Results 41 to 50 of about 130,598 (314)

Transcatheter Aortic Valve Replacement [PDF]

Circulation, 2011
Case History: A 77-year-old man presents with fatigue and shortness of breath with minimal exertion. He is brought into the examination room in a wheelchair due to shortness of breath with ambulation. He has a history of hypertension, diabetes mellitus, and coronary artery disease with prior stent to left anterior descending artery.
Frederick G P, Welt, Michael J, Davidson, Martin B, Leon, Andrew C, Eisenhauer   +3 more
openaire   +2 more sources

Double Helical Plasmonic Antennas

Advanced Functional Materials, EarlyView.
Plasmonic double helical antennas funnel circularly polarized light to the nanoscale, offering strong chiroptical interaction and directional light emission. Extending a single helix design tool, this study combines numerical modeling with experimental validation, revealing large, broadband dissymmetry factors in the visible range.
Aleksei Tsarapkin, Luka Zurak, Krzysztof Maćkosz, Lorenz Löffler, Victor Deinhart, Ivo Utke, Thorsten Feichtner, Katja Höflich   +7 more
wiley   +1 more source

Massive TAVR

JACC: Case Reports, 2020
A 65-year-old woman with a large adnexal mass was found to have severe bicuspid aortic valve stenosis. Transcatheter aortic valve replacement was chosen rather than surgical aortic valve replacement because of concerns over risks.
Siddharth Chauhan, MD, Simbo Chiadika, MD, Tariq Dayah, MD, Sam Chitsaz, MD, Prakash Balan, MD, JD   +4 more
doaj   +1 more source

CO2 Reduction on Copper‐Nitrogen‐Doped Carbon Catalysts Tuned by Pulsed Potential Electrolysis: Effect of Pulse Potential

Advanced Functional Materials, EarlyView.
This study demonstrates that pulsed potential electrolysis significantly improves CO2 reduction performance on copper‐nitrogen doped carbon electrodes. The formation of cationic copper sites and metallic clusters as a function of applied intermittent potential leads to notable selectivity changes compared to potentiostatic reduction.
Dorottya Hursán, Janis Timoshenko, Andrea Martini, Hyo Sang Jeon, Eduardo Ortega, Martina Rüscher, Arno Bergmann, Aram Yoon, Uta Hejral, Antonia Herzog, Clara Rettenmaier, Felix T. Haase, Philipp Grosse, Beatriz Roldan Cuenya   +13 more
wiley   +1 more source

Transcatheter aortic valve replacement valve in transcatheter aortic valve replacement valve for severe periprosthetic regurgitation

Heart Views, 2020
The management of postprocedure severe aortic periprosthetic regurgitation after transcatheter aortic valve replacement (TAVR) is unknown. While valve-in-valve TAVR has been associated with favorable outcomes for degenerative surgically implanted bioprosthetic valves, there are no evidence-based guidelines for immediate TAVR valve in TAVR valve for ...
Sneha Nandy, Siu-Hin Wan, Kyle Klarich
openaire   +3 more sources

Smart, Bio‐Inspired Polymers and Bio‐Based Molecules Modified by Zwitterionic Motifs to Design Next‐Generation Materials for Medical Applications

Advanced Functional Materials, EarlyView.
Bio‐based and (semi‐)synthetic zwitterion‐modified novel materials and fully synthetic next‐generation alternatives show the importance of material design for different biomedical applications. The zwitterionic character affects the physiochemical behavior of the material and deepens the understanding of chemical interaction mechanisms within the ...
Theresa M. Lutz, Jonas De Breuck, Sahar Salehi, Meike N. Leiske   +3 more
wiley   +1 more source

Machine Learning-Based Predictive Model of Aortic Valve Replacement Modality Selection in Severe Aortic Stenosis Patients

Medical Sciences, 2023
The current recommendation for bioprosthetic valve replacement in severe aortic stenosis (AS) is either surgical aortic valve replacement (SAVR) or transcatheter aortic valve replacement (TAVR).
Ronpichai Chokesuwattanaskul, Aisawan Petchlorlian, Piyoros Lertsanguansinchai, Paramaporn Suttirut, Narut Prasitlumkum, Suphot Srimahachota, Wacin Buddhari   +6 more
doaj   +1 more source

Aortic Valve Replacement

The Journal of ExtraCorporeal Technology, 1990
Indications for aortic valve replacement can be summarized into two disease processes, moderate to severe aortic stenosis (with or without symptoms) and moderate to severe aortic insufficiency. Fortunately, standards of care differ with each physician and so indications for aortic valve replacement are not clearly defined. To understand how the surgeon
openaire   +2 more sources

Ice Lithography: Recent Progress Opens a New Frontier of Opportunities

Advanced Functional Materials, EarlyView.
This review focuses on recent advancements in ice lithography, including breakthroughs in compatible precursors and substrates, processes and applications, hardware, and digital methods. Moreover, it offers a roadmap to uncover innovation opportunities for ice lithography in fields such as biological, nanoengineering and microsystems, biophysics and ...
Bingdong Chang, Gwendoline A. E. Anand, Rubaiyet Haque, Dylan A. Chiaro, Mona Sharma, Andrew R. Williams, Frank Niklaus, Daryl W. Yee, Gavin M. King, Anpan Han   +9 more
wiley   +1 more source

Advances in Transcatheter Electrosurgery for Treating Valvular Heart Disease

US Cardiology Review, 2021
Delivery of electrosurgery energy through catheters and guidewires enables interventionists to ‘cut’ through obstructive intravascular lesions or across cardiac chambers.
Jaffar M Khan, Toby Rogers, Adam B Greenbaum, Vasilis C Babaliaros, John C Lisko, Dursun Korel Yildirim, Christopher G Bruce, Daniel A Herzka, Kanishka Ratnayaka, Robert J Lederman   +9 more
doaj   +1 more source