keyword
MENU ▼
Read by QxMD icon Read
search

Valve durability

keyword
https://www.readbyqxmd.com/read/28936594/transcatheter-aortic-valve-replacement-outcomes-indications-complications-and-innovations
#1
REVIEW
Michael N Young, Ignacio Inglessis
Transcatheter aortic valve replacement (TAVR) has become the standard of care for the treatment of severe aortic stenosis in individuals who are at prohibitive surgical risk and presents a viable alternative to surgery in selected patients who are at high operative risk. To date, outcomes from the PARTNER (Placement of AoRtic TraNscathetER Valve) and Medtronic CoreValve® US Pivotal trials continue to show the benefits of TAVR in these high-risk subgroups out to 5 and 3 years, respectively (as reported by Mack et al...
September 22, 2017: Current Treatment Options in Cardiovascular Medicine
https://www.readbyqxmd.com/read/28935509/aortic-valve-replacement-are-we-spoiled-for-choice
#2
Mohamad Bashir, Amer Harky, David Bleetman, Benjamin Adams, Neil Roberts, Damian Balmforth, John Yap, Kulvinder Lall, Alex Shipolini, Aung Oo, Rakesh Uppal
Management of aortic valve disease and, in particular, aortic valve stenosis has evolved through the course of time from medical management and balloon valvuloplasty to the presumed gold-standard surgical intervention. However, with the advent of surgical innovation, intra- and postoperative patients monitoring, understanding of hemodynamic dysfunction, and choices of prosthesis, conventional surgical aortic valve replacements are currently being challenged in particular in moderate- and high-risk patients...
August 18, 2017: Seminars in Thoracic and Cardiovascular Surgery
https://www.readbyqxmd.com/read/28918516/valve-sparing-aortic-root-surgery-con-remodeling
#3
Takashi Kunihara
The two major valve-sparing root replacement procedures, aortic valve reimplantation (reimplantation) and aortic root remodeling (remodeling), have advantages and disadvantages, which are reviewed herein. The main advantage of reimplantation is the resulting annular support, and the disadvantages are the unfavorable hemodynamics and relatively long procedure time. The main advantages of remodeling are the physiological hemodynamics and decreased procedure time, and the disadvantage is the lack of annular support...
September 16, 2017: General Thoracic and Cardiovascular Surgery
https://www.readbyqxmd.com/read/28903992/importance-of-the-valve-durability-life-expectancy-ratio-in-selection-of-a-prosthetic-aortic-valve
#4
EDITORIAL
Rodrigo Bagur, Philippe Pibarot, Catherine M Otto
No abstract text is available yet for this article.
September 13, 2017: Heart: Official Journal of the British Cardiac Society
https://www.readbyqxmd.com/read/28895294/pathology-of-self-expanding-transcatheter-aortic-valves-findings-from-the-corevalve-us-pivotal-trials
#5
Kazuyuki Yahagi, Sho Torii, Elena Ladich, Robert Kutys, Maria E Romero, Hiroyoshi Mori, Frank D Kolodgie, Jeffrey J Popma, Renu Virmani, Aloke V Finn
BACKGROUND: Transcatheter aortic valve replacement (TAVR) has recently become an alternative to surgical aortic valve replacement for patients with severe aortic stenosis. However, paravalvular leaks, possible leaflet thrombosis, and device durability following TAVR remain unresolved issues. METHODS AND RESULTS: We conducted the first systematic microscopic and macroscopic pathologic analysis of self-expanding CoreValve transcatheter aortic valves removed at autopsy or surgically from the U...
September 12, 2017: Catheterization and Cardiovascular Interventions
https://www.readbyqxmd.com/read/28890465/hemodynamics-of-pericardial-aortic-valves-contemporary-stented-versus-stentless-valves-in-a-matched-comparison
#6
Torsten Christ, Sebastian Holinski, Konstantin Zhigalov, Christina Barbara Zielinski, Herko Grubitzsch
PURPOSE: Hemodynamic performance of aortic valve bioprostheses is essential for reliable function and durability. So far, the supra-annularly implanted stentless Sorin Freedom Solo (SFS) demonstrated unsurpassed hemodynamic properties. As contemporary stented and externally mounted pericardial bioprostheses, like the Labcor Dokimos Plus (LDP), also improve hemodynamic performance, these types of valves were compared in this study. METHODS: A total of 218 patients, who underwent aortic valve replacement with the LDP or the SFS, were matched retrospectively 1:1 on variables affecting hemodynamic measurements: implanted valve size, age, sex, and body surface area (BSA)...
