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mechanical valve prostheses

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https://www.readbyqxmd.com/read/29780360/the-association-between-long-term-acenocoumarol-treatment-and-vitamin-d-deficiency
#1
Jolanta Sawicka-Powierza, Jerzy Konstantynowicz, Ewa Jablonska, Beata Zelazowska-Rutkowska, Wojciech Jelski, Pawel Abramowicz, Caroline Sasinowski, Slawomir Chlabicz
Objective: Both vitamin D and K2 are involved in a number of metabolic processes, including bone metabolism; however, associations between the vitamins are not fully understood. The aim of the study was to evaluate serum concentrations of 25-hydroxyvitamin D [25(OH)D] in adult patients receiving long-term acenocoumarol (AC) treatment. Participants and methods: In this cross-sectional study, 58 Caucasian patients (31 women, 27 men) with a median age of 65 years receiving long-term AC therapy were evaluated and compared with 35 age- and gender-matched healthy controls...
2018: Frontiers in Endocrinology
https://www.readbyqxmd.com/read/29768730/biofilm-in-voice-prosthesis-a-prospective-cohort-study-and-laboratory-tests-using-sonication-and-sem-analysis
#2
Jacopo Galli, Lea Calo', Duino Meucci, Monica Giuliani, Daniela Lucidi, Gaetano Paludetti, Riccardo Torelli, Maurizio Sanguinetti, Claudio Parrilla
OBJECTIVE: The objective of the study was to compare the biofilm growing pattern and its morphological extent on silicone and a teflon-like material using a sonication process and a Scanning Electron Microscope (SEM). DESIGN: A prospective cohort study and a laboratory study. SETTING: Otolaryngology -Head and Neck surgery Department and the Microbiology Institute. PARTICIPANTS: The participants included fifteen laryngectomized patients with phonatory prostheses, which were removed due to device failure, and two different kinds of phonatory prostheses from the laboratory (Provox 2 and ActiValve) that were artificially colonized by Candida albicans...
May 16, 2018: Clinical Otolaryngology
https://www.readbyqxmd.com/read/29750928/surgical-management-of-tricuspid-valve-infective-endocarditis-a-systematic-review-and-meta-analysis
#3
Bobby Yanagawa, Malak Elbatarny, Subodh Verma, Samantha Hill, Amine Mazine, John D Puskas, Jan O Friedrich
BACKGROUND: This meta-analysis compares the early and late outcomes of valve repair versus replacement, the primary surgical strategies for tricuspid valve infective endocarditis (IE). METHODS: We searched MEDLINE and EMBASE databases until 2016 for studies comparing tricuspid valve repair and replacement. RESULTS: The main outcomes were mortality, recurrent IE and need for reoperation. There were 12 unmatched retrospective observational studies with 1165 patients (median follow up 3...
May 8, 2018: Annals of Thoracic Surgery
https://www.readbyqxmd.com/read/29688192/-modern-polyurethanes-in-cardiovascular-surgery
#4
A A Gostev, P P Laktionov, A A Karpenko
Currently, there is great clinical demand for synthetic tissue-engineered cardiovascular prostheses with good long-term patency. Polyurethanes belong to the class of polymers with excellent bio- and hemocompatibility. They are known to possess good mechanical properties, but are prone to processes of degradation in conditions of functioning in living organisms. Attempts at solving this problem have resulted in the development of various new subclasses of polyurethanes such as thermoplastic polyether polyurethanes, polyurethanes with a silicone segment, polycarbonate polyurethanes and nanocomposite polyurethanes...
2018: Angiologii︠a︡ i Sosudistai︠a︡ Khirurgii︠a︡, Angiology and Vascular Surgery
https://www.readbyqxmd.com/read/29684546/connubial-bliss-or-distress-transcatheter-mitral-valve-implantation-with-mechanical-aortic-prostheses
#5
EDITORIAL
Mohamad Alkhouli, Vinay Badhwar
No abstract text is available yet for this article.
