Results 11 to 20 of about 448,899 (312)

Valve in valve and valve in ring transcatheter aortic valveimplantation

Bulgarian Cardiology, 2022
In recent years the trend towards surgical bioprosthetic valve implantation, especially among young patients, has increased in order to avoid anticoagulant therapy. The patient’s age remains one of the leading risk factors for valve dysfunction.
P. Simeonov, B. Barzashka, D. Trendafilova, J. Jorgova, D. Petkov, P. Abedinov   +5 more
openaire   +3 more sources

Valve in Valve [PDF]

Circulation, 2012
The first mechanical heart valve prosthesis, designed by Dr Charles Hufnagel, was implanted to the descending aorta of a 30-year-old woman with severe aortic regurgitation in 1952.1 Eight years after the initial successful prosthetic valve implantation, Dr Harken sutured a prosthetic valve (Starr Edwards Valve) to the aortic annulus after removing the ...
E Murat, Tuzcu, Samir R, Kapadia, Lars G, Svensson   +2 more
openaire   +2 more sources

Transfemoral transcatheter valve-in-valve-in-valve replacement [PDF]

The Journal of Thoracic and Cardiovascular Surgery, 2016
From the Divisions of Cardiovascular Surgery and Cardiovascular Medicine, Perelman School of Medicine, University of Pennsylvania, Philadelphia, Pa. Disclosures: Authors have nothing to disclose with regard to commercial support. Received for publication Dec 16, 2015; revisions received Feb 11, 2016; accepted for publicationMarch 14, 2016; available ...
Stephane, Leung Wai Sang, Jay, Giri, Prashanth, Vallabhajosyula   +2 more
openaire   +2 more sources

Outcomes in Valve-in-Valve Transcatheter Aortic Valve Implantation

The American Journal of Cardiology, 2022
The use of valve-in-valve transcatheter aortic valve implantation (ViV-TAVI) is increasing, but studies evaluating clinical outcomes in these patients are scarce. Also, there are limited data to guide the choice of valve type in ViV-TAVI. Therefore, this CENTER-study evaluated clinical outcomes in patients with ViV-TAVI compared to patients with native
Astrid C. van Nieuwkerk, Raquel B. Santos, Eduard Fernandez-Nofrerias, Didier Tchétché, Fabio S. de Brito, Marco Barbanti, Ran Kornowski, Azeem Latib, Augusto D'Onofrio, Flavio Ribichini, Vicente Mainar, Nicolas Dumonteil, Jan Baan, Alexandre Abizaid, Samantha Sartori, Paola D'Errigo, Giuseppe Tarantini, Mattia Lunardi, Katia Orvin, Matteo Pagnesi, Garikoitz Lasa Larraya, Angie Ghattas, George Dangas, Roxana Mehran, Ronak Delewi   +24 more
openaire   +6 more sources

A calcified polymeric valve for valve-in-valve applications [PDF]

Journal of Biomechanics, 2017
The prevalence of aortic valve stenosis (AS) is increasing in the aging society. More recently, novel treatments and devices for AS, especially transcatheter aortic valve replacement (TAVR) have significantly changed the therapeutic approach to this disease.
Falahatpisheh, Ahmad, Morisawa, Daisuke, Toosky, Taraz T, Kheradvar, Arash   +3 more
openaire   +3 more sources

Valve in Valve in Valve

JACC: Case Reports, 2019
A female patient presented with severe, symptomatic aortic stenosis after distant surgical aortic valve replacement and subsequent transcatheter aortic valve implantation 6 years prior. A 23-mm CoreValve Evolut (Medtronic, Dublin, Ireland) was implanted with excellent symptomatic and hemodynamic results. (Level of Difficulty: Advanced.).
Brian J. Grondahl, DO, Gaurav Dhar, MD
openaire   +3 more sources

Mid-term results of mitral valve repair using flexible bands versus complete rings in patients with degenerative mitral valve disease: a prospective, randomized study

Journal of Cardiothoracic Surgery, 2017
Background We aimed to compare the outcomes of mitral valve repair with flexible band (FB) versus complete semirigid ring (SR) in degenerative mitral valve disease patients.
Alexandr V. Bogachev-Prokophiev, Alexandr V. Afanasyev, Sergei I. Zheleznev, Vladimir M. Nazarov, Ravil M. Sharifulin, Alexandr M. Karaskov   +5 more
doaj   +1 more source

India’s first transcatheter mitral valve implantation: Mitral valve-in-valve via transapical approach

IHJ Cardiovascular Case Reports, 2018
Valve-in-valve implantation for dysfunctional bioprosthetic valves has been shown to be a safe and feasible option for selected patients (Dvir et al., 2014, Bapat et al., 2012, Piazza et al., 2011).
A.B. Gopalamurugan, Y. Vijaya Chandra Reddy, R. Mohamed Abubacker, D. Karthikeyan, S. Vijay Shankar   +4 more
doaj   +1 more source

Analysis of proportional valve flow field in common rail system

The Journal of Engineering, 2020
A certain type of proportional valve has been optimised in design by adding a damping hole in its structure, which solves the problem of pressure rise in the fuel chamber due to gap leakage when closing.
Li Yazhou, Huang Du, Fu Jian, Zhang Guihu, Wang Kang, Xu Hui, Chen Sirui   +6 more
doaj   +1 more source

Scaling properties of a low-actuation pressure microfluidic valve [PDF]

, 2004
Using basic physical arguments, we present a design and method for the fabrication of microfluidic valves using multilayer soft lithography. These on-off valves have extremely low actuation pressures and can be used to fabricate active functions, such as
Anna Pandolfi, Giao Hang, Groisman A., Grover W. H., Hansen C. L., Kane C., Michael Ortiz, Pandolfi A., Stephen R. Quake, Vincent Studer, W. French Anderson   +10 more
core   +1 more source