September 8, 2017: Annals of Thoracic and Cardiovascular Surgery
https://www.readbyqxmd.com/read/28885112/management-of-failing-bioprosthesis-in-elderly-patients-who-have-undergone-transcatheter-aortic-valve-replacement
#7
Ozan M Demir, Neil Ruparelia, Angela Frame, Sayan Sen, Ghada W Mikhail, Michael Fertleman, Iqbal S Malik
Transcatheter aortic valve replacement (TAVR) has revolutionized the treatment of symptomatic aortic stenosis. The number of TAVR procedures is expected to increase exponentially in the next decade. Therefore, patients will inevitably present with signs and symptoms attributable to TAVR bioprosthesis failure many years after an acutely successful procedure. Their management will become increasing important moving forward. Areas covered: The aim of this article is to review the causes of bioprosthesis failure and outline optimal management strategies in elderly patients...
September 15, 2017: Expert Review of Medical Devices
https://www.readbyqxmd.com/read/28874031/standardized-definitions-of-structural-deterioration-and-valve-failure-in-assessing-long-term-durability-of-transcatheter-and-surgical-aortic-bioprosthetic-valves-a-consensus-statement-from-the-european-association-of-percutaneous-cardiovascular-interventions
#8
Davide Capodanno, Anna S Petronio, Bernard Prendergast, Helene Eltchaninoff, Alec Vahanian, Thomas Modine, Patrizio Lancellotti, Lars Sondergaard, Peter F Ludman, Corrado Tamburino, Nicolò Piazza, Jane Hancock, Julinda Mehilli, Robert A Byrne, Andreas Baumbach, Arie Pieter Kappetein, Stephan Windecker, Jeroen Bax, Michael Haude
No abstract text is available yet for this article.
September 1, 2017: European Journal of Cardio-thoracic Surgery
https://www.readbyqxmd.com/read/28838100/long-term-results-of-the-mitroflow-aortic-pericardial-bioprosthesis-in-over-800-patients-limited-durability-and-mechanisms-of-dysfunction
#9
Fabio Ius, Julia Schulz, Mazen Roumieh, Felix Fleissner, Issam Ismail, Igor Tudorache, Gregor Warnecke, Andreas Martens, Malakh Shrestha, Dietmar Boethig, Axel Haverich, Serghei Cebotari
OBJECTIVES: The Mitroflow aortic pericardial bioprosthesis was widely employed in the past. However, some authors have recently reported early structural valve deterioration (SVD) of the Mitroflow LA/LXA model. Thus, we reviewed our experience with the Mitroflow bioprosthesis and studied the risk factors for SVD and mortality. METHODS: Records of patients who underwent aortic valve replacement with a Mitroflow bioprosthesis between November 2005 and January 2015 were retrospectively evaluated with Kaplan-Meier, Cox-regression and multistate analysis...
August 1, 2017: European Journal of Cardio-thoracic Surgery
https://www.readbyqxmd.com/read/28833594/perceval-valve-in-valve-implant-for-full-root-xenograft-failure
#10
Giovanni A Chiariello, Emmanuel Villa, Antonio Messina, Margherita Dalla Tomba, Marco Cirillo, Federico Brunelli, Mhagna Zean, Giovanni Troise
Aortic root replacement with a biological conduit results in excellent hemodynamics but has limited durability. We report a series of six patients who underwent successful Perceval-S surgical aortic valve implantation following surgical deterioration of a biological valve composite conduit and discuss the technical details and the importance of appropriate valve sizing for this procedure.
August 17, 2017: Journal of Cardiac Surgery
https://www.readbyqxmd.com/read/28829747/mid-term-performance-of-a-novel-restorative-pulmonary-valved-conduit-preclinical-results
#11
Osama I I Soliman, Yosuke Miyazaki, Mohammad Abdelghani, Marieke Brugmans, Maarten Witsenburg, Yoshinobu Onuma, Martijn Cox, Patrick W Serruys
AIMS: A bioabsorbable pulmonary valved-conduit (XPV), designed to guide functional restoration patients own tissue, is potentially more durable than current pulmonary bioprosthetic valves/valved-conduits. The aim of this study was to assess the hemodynamic performance of the novel XPV implanted in an ovine model. METHODS AND RESULTS: The XPV was surgically implanted in adult sheep under general anaesthesia and cardiopulmonary bypass (XPV-group, n=20). Sheep that received a Hancock bioprosthetic pulmonary valved-conduit served as a control group (HPV-group, n=3)...
August 22, 2017: EuroIntervention
https://www.readbyqxmd.com/read/28820540/endoscopic-port-access-surgery-for-late-orthotopic-cardiac-transplantation-atrioventricular-valve-disease
#12
Johan van der Merwe, Filip Casselman, Bernard Stockman, Yvette Vermeulen, Ivan Degrieck, Frank Van Praet
BACKGROUND: The study aim was to present details of the perioperative and long-term outcomes of redo-endoscopic port access surgery (REPAS) for late atrioventricular valve disease (AVVD) in orthotopic cardiac transplant (OCT) patients. METHODS: Between February 2004 and October 2015, REPAS was performed for late AVVD in seven consecutive OCT patients (mean age 57.9 ± 17.2 years; EuroSCORE II 21.2 ± 14.7%) at the authors' institution. The mean OCT-REPAS time interval was 7...
March 2017: Journal of Heart Valve Disease
https://www.readbyqxmd.com/read/28820034/the-value-of-adding-sub-valvular-procedures-for-chronic-ischemic-mitral-regurgitation-surgery-a-meta-analysis
#13
Marco Moscarelli, Thanos Athanasiou, Giuseppe Speziale, Prakash P Punjabi, George Malietzis, Patrizio Lancellotti, Khalil Fattouch
BACKGROUND: The most performed repair technique for the treatment of chronic ischemic mitral regurgitation in patients referred for bypass grafting remains restricted annuloplasty. However, it is associated with a high rate of failure, especially if severe tenting exists. OBJECTIVES: To understand if adjunctive sub-valvular mitral procedures may provide better repair performance. METHODS: A systematic literature review identified six studies of which five fulfilled the criteria for meta-analysis...
September 2017: Perfusion
https://www.readbyqxmd.com/read/28818190/aortic-bioprosthetic-valve-durability-incidence-mechanisms-predictors-and-management-of-surgical%C3%A2-and-transcatheter-valve-degeneration
#14
REVIEW
Tania Rodriguez-Gabella, Pierre Voisine, Rishi Puri, Philippe Pibarot, Josep Rodés-Cabau
In recent times, there has been a considerable increase in the use of aortic bioprostheses (vs. mechanical prostheses) for treating aortic valve disease, and this tendency is likely to continue in the near future. However, the occurrence of structural valve degeneration, limiting valve durability, remains an important drawback of surgical and transcatheter bioprostheses. In this paper, we provide an overview of bioprosthetic valve durability, focusing on the definition, incidence, mechanisms, predictive factors, and management of structural degeneration of aortic bioprostheses...
August 22, 2017: Journal of the American College of Cardiology
https://www.readbyqxmd.com/read/28805140/a-rat-model-for-the-in-vivo-assessment-of-biological-and-tissue-engineered-valvular-and-vascular-grafts
#15
Yukiharu Sugimura, Anna Kathrin Schmidt, Artur Lichtenberg, Alexander Assmann, Payam Akhyari
The demand for an improvement of the biocompatibility and durability of vascular and valvular implants requires translational animal models to study the in vivo fate of cardiovascular grafts. In the present article, a review on the development and application of a microsurgical rat model of infrarenal implantation of aortic grafts and aortic valved conduits is provided. By refinement of surgical techniques and inclusion of hemodynamic considerations, a functional model has been created, which provides a modular platform for the in vivo assessment of biological and tissue-engineered grafts...
September 20, 2017: Tissue Engineering. Part C, Methods
https://www.readbyqxmd.com/read/28803350/comparison-of-mitral-competence-after-mitral-repair-with-papillary-muscle-approximation-versus-papillary-muscle-relocation-for-functional-mitral-regurgitation
#16
Koji Furukawa, Mitsuhiro Yano, Eisaku Nakamura, Masakazu Matsuyama, Masanori Nishimura, Katsuya Kawagoe, Kunihide Nakamura
