Results 101 to 110 of about 3,694,568 (218)

Robust Position Control of an Electro‐Hydraulic Actuator via Metaheuristic Optimization of a Fractional‐Order PID Controller

International Journal of Mechanical System Dynamics, EarlyView.
ABSTRACT In this study, a robust position control strategy is presented for a two‐stage electro‐hydraulic actuator system using a fractional‐order proportional–integral–derivative (FOPID) controller tuned by Kirchhoff's law algorithm (KLA). Electro‐hydraulic systems exhibit strong nonlinearities, parameter uncertainties, and external disturbances ...
Ridvan Firat Cinar, Davut Izci, Serdar Ekinci, Mohammad Salman, Mohammad Al‐Rabayah, Ali Akdagli, Ali Yildiz, Filiz Karaomerlioglu, Gökhan Yüksek   +8 more
wiley   +1 more source

Transapical valve-in-valve implantation for regurgitant stented aortic bioprostheses

, 2012
Transcatheter aortic valve implantation (TAVI) is rapidly evolving as an alternative treatment option for elderly patients with severe symptomatic aortic stenosis and excessive risk for surgical intervention.
Windecker, Stephan, Carrel, Thierry, Pilgrim, Thomas, Wenaweser, Peter, Kadner, Alexander, Stortecky, Stefan   +5 more
core   +1 more source

Bioprosthetic heart valve degeneration: new insights into structural remodeling and calcification

Frontiers in Cardiovascular Medicine
Bioprosthetic heart valves (BHVs) are widely used to treat aortic valve disease, and their demand is rising. However, BHV lifespan remains limited by degeneration, with patients often requiring surgical or transcatheter reintervention within a decade ...
Sydney Levy, Luisa Weiss, Rachel Cahalane, Rachel Cahalane, Bart Meuris, Elena Aikawa, Elena Aikawa   +6 more
doaj   +1 more source

Long‐Term Comparison Between Pulmonary Homograft Versus Bioprosthesis for Pulmonary Valve Replacement in Tetralogy of Fallot

Journal of the American Heart Association: Cardiovascular and Cerebrovascular Disease, 2019
Background Tetralogy of Fallot repair results in late occurrence of pulmonary regurgitation, which requires pulmonary valve replacement in a large proportion of patients.
Lucia Cocomello, Marco Meloni, Filippo Rapetto, Mai Baquedano, Maria Victoria Ordoñez, Giovanni Biglino, Chiara Bucciarelli‐Ducci, Andrew Parry, Serban Stoica, Massimo Caputo   +9 more
doaj   +1 more source

Assessing a Model for a Complex Systemic Disorder—The Value of Male Mice With a Supernumerary X Chromosome for Klinefelter Syndrome Research

Andrology, EarlyView.
ABSTRACT Introduction Direct experimental investigation of Klinefelter syndrome (KS) in patients is limited because the syndrome manifests heterogeneously and affects multiple organ systems. Studying KS therefore requires a model that captures this complexity as accurately as possible while still permitting controlled experimental manipulation ...
Fariba Saadati, Joachim Wistuba
wiley   +1 more source

Pathologic findings in pericardium and native valve tissues after aortic valve-sparing with autologous pericardial leaflet extension

, 2007
Aortic valve repair with autologous pericardial leaflet extension is a valuable treatment option for aortic valve disease. The study aim was to examine and describe the histopathologic changes in native and pericardial extension leaflet tissues after ...
Cohen, Oved, Fishbein, Michael C, De La Zerda, David J, Laks, Hillel, Calderon, Carlos A   +4 more
core   +4 more sources

Ischaemic Optic Neuropathy After Cardiac Surgery: A Systematic Review and Meta‐Analysis of Incidence and Risk Factors

ANZ Journal of Surgery, EarlyView.
Across 11 observational studies comprising 6 471 577 patients, the pooled incidence of ischaemic optic neuropathy after cardiac surgery was approximately 1.5 cases per 10 000 procedures. Coronary artery disease, peripheral vascular disease and anaemia were associated with increased odds of ION, although these findings should be interpreted in the ...
Daud Mutahar, Ammar Zaka, Amitouj S. Sidhu, Shahi Goswami, Aditi Singh, Jordan Ng, Brandon Stretton, Joshua G. Kovoor, Aashray K. Gupta, Stephen Bacchi, Weng Onn Chan, Celia Chen   +11 more
wiley   +1 more source

Longitudinal changes in bleb morphology following the PAUL Glaucoma Implant visualized using ultrasonography

Acta Ophthalmologica, EarlyView.
Abstract Purpose To evaluate bleb morphology longitudinally using sonography following glaucoma drainage device (GDD) surgery. Methods Prospective observational cohort study conducted from January 2022 to March 2024, with follow‐up up to 12 months postoperatively. Bleb morphology, including superior and inferior bleb height, transverse and longitudinal
Constance Liegl, Benjamin Aretz, Leonie Bourauel, Pascal Schipper, Carolin Deubel, Lilli Joussen, Michael Petrak, Frank G. Holz, Raffael Liegl, Karl Mercieca   +9 more
wiley   +1 more source

Premium Intraocular Lens Selection in Patients With Glaucoma: A Clinical Review

Clinical &Experimental Ophthalmology, EarlyView.
ABSTRACT Glaucoma frequently coexists with cataract, but glaucomatous functional loss, ocular‐surface disease, anatomical abnormalities, and treatment‐related refractive variability may reduce tolerance of premium intraocular lenses. This narrative review critically appraises evidence relevant to lens selection in glaucoma. Central visual‐field status,
Zhihao Liu, Yajuan Zheng, Mingxuan Wang, Jing Zhao   +3 more
wiley   +1 more source

Cardiac structure and function in psoriasis: A cross‐sectional analysis of the PSOCADIA study

Journal of the European Academy of Dermatology and Venereology, EarlyView.
Individuals with well‐treated psoriasis exhibited a higher burden of myocardial dysfunction (GLS < 16%) compared with controls, independent of cardiometabolic comorbidity. The prevalence was similar across psoriasis severity, highlighting the importance of cardiovascular assessment in all patients with psoriasis. Abstract Background Psoriasis is linked
Maria Dons, Morten Sengeløv, Kristoffer Grundtvig Skaarup, Niklas Dyrby Johansen, Mats C. H. Lassen, Sofie Bøgh‐Sørensen, Filip Soeskov Davidovski, Julie Borchsenius, Peter Schnohr, Gorm Boje Jensen, Rasmus Møgelvang, Christoffer V. Nissen, Peter Riis Hansen, Brittany N. Weber, Claus Zachariae, Lone Skov, Tor Biering‐Sørensen   +16 more
wiley   +1 more source