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Valve durability

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https://www.readbyqxmd.com/read/29153244/outcomes-of-transcatheter-tricuspid-valve-in-valve-implantation-in-patients-with-ebstein-anomaly
#1
Nathaniel W Taggart, Allison K Cabalka, Andreas Eicken, Jamil A Aboulhosn, John D R Thomson, Brian Whisenant, Martin L Bocks, Stephan Schubert, Thomas K Jones, Jeremy D Asnes, Thomas E Fagan, Jeffery Meadows, Mark Hoyer, Mary H Martin, Frank F Ing, Daniel R Turner, Azeem Latib, Aphrodite Tzifa, Stephan Windecker, Bryan H Goldstein, Jeffrey W Delaney, James A Kuo, Susan Foerster, Matthew Gillespie, Gianfranco Butera, Shabana Shahanavaz, Eric Horlick, Younes Boudjemline, Daniel Dvir, Doff B McElhinney
We sought to describe the acute results and short- to medium-term durability of transcatheter tricuspid valve-in-valve (TVIV) implantation within surgical bioprostheses among patients with Ebstein anomaly (EA). Cases were identified from a voluntary, multicenter, international registry of 29 institutions that perform TVIV. Demographic, clinical, procedural, and follow-up data were analyzed. Eighty-one patients with EA underwent TVIV from 2008 to 2016. Thirty-four patients (42%) were New York Heart Association (NYHA) class 3/4 at time of TVIV...
October 19, 2017: American Journal of Cardiology
https://www.readbyqxmd.com/read/29108586/exploiting-an-automated-microfluidic-hydrodynamic-sequential-injection-system-for-determination-of-phosphate
#2
Wanpen Khongpet, Somkid Pencharee, Chanida Puangpila, Supaporn Kradtap Hartwell, Somchai Lapanantnoppakhun, Jaroon Jakmunee
A microfluidic hydrodynamic sequential injection (μHSI) spectrophotometric system was designed and fabricated. The system was built by laser engraving a manifold pattern on an acrylic block and sealing with another flat acrylic plate to form a microfluidic channel platform. The platform was incorporated with small solenoid valves to obtain a portable setup for programmable control of the liquid flow into the channel according to the HSI principle. The system was demonstrated for the determination of phosphate using a molybdenum blue method...
January 15, 2018: Talanta
https://www.readbyqxmd.com/read/29103675/heart-valve-surgery-performed-by-trainee-surgeons-meta-analysis-of-clinical-outcomes
#3
REVIEW
Akshat Saxena, Sohaib A Virk, Sebastian R A Bowman, Richmond Jeremy, Paul G Bannon
BACKGROUND: Cardiac surgical units must balance trainee education with the duty to provide optimal patient care. This is particularly challenging with valvular surgery, given the lower volume and increased complexity of these procedures. The present meta-analysis was conducted to assess the impact of trainee operator status on clinical outcomes following valvular surgery. METHODS: Medline, Embase and CENTRAL databases were systematically searched for studies reporting clinical outcomes according to the training status of the primary operator (consultant or trainee)...
October 27, 2017: Heart, Lung & Circulation
https://www.readbyqxmd.com/read/29101018/tissue-processing-techniques-for-fabrication-of-covered-stents-for-small-diameter-vascular-intervention
#4
Shahar Cohen, Smadar Magal, Itay Yakov, Evyatar Sirabella, Anna Bitman, Gabriel Groisman, Chaim Lotan
Animal-derived pericardial tissue is a widely used biomaterial typically treated with glutaraldehyde (GA) to achieve immunological acceptance and long-term durability. However, GA fixation of biological tissue is associated with long-term failure due to degeneration and calcification. In this study, we evaluated two alternative tissue processing methods for the fabrication of pericardial tissue covered stents: detergent-based decellularization (decell) and limited exposure to GA (gentle-glut). Processed pericardial tissues were extensively characterized both in-vitro and in-vivo...