The purpose of this study was to evaluate the surgical results of papillary muscle approximation (PMA) and papillary muscle relocation (PMR) for functional mitral regurgitation (FMR) and to compare the effects of both procedures on the change in mitral regurgitation (MR) and echocardiogram parameters associated with tethering. Eighteen patients with moderate-to-severe FMR (MR grade ≥2) who underwent PMA or PMR were retrospectively analyzed. Underlying diseases were ischemic cardiomyopathy, idiopathic dilated cardiomyopathy, and aortic valve disease for seven, six, and five patients, respectively...
August 12, 2017: Heart and Vessels
https://www.readbyqxmd.com/read/28795027/the-ross-procedure-in-pediatric-patients-a-20-year-experience-of-ross-procedure-in-a-single-institution
#17
Dong Woog Yoon, Ji-Hyuk Yang, Tae-Gook Jun, Pyo Won Park
BACKGROUND: The Ross/Ross-Konno procedure is considered a good option for irreparable aortic valve disease in pediatric patients because of its hemodynamic performance and potential for growth of the pulmonary autograft. This study is a review of the long-term results of our 20-year experience with the Ross and Ross-Konno operations in a single institution. METHODS: Between June 1995 and January 2016, 16 consecutive patients (mean age, 6.0±5.9 years; range, 16 days to 17...
August 2017: Korean Journal of Thoracic and Cardiovascular Surgery
https://www.readbyqxmd.com/read/28782294/selective-patient-experience-with-the-blom-singer-dual-valve-voice-prosthesis
#18
Ben Brownlee, Saniya Ahmad, Tracy Grammer, Greg Krempl
OBJECTIVES/HYPOTHESIS: This study compares the overall durability, phonation effort, and speech quality achieved by the Blom-Singer Dual Valve prosthesis to the same characteristics achieved by the single-valve prosthesis used in a select population of total laryngectomy patients who have demonstrated single-valve prosthesis failure within 3 months of placement. STUDY DESIGN: Prospective phase IV study. METHODS: Fourteen patients who had previously experienced early valve failure using a single-valve prosthesis had a Dual Valve placed by a speech language pathologist...
August 7, 2017: Laryngoscope
https://www.readbyqxmd.com/read/28780254/modeling-the-response-of-exogenously-crosslinked-tissue-to-cyclic-loading-the-effects-of-permanent-set
#19
Will Zhang, Michael S Sacks
Bioprosthetic heart valves (BHVs), fabricated from exogenously crosslinked collagenous tissues, remain the most popular heart valve replacement design. However, the life span of BHVs remains limited to 10-15 years, in part because the mechanisms that underlie BHV failure remain poorly understood. Experimental evidence indicates that BHVs undergo significant changes in geometry with in vivo operation, which lead to stress concentrations that can have significant impact on structural damage. These changes do not appear to be due to plastic deformation, as the leaflets only deform in the elastic regime...
July 11, 2017: Journal of the Mechanical Behavior of Biomedical Materials
https://www.readbyqxmd.com/read/28776326/a-comprehensive-pipeline-for-multi-resolution-modeling-of-the-mitral-valve-validation-computational-efficiency-and-predictive-capability
#20
Andrew Drach, Amir H Khalighi, Michael S Sacks
Multiple studies have demonstrated that the pathological geometries unique to each patient can affect the durability of mitral valve (MV) repairs. While computational modeling of the MV is a promising approach to improve the surgical outcomes, the complex MV geometry precludes use of simplified models. Moreover, the lack of complete in-vivo geometric information presents significant challenges in the development of patient-specific computational models. There is thus a need to determine the level of detail necessary for predictive MV models...
August 3, 2017: International Journal for Numerical Methods in Biomedical Engineering
keyword
keyword
9844
1
2
Fetch more papers »
Fetching more papers... Fetching...
Read by QxMD. Sign in or create an account to discover new knowledge that matter to you.
Remove bar
Read by QxMD icon Read
×

Search Tips

Use Boolean operators: AND/OR

diabetic AND foot
diabetes OR diabetic

Exclude a word using the 'minus' sign

Virchow -triad

Use Parentheses

water AND (cup OR glass)

Add an asterisk (*) at end of a word to include word stems

Neuro* will search for Neurology, Neuroscientist, Neurological, and so on

Use quotes to search for an exact phrase

"primary prevention of cancer"
(heart or cardiac or cardio*) AND arrest -"American Heart Association"