materials & Continua 2025年第1期82卷 1461-1461页

作者： Mudassir khalil Muhammad Imran Sharif Ahmed Naeem Muhammad Umar Chaudhry Hafiz Tayyab Rauf Adham E.Ragab Department of Computer Engineering Bahauddin Zakariya UniversityMultan60000Pakistan Department of Computer Science Kansas State UniversityManhattanKS 66506USA Department of Computer Science University of Management and TechnologyLahore54000Pakistan Independent Researcher BradfordBD80HSUK Industrial Engineering Department Collage of EngineeringKing Saud UniversityP.O.Box 800Riyadh11421Saudi Arabia

In the article“Deep Learning-Enhanced Brain Tumor Prediction via Entropy-Coded BPSO in CIELAB Color Space”by Mudassir khalil,Muhammad Imran Sharif,Ahmed Naeem,Muhammad Umar Chaudhry,Hafiz Tayyab Rauf,Adham *** Computers,Materials&Continua,2023,Vol.77,No.2,pp.2031–***:10.32604/cmc.2023.043687,URL:https://***/cmc/v77n2/54831,there was an error regarding the affiliation for the author Hafiz Tayyab *** of“Centre for Smart Systems,AI and Cybersecurity,Staffordshire University,Stoke-on-Trent,ST42DE,UK”,the affiliation should be“Independent Researcher,Bradford,BD80HS,UK”.

关键词： Deep Code CIELAB

Robust Stabilization of Non-minimum Phase Switched Nonlinear Systems with Uncertainty

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Journal of Systems Science & Complexity 2020年第2期33卷 289-311页

作者： khalil Jouili Laboratory of Advanced Systems Polytechnic School of Tunisia(EPT) B.P.7432078 MarsaTunisia

This paper investigates the problem of robust stabilization of a class of switched nonlinear system with uncertain dynamics where each subsystem represents a non-minimum *** authors first construct a stabilizing sliding mode controller for each subsystem to stabilize individually its own unstable internal ***,a switching strategy is introduced to select the most appropriate diffeomorphism through an infinity of *** conditions are specifically given for the exponential stability and the exponential upper bound of the trajectory of the switched subsystem,which guarantees the global asymptotical stability of the resulting switched ***,the proposed control approach can improvemore the transient state,compared to a feedback linearization based on only one *** studies illustrate the effectiveness of the suggested approach.

关键词： Exponential stability sliding mode control switching control uncertain non-minimum phase systems

Mechanical wet-milling and subsequent consolidation of ultra-fine Al_2O_3-(ZrO_2+3%Y_2O_3) bioceramics by using high-frequency induction heat sintering

在线全文

学校读者我要写书评

暂无评论

中国有色金属学会会刊：英文版 2007年第1期17卷 21-26页

作者： khalil Abdelrazek khalil Sug Won KIM Division of Advanced Materials Engineering RIAMD Chonbuk National University

Alumina/zirconia composites were synthesized by wet-milling technique and rapid consolidation with high frequency induction heat sintering(HFIHS). The starting materials were a mixture of alumina micro-powder (80%, volume fraction) and 3YSZ nano-powders (20%). The mixtures were optimized for good sintering behaviors and mechanical properties. Nano-crystalline grains are obtained after 24 h milling. The nano-structured powder compacts are then processed to full density at different temperatures by HFIHS. Effects of temperature on the mechanical and microstructure properties were studied. Al2O3-3YSZ composites with higher mechanical properties and small grain size are successfully developed at relatively low temperatures through this technique.

关键词：生物陶瓷烧结工艺高频诱导微观结构机械性能