October 31, 2017: Acta Biomaterialia
https://www.readbyqxmd.com/read/29100642/medium-term-outcomes-after-implantation-of-expanded-polytetrafluoroethylene-valved-conduit
#5
Yoshio Ootaki, Allison S Welch, Michael J Walsh, Michael D Quartermain, Derek A Williams, Ross M Ungerleider
BACKGROUND: Pulmonary valve replacement is becoming the most frequent congenital heart surgery performed on adolescents and young adults. Numerous surgical options are available, including autologous pericardium, mechanical valves, allografts, and bioprosthetic valves. Each option has limitations with durability and freedom from reintervention for stenosis or insufficiency, particularly in the pediatric population. The purpose of this study was to analyze our uniquely designed, expanded polytetrafluoroethylene (ePTFE) valved conduit (VC) for right ventricular outflow tract reconstruction...
November 1, 2017: Annals of Thoracic Surgery
https://www.readbyqxmd.com/read/29092120/immunologic-responses-in-biological-and-mechanical-valve-prostheses-inflammation-and-functionality-are-not-always-related
#6
Alejandra Rodriguez-Hernandez, Maria Elena Soto, Jesus Vargas-Barron, Ricardo Marquez, Rafael Bojalil-Parra, Israel Perez-Torres, Jose Luis Salas-Pacheco, Valentin Jimenez-Rojas, Jose Antonio Arias-Godinez, Veronica Guarner-Lans
BACKGROUND: The aim of this retrospective study was to evaluate the inflammatory response in patients with aortic and/or mitral prostheses, and to correlate the level of inflammatory markers with prosthesis functionality. METHODS: A total of 48 patients with biological or mechanical prostheses was included in the study, in which levels of tumor necrosis factor-alpha (TNFα), interleukin (IL)-1, -4, and -6, interferon-gamma (IFNγ), osteopontin (OPN), intercellular adhesion molecule (ICAM), vascular cell adhesion molecule (VCAM), endothelin-1 and C-reactive protein were analyzed...
May 2017: Journal of Heart Valve Disease
https://www.readbyqxmd.com/read/29092100/improved-dynamic-predictions-from-joint-models-of-longitudinal-and-survival-data-with-time-varying-effects-using-p-splines
#7
Eleni-Rosalina Andrinopoulou, Paul H C Eilers, Johanna J M Takkenberg, Dimitris Rizopoulos
In the field of cardio-thoracic surgery, valve function is monitored over time after surgery. The motivation for our research comes from a study which includes patients who received a human tissue valve in the aortic position. These patients are followed prospectively over time by standardized echocardiographic assessment of valve function. Loss of follow-up could be caused by valve intervention or the death of the patient. One of the main characteristics of the human valve is that its durability is limited...
November 1, 2017: Biometrics
https://www.readbyqxmd.com/read/29062751/those-who-do-not-remember-the-past-are-condemned-to-repeat-it
#8
Prem S Shekar, Daniel Rinewalt
Transcatheter aortic valve replacement (TAVR) for aortic valve stenosis has rapidly progressed from its initial application in the inoperable or high-risk patients to those determined to be intermediate and low risk. It is our concern this has occurred without adequate knowledge or examination of the long-term durability of TAVR valves and the impact on subsequent aortic valve surgery, should it be required. In this editorial, we provide insight and reflect upon lessons learned from past surgical techniques and their subsequent abandonment...
September 2017: Annals of Cardiothoracic Surgery
https://www.readbyqxmd.com/read/29062745/review-of-minimal-access-versus-transcatheter-aortic-valve-replacement-for-patients-with-severe-aortic-stenosis
#9
Carson T Hoffmann, Jacob A Heiner, Tom C Nguyen
Transcatheter aortic valve replacement (TAVR) and minimally invasive aortic valve replacement (miniAVR) have become alternatives to surgical aortic valve replacement via median sternotomy (SAVR) to treat severe aortic stenosis (AS). Despite increased interest and utilization, few studies have directly compared TAVR and miniAVR. A review of the current literature shows TAVR to be an indispensable tool for inoperable, high-risk, and perhaps intermediate-risk patients with severe AS. However, it is associated with a number of deleterious perioperative outcomes, such as valvular regurgitation and vascular complications...
September 2017: Annals of Cardiothoracic Surgery
https://www.readbyqxmd.com/read/29062744/transcatheter-aortic-valve-replacement-in-intermediate-and-low-risk-patients-clinical-evidence
#10
Sameer Arora, John P Vavalle
The encouraging results of the PARTNER 2 (Placement of AoRtic TraNscathetER Valves 2) trial led to the approval of transcatheter aortic valve replacement (TAVR) in intermediate-surgical-risk patients. Recently, the SURTAVI (SUrgical Replacement and Transcatheter Aortic Valve Implantation) investigators demonstrated the feasibility of TAVR with self-expanding valves in intermediate-risk patients. The focus has now shifted to clinical trials comparing TAVR to surgery in low-surgical-risk populations with a goal to expand TAVR to all-risk patients...