April 20, 2018: Seminars in Thoracic and Cardiovascular Surgery
https://www.readbyqxmd.com/read/29669161/latest-advances-in-cardiac-valvular-replacement
#6
Ruggero De Paulis, Salvatore D'Aleo, Ilaria Chirichilli, Luca Paolo Weltert
The original monograph on valvular prostheses in Surgical Technology International was published in 1993. It represents a milestone and a reference point for critically organizing information on a complex and rapidly evolving topic. The last update was published in 2010. Since then, there have been significant developments regarding both "traditional" surgical prosthesis and valves for transcatheter implantation. Both bioprostheses and mechanical prostheses continue to evolve with respect to both their design and materials to further optimize hemodynamics and prevent a patient-prosthesis mismatch...
April 18, 2018: Surgical Technology International
https://www.readbyqxmd.com/read/29662807/mechanical-versus-tissue-aortic-prosthesis-in-sexagenarians-comparison-of-hemodynamic-and-clinical-outcomes
#7
Jongbae Son, Yang Hyun Cho, Dong Seop Jeong, Kiick Sung, Wook Sung Kim, Young Tak Lee, Pyo Won Park
Background: The question of which type of prosthetic aortic valve leads to the best outcomes in patients in their 60s remains controversial. We examined the hemodynamic and clinical outcomes of aortic valve replacement in sexagenarians according to the type of prosthesis. Methods: We retrospectively reviewed 270 patients in their 60s who underwent first-time aortic valve replacement from 1995 to 2011. Early and late mortality, major adverse valve-related events, anticoagulation-related events, and hemodynamic outcomes were assessed...
April 2018: Korean Journal of Thoracic and Cardiovascular Surgery
https://www.readbyqxmd.com/read/29618696/subclinical-leaflet-thrombosis-in-transcatheter-aortic-valve-replacement-detected-by-multidetector-computed-tomography-a-review-of-current-evidence
#8
Hashrul N Rashid, Adam J Brown, Liam M McCormick, Ameera S Amiruddin, Kim K Be, James D Cameron, Arthur Nasis, Robert P Gooley
Subclinical leaflet thrombosis (SLT) following transcatheter aortic valve replacement (TAVR) has been increasingly recognized. SLT has the hallmark features of hypo-attenuated leaflet thickening (HALT) on multidetector computed tomography (MDCT), which may result in hypoattenuation affecting motion (HAM). The actual prevalence of this condition is uncertain, with limited observational registries. SLT has caught the attention of the cardiovascular community because of concerns regarding its clinical sequelae, specifically the potential increased incidence of cerebrovascular events...
April 4, 2018: Circulation Journal: Official Journal of the Japanese Circulation Society
https://www.readbyqxmd.com/read/29617499/mortality-predictors-in-the-surgical-treatment-of-active-infective-endocarditis
#9
Jenny Lourdes Rivas de Oliveira, Magaly Arrais Dos Santos, Renato Tambellini Arnoni, Auristela Ramos, Dorival Della Togna, Samira Kaissar Ghorayeb, Roberto Tadeu Magro Kroll, Luiz Carlos Bento de Souza
INTRODUCTION: Active infective endocarditis is associated with high morbidity and mortality. Surgery is indicated in high-risk conditions, and the main determinants of mortality in surgical treatment should be evaluated. OBJECTIVE: To identify mortality predictors in the surgical treatment of active infective endocarditis in a long-term follow-up. METHODS: This prospective observational study involved 88 consecutive patients diagnosed with active infective endocarditis, who underwent surgery between January 2005 and December 2015...
January 2018: Brazilian Journal of Cardiovascular Surgery
https://www.readbyqxmd.com/read/29609891/bentall-procedure-after-previous-aortic-valve-or-complete-root-replacement-usefulness-of-self-assembled-aortic-valve-conduit
#10
Paul P Urbanski, