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Self-expanding valve

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https://www.readbyqxmd.com/read/28643214/new-generation-devices-for-transfemoral-transcatheter-aortic-valve-replacement-are-superior-compared-with-last-generation-devices-with-respect-to-varc-2-outcome
#1
Julia Seeger, Birgid Gonska, Wolfgang Rottbauer, Jochen Wöhrle
New generation devices for transcatheter aortic valve replacement have been optimized to improve clinical outcome. We compared procedural, in-hospital, 30 days and 12 months outcome of the new generation repositionable Boston Lotus Valve and the balloon-expandable Edwards Sapien 3 valve with the last generation self-expandable Medtronic CoreValve and the balloon-expandable Edwards Sapien XT. Between 2010 and 2015 consecutive patients treated with the Medtronic CoreValve (N = 100), Edwards Sapien XT (N = 100), Edwards Sapien S3 (N = 100) and Boston Lotus device (N = 100) were enrolled...
June 22, 2017: Cardiovascular Intervention and Therapeutics
https://www.readbyqxmd.com/read/28633375/final-5-year-clinical-and-echocardiographic-results-for-treatment-of-severe-aortic-stenosis-with-a-self-expanding-bioprosthesis-from-the-advance-study
#2
Ulrich Gerckens, Corrado Tamburino, Sabine Bleiziffer, Johan Bosmans, Peter Wenaweser, Stephen Brecker, Jia Guo, Axel Linke
Aims: The ADVANCE study was designed to evaluate the safety and effectiveness of transcatheter aortic valve implantation (TAVI) with a self-expanding bioprosthesis in real-world patients with symptomatic, severe aortic stenosis at high surgical risk for valve replacement. Methods and results: Study participants were enrolled from 44 experienced centres in 12 countries. Patient eligibility, treatment approach, and choice of anaesthesia were determined by the local Heart Team...
June 13, 2017: European Heart Journal
https://www.readbyqxmd.com/read/28633263/structural-valve-deterioration-of-a-subcoronary-implanted-stentless-bioprosthesis-how-to-treat
#3
Eva Karolina Harmel, Lenard Conradi, Ulrich Schäfer, Florian Deuschl, Niklas Schofer, Stefan Blankenberg, Hermann Reichenspurner, Evaldas Girdauskas
We present a case of transcatheter valve-in-valve replacement performed because of structural valve deterioration of a subcoronary implanted stentless aortic bioprosthesis. A 23-mm self-expandable transcatheter heart valve (THV) with supraannular seating was chosen. The procedure was performed with the patient under conscious sedation. After anchoring and partial valve deployment, the patient experienced an acute onset of angina. The angiogram showed left main coronary artery obstruction. Prompt resheathing and retrieval of the THV was performed, and the procedure was aborted...
July 2017: Annals of Thoracic Surgery
https://www.readbyqxmd.com/read/28625366/feasibility-of-transcatheter-aortic-valve-replacement-in-low-risk-patients-with-symptomatic-severe-aortic-stenosis-rationale-and-design-of-the-low-risk-tavr-lrt-study
#4
Toby Rogers, Rebecca Torguson, Roshni Bastian, Paul Corso, Ron Waksman
BACKGROUND: Safety and effectiveness of transcatheter aortic valve replacement (TAVR) in low-risk patients with symptomatic severe aortic stenosis have not yet been established. HYPOTHESIS: Transcatheter aortic valve replacement is feasible in patients with symptomatic severe aortic stenosis and low risk for surgical aortic valve replacement. DESIGN: The LRT study is the first US Food and Drug Administration-approved Investigational Device Exemption prospective multicenter feasibility trial of TAVR in low-risk patients...
July 2017: American Heart Journal
https://www.readbyqxmd.com/read/28622944/effect-of-ascending-aortic-dimension-on-acute-procedural-success-following-self-expanding-transcatheter-aortic-valve-replacement-a-multicenter-retrospective-analysis
#5
Yoshio Maeno, Sung-Han Yoon, Yigal Abramowitz, Yusuke Watanabe, Hasan Jilaihawi, Mao-Shin Lin, Jason Chan, Rahul Sharma, Hideyuki Kawashima, Sharjeel Israr, Hiroyuki Kawamori, Masaki Miyasaka, Tanya Rami, Yoshio Kazuno, Geeteshwar Mangat, Mohammad Kashif, Tarun Chakravarty, Hsien-Li Kao, Michael Kang-Yin Lee, Mamoo Nakamura, Ken Kozuma, Wen Cheng, Raj R Makkar
AIMS: Self-expanding (SE) valves are characterized with long stent frame design and the radial force of the device exists both in the inflow and outflow level. Therefore, we hypothesized that device success of SE-valves may be influenced by ascending aortic dimensions (AAD). The aim of this study was to determine the influence of AAD on acute device success rates following SE transcatheter aortic valve replacement (TAVR). METHODS & RESULTS: In 4 centers in the United States and Asia, 214 consecutive patients underwent SE-TAVR...