September 2017: Annals of Cardiothoracic Surgery
https://www.readbyqxmd.com/read/29062739/pros-and-cons-of-transcatheter-aortic-valve-implantation-tavi
#11
REVIEW
Juan A Terré, Isaac George, Craig R Smith
Transcatheter aortic valve implantation (TAVI) or replacement (TAVR) was recently approved by the FDA for intermediate risk patients with severe aortic stenosis (AS). This technique was already worldwide adopted for inoperable and high-risk patients. Improved device technology, imaging analysis and operator expertise has reduced the initial worrisome higher complications rate associated with TAVR, making it comparable to surgical aortic valve replacement (SAVR). However, many answers need to be addressed before adoption in lower risk patients...
September 2017: Annals of Cardiothoracic Surgery
https://www.readbyqxmd.com/read/29050727/surgical-treatment-of-active-native-mitral-infective-endocarditis-a%C3%A2-meta-analysis-of-current-evidence
#12
Jian-Zhou Liu, Xiao-Feng Li, Qi Miao, Chao-Ji Zhang
BACKGROUND: The native mitral lesion of active infective endocarditis implies a poor prognosis and is associated with adverse short- or long-term results without surgical treatment. Both mitral valvuloplasty (MVP) and mitral valve replacement (MVR) have been performed in the treatment of active native mitral infective endocarditis (ANMIE). However, the outcomes of the two approaches remain unclear. The aim of this study was to systematically review the two procedures with mortality and survival as the primary endpoints...
October 16, 2017: Journal of the Chinese Medical Association: JCMA
https://www.readbyqxmd.com/read/29049793/triangular-resection-versus-neochordal-replacement-for-posterior-leaflet-prolapse-a-morphological-assessment
#13
Wenrui Ma, Jiafei Chen, Wei Zhang, Weihua Wu, Wei Ye, Wei Shi, Ye Kong
OBJECTIVES: To evaluate the morphological reconstruction as assessed by 3D transoesophageal echocardiography after triangular resection and neochordal replacement in the treatment of posterior leaflet prolapse. METHODS: We retrospectively selected 46 patients with isolated posterior leaflet prolapse who were undergoing mitral valve repair using triangular resection ( n  = 20) and neochordal replacement ( n  = 26) techniques. Sixty patients without valvular heart disease were also included as the control group...
August 14, 2017: Interactive Cardiovascular and Thoracic Surgery
https://www.readbyqxmd.com/read/29049705/follow-up-of-a-simple-method-for-aortic-valve-reconstruction-with-fixed-pericardium-in-children
#14
Amir-Reza Hosseinpour, Alejandro Adsuar-Gómez, Antonio González-Calle, Antonio Moruno-Tirado, Francisco García-Angleu, Israel Valverde, Felix Coserria-Sánchez, Begoña Manso-García
In 2013, we published a simple method for aortic valve reconstruction in children using fixed pericardium in this journal. This was not expected to be a durable solution but a temporizing measure in the absence of other solutions, in order to buy time for growth that would allow subsequent prosthetic valve insertion. As such, this was implemented in 3 patients with excellent immediate results, as reported in our original publication. We are now writing to provide longer term information. In 2 cases, a newborn and a 12-year-old boy, the valve calcified heavily at 4 years' follow-up...
July 21, 2017: Interactive Cardiovascular and Thoracic Surgery
https://www.readbyqxmd.com/read/29049538/3d-printed-mitral-valve-models-affordable-simulation-for-robotic-mitral-valve-repair
#15
Ned Premyodhin, Divneet Mandair, Alice S Ferng, Timothy S Leach, Ryan P Palsma, Mohammad Z Albanna, Zain I Khalpey
OBJECTIVES: 3D printed mitral valve (MV) models that capture the suture response of real tissue may be utilized as surgical training tools. Leveraging clinical imaging modalities, 3D computerized modelling and 3D printing technology to produce affordable models complements currently available virtual simulators and paves the way for patient- and pathology-specific preoperative rehearsal. METHODS: We used polyvinyl alcohol, a dissolvable thermoplastic, to 3D print moulds that were casted with liquid platinum-cure silicone yielding flexible, low-cost MV models capable of simulating valvular tissue...
July 31, 2017: Interactive Cardiovascular and Thoracic Surgery
https://www.readbyqxmd.com/read/29049534/high-frequency-percussive-ventilation-in-cardiac-surgery-patients-failing-mechanical-conventional-ventilation
#16
Ivan Wong, Berhane Worku, Jeremy A Weingarten, Alexander Ivanov, Felix Khusid, Ashwad Afzal, Robert F Tranbaugh, Iosif Gulkarov
OBJECTIVES: Failure of mechanical conventional ventilation (MCV) after cardiac surgery portends a dismal prognosis, with extracorporeal membrane oxygenation frequently utilized as a salvage therapy. We describe our experience with high-frequency percussive ventilation (HFPV) as a rescue therapy for hypoxaemia refractory to MCV after cardiac surgery. METHODS: In a 6-year retrospective analysis from 2009 to 2015, we identified 16 subjects who required HFPV after cardiac surgery...
July 21, 2017: Interactive Cardiovascular and Thoracic Surgery
https://www.readbyqxmd.com/read/29031049/heart-valve-scaffold-fabrication-bioinspired-control-of-macro-scale-morphology-mechanics-and-micro-structure
#17
Antonio D'Amore, Samuel K Luketich, Giuseppe M Raffa, Salim Olia, Giorgio Menallo, Antonino Mazzola, Flavio D'Accardi, Tamir Grunberg, Xinzhu Gu, Michele Pilato, Marina V Kameneva, Vinay Badhwar, William R Wagner
Valvular heart disease is currently treated with mechanical valves, which benefit from longevity, but are burdened by chronic anticoagulation therapy, or with bioprosthetic valves, which have reduced thromboembolic risk, but limited durability. Tissue engineered heart valves have been proposed to resolve these issues by implanting a scaffold that is replaced by endogenous growth, leaving autologous, functional leaflets that would putatively eliminate the need for anticoagulation and avoid calcification. Despite the diversity in fabrication strategies and encouraging results in large animal models, control over engineered valve structure-function remains at best partial...
October 6, 2017: Biomaterials
https://www.readbyqxmd.com/read/29029140/structural-valve-deterioration-in-the-mitroflow-biological-heart-valve-prosthesis
#18
Issa Farah Issa, Steen Hvitfeldt Poulsen, Farhad Waziri, Christian Torp Pedersen, Per Hostrup Nielsen, Lars Riber, Jordi S Dahl, Peter Søgaard, Martin Agge Nørgaard, Jacob Eifer Møller
OBJECTIVES: Concern has been raised regarding the long-term durability of the Mitroflow biological heart valve prosthesis. Our aim was to assess the incidence of structural valve degeneration (SVD) for the Mitroflow bioprosthesis in a nationwide study in Denmark including all patients alive in Denmark who had received a Mitroflow aortic bioprosthesis since 2000. METHODS: Patients alive in Denmark with a Mitroflow bioprosthesis implanted since January 2000 were invited to participate in a nationwide cross-sectional study with a predefined definition of SVD...
September 28, 2017: European Journal of Cardio-thoracic Surgery
https://www.readbyqxmd.com/read/29029050/small-sized-conduits-in-the-right-ventricular-outflow-tract-in-young-children-bicuspidalized-homografts-are-a-good-alternative-to-standard-conduits
#19
Katrien François, Katya De Groote, Kristof Vandekerckhove, Hans De Wilde, Daniel De Wolf, Thierry Bové
OBJECTIVES: Downsizing a homograft (HG) through bicuspidalization has been used for more than 2 decades to overcome the shortage of small-sized conduits for reconstruction of the right ventricular outflow tract (RVOT) in young children. Our goal was to investigate the durability of bicuspidalized HGs compared with other small HGs. METHODS: A retrospective analysis of 93 conduits ≤20 mm, implanted over 23 years, was performed. The end-points were survival, structural valve degeneration and conduit replacement...
October 3, 2017: European Journal of Cardio-thoracic Surgery
https://www.readbyqxmd.com/read/29020344/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
#20
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.
July 21, 2017: European Heart Journal
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