June 3, 2017: International Journal of Cardiology
https://www.readbyqxmd.com/read/28616543/transcatheter-aortic-valve-implantation-with-the-new-generation-evolut-r%C3%A2-comparison-with-corevalve%C3%A2-in-a-single-center-cohort
#6
Eberhard Schulz, Alexander Jabs, Tommaso Gori, Stephan von Bardeleben, Ulrich Hink, Walter Kasper-König, Christian Friedrich Vahl, Thomas Münzel
BACKGROUND: The Medtronic Evolut R (EVR) is a novel transcatheter heart valve designed to allow precise implantation at the intended position and to minimize prosthesis dysfunction as well as procedural complications. Our aim was to compare short-term functional and clinical outcomes of the new EVR with the established Medtronic CoreValve (CV) system. METHODS AND RESULTS: Of 151 patients undergoing transfemoral transcatheter aortic valve implantation with a self-expanding valve at our institution between January 2013 and January 2016, 86 were treated with EVR and 65 with CV...
September 2016: IJC Heart & Vasculature
https://www.readbyqxmd.com/read/28595747/transcathether-aortic-valve-implantation-with-the-new-repositionable-self-expandable-evolut-r-versus-corevalve-system-a-case-matched-comparison
#7
Cristina Giannini, Marco De Carlo, Corrado Tamburino, Federica Ettori, Azeem M Latib, Francesco Bedogni, Giuseppe Bruschi, Patrizia Presbitero, Arnaldo Poli, Franco Fabbiocchi, Roberto Violini, Carlo Trani, Pietro Giudice, Marco Barbanti, Marianna Adamo, Paola Colombo, Susanna Benincasa, Mauro Agnifili, A Sonia Petronio
BACKGROUND: Despite promising results following transcatheter aortic valve implantation (TAVI), several relevant challenges still remain. To overcome these issues, new generation devices have been developed. The purpose of the present study was to determine whether TAVI with the new self-expanding repositionable Evolut R offers potential benefits compared to the preceding CoreValve, using propensity matching. METHODS: Between June 2007 and November 2015, 2148 consecutive patients undergoing TAVI either CoreValve (n=1846) or Evolut R (n=302) were prospectively included in the Italian TAVI ClinicalService® project...
May 29, 2017: International Journal of Cardiology
https://www.readbyqxmd.com/read/28579166/transfemoral-aortic-valve-implantation-using-a-self-expanding-transcatheter-heart-valve-without-pre-dilation
#8
Won-Keun Kim, Christoph Liebetrau, Matthias Renker, Andreas Rolf, Arnaud Van Linden, Mani Arsalan, Oliver Husser, Helge Möllmann, Christian Hamm, Thomas Walther
No abstract text is available yet for this article.
May 27, 2017: International Journal of Cardiology
https://www.readbyqxmd.com/read/28571486/repositionable-self-expanding-aortic-bioprosthesis
#9
Bruna Gomes, Hugo A Katus, Raffi Bekeredjian
Transcatheter aortic valve implantation/replacement (TAVI or TAVR) has been established as a first line therapy in patients with symptomatic severe aortic stenosis (AS) at high or prohibitive surgical risk and as an alternative in elderly patients with intermediate surgical risk. Since its first-in-human procedure in 2002, the past 15-years have shown rapid developments in TAVI technology with the introduction and further improvement of new transcatheter heart valves (THV). Areas covered: There are currently several THV systems available, based on balloon-expandable, self-expandable or other technologies...
June 14, 2017: Expert Review of Medical Devices
https://www.readbyqxmd.com/read/28570236/transcatheter-aortic-valve-replacement-versus-surgical-valve-replacement-in-low-intermediate-surgical-risk-patients-a-systematic-review-and-meta-analysis
#10
Aakash Garg, Sunil V Rao, Gautam Visveswaran, Sahil Agrawal, Abhishek Sharma, Lohit Garg, Indrajeet Mahata, Jalaj Garg, Dinesh Singal, Marc Cohen, John B Kostis
BACKGROUND: Transcatheter aortic valve replacement (TAVR) is a viable alternative to surgical aortic valve replacement (SAVR) in patients with severe aortic stenosis (SAS) who are at high risk for surgery. We sought to evaluate the outcomes of TAVR vs SAVR in low-intermediate risk patients with SAS. METHODS AND RESULTS: We performed random-effects meta-analysis of randomized controlled trials (RCTs) and propensity-matched observational studies comparing TAVR vs SAVR for low-intermediate risk patients...
June 2017: Journal of Invasive Cardiology
https://www.readbyqxmd.com/read/28544829/symetis-tf-acurateneo%C3%A2-valve-in-valve-a-new-indication-for-another-self-expanding-tavi-prosthesis
#11
Elton Pllaha, Paolo Pagnotta, Marco Rossi, Bernhard Reimers
During the past decade there has been a major shift in the use of surgical bioprostheses. Consequently, due to the increasing age of the population there will be a major increase in the incidence of failure of these prostheses. While mortality associated with the re-replacement of surgical valve failures remains high, advances in transcatheter interventions have permitted the use of transcatheter valves in degenerative surgical bioprostheses. Herein is described the first use of the Symetis transfemoral ACURATEneo™ valve-in-valve procedure, together with details of the associated technical challenges...
January 2017: Journal of Heart Valve Disease
https://www.readbyqxmd.com/read/28540072/standard-imaging-techniques-in-transcatheter-aortic-valve-replacement
#12
REVIEW
Arash Salemi, Berhane M Worku
Transcatheter aortic valve replacement (TAVR) has become a widely accepted therapeutic option for patients with severe, symptomatic aortic stenosis at intermediate, high, or extreme risk for conventional surgery as determined through a heart team approach. Two valve prostheses are currently available and the Food and Drug Administration (FDA) approved in the United States for TAVR: the self-expandable Medtronic CoreValve (Medtronic, Inc., Minneapolis, MN, USA) and the balloon-expandable Edwards Sapien Valve (Edwards Lifesciences, Irvine CA, USA)...
April 2017: Journal of Thoracic Disease
https://www.readbyqxmd.com/read/28525672/testing-of-a-novel-percutaneous-temporary-aortic-valve-in-a-rabbit-model-of-acute-severe-aortic-regurgitation-an-experimental-study
#13
Paul C Ho
PURPOSE: Device management of hemodynamic instability due to acute aortic regurgitation is not available. A novel, catheter-based, temporary aortic valve (TAV) has been in development. Early prototypes (balloon-based TAV) have undergone proof-of-concept studies in mathematical, bench and animal models. The redesigned membrane-based TAV prototype is evaluated in a rabbit model of acute severe aortic regurgitation. METHODS: Acute aortic regurgitation was simulated by deploying a self-expanding endovascular stent across the aortic annulus...
May 18, 2017: International Journal of Artificial Organs
https://www.readbyqxmd.com/read/28521921/1-year-results-in-patients-undergoing-transcatheter-aortic-valve-replacement-with-failed-surgical-bioprostheses
#14
G Michael Deeb, Stanley J Chetcuti, Michael J Reardon, Himanshu J Patel, P Michael Grossman, Theodore Schreiber, John K Forrest, Tanvir K Bajwa, Daniel P O'Hair, George Petrossian, Newell Robinson, Stanley Katz, Alan Hartman, Harold L Dauerman, Joseph Schmoker, Kamal Khabbaz, Daniel R Watson, Steven J Yakubov, Jae K Oh, Shuzhen Li, Neal S Kleiman, David H Adams, Jeffrey J Popma
OBJECTIVES: This study evaluated the safety and effectiveness of self-expanding transcatheter aortic valve replacement (TAVR) in patients with surgical valve failure (SVF). BACKGROUND: Self-expanding TAVR is superior to medical therapy for patients with severe native aortic valve stenosis at increased surgical risk. METHODS: The CoreValve U.S. Expanded Use Study was a prospective, nonrandomized study that enrolled 233 patients with symptomatic SVF who were deemed unsuitable for reoperation...
May 22, 2017: JACC. Cardiovascular Interventions
https://www.readbyqxmd.com/read/28495211/maximum-aortic-valve-opening-phase-for-annulus-sizing-in-pre-tavr-cta
#15
Nam Ju Lee, Saurabh Jha, Bong Ju Lee, Harold Litt
RATIONALE AND OBJECTIVES: The optimal phase for the measurement of the aortic annular area for transcatheter aortic valve replacement (TAVR) is not standardized, although most agree that systolic measurements are preferred, when the annulus is larger. We hypothesized that the maximum annular area occurs at the cardiac phase of the maximum aortic valve opening (MAVO) and that this phase can be accurately and reproducibly assessed by visual inspection only. MATERIALS AND METHODS: The aortic valve opening area was inspected visually by two readers to determine the MAVO phase...
May 8, 2017: Academic Radiology
https://www.readbyqxmd.com/read/28493389/contemporary-transcatheter-aortic-valve-replacement-with-third-generation-balloon-expandable-versus-self-expanding-devices
#16
Toby Rogers, Arie Steinvil, Kyle Buchanan, M Chadi Alraies, Edward Koifman, Jiaxiang Gai, Rebecca Torguson, Petros Okubagzi, Itsik Ben-Dor, Augusto Pichard, Lowell Satler, Ron Waksman
OBJECTIVES: To evaluate balloon-expandable and self-expanding third-generation transcatheter aortic valve replacement (TAVR) devices according to patient selection criteria and outcomes. BACKGROUND: Two competing third-generation TAVR technologies are currently commercially available in the US. There are no published head-to-head comparisons of the relative performance of these two devices. METHODS: 257 consecutive patients undergoing TAVR with a third-generation balloon-expandable (Edwards Sapien 3) or self-expanding device (Medtronic CoreValve Evolut R) at a single US medical center were included...
May 11, 2017: Journal of Interventional Cardiology
https://www.readbyqxmd.com/read/28483264/transcatheter-aortic-valve-insertion-after-previous-mitral-valve-operation
#17
Kevin L Greason, Gurpreet S Sandhu, Vuyisile T Nkomo, Katherine S King, David L Joyce, Eric E Williamson, David R Holmes
OBJECTIVE: There are limited data on transcatheter aortic valve insertion after previous mitral valve operation. To better understand the associated procedural risks, we reviewed our single-center experience. METHODS: We retrospectively reviewed the records of 772 consecutive patients who received transcatheter aortic valve insertion from November 2008 through August 2016. There were 18 (2%) patients who had previous mitral valve operation that included valve repair in 4 patients (22%) and replacement in 14 (78%)...
April 4, 2017: Journal of Thoracic and Cardiovascular Surgery
https://www.readbyqxmd.com/read/28482354/nose-cone-entrapment-after-transcatheter-aortic-valve-implantation-of-a-corevalve-self-expandable-bioprosthesis
#18
Stylianos A Pyxaras, Luciano Pizzulli, Ulrich Gerckens
: We describe the first reported case of a nose cone entrapment of the delivering catheter of a CoreValve self-expandable valve, during a transcatheter aortic valve implantation procedure. The complication was successfully treated after snaring the cone and retracting the system within the introducing sheath.
December 2016: Journal of Cardiovascular Medicine
https://www.readbyqxmd.com/read/28449479/early-results-of-the-sorin-%C3%A2-perceval-s-sutureless-valve-systematic-review-and-meta-analysis
#19
Karan Sian, Sheila Li, Daneish Selvakumar, Ross Mejia
BACKGROUND: Minimally invasive aortic valve replacement (MAVR) has demonstrated a benefit with respect to increased patient satisfaction due to minimised pain and earlier recovery. Sutureless valves may benefit MAVR and conventional aortic valve replacement (AVR) by reducing operative times and blood transfusion requirements. The Perceval valve (Sorin, Salluggia, Italy) is a self-expanding prosthesis made from bovine pericardium mounted in a nitinol stent, designed to simplify the implantation of an aortic valve...
March 2017: Journal of Thoracic Disease
https://www.readbyqxmd.com/read/28427320/the-role-of-inelastic-deformations-in-the-mechanical-response-of-endovascular-shape-memory-alloy-devices
#20
Lorenza Petrini, Alessandro Bertini, Francesca Berti, Giancarlo Pennati, Francesco Migliavacca
Nickel-titanium alloys are commonly adopted for producing cardiovascular minimally invasive devices such as self-expandable stents, aortic valves and stent-grafts. These devices are subjected to cyclic loads (due to blood pulsatility, leg or heart movements), that can induce fatigue fracture, and may also be subjected to very large deformations (due to crimping procedure, a tortuous physiological path or overloads), that can induce material yield. Recently, the authors developed a new constitutive model that considers inelastic strains due to not-completed reverse phase transformation (not all the stress-induced martensite turns back to austenite) or/and plasticity and their accumulation during cyclic loads...
May 2017: Proceedings of the Institution of Mechanical Engineers. Part H, Journal of Engineering in Medicine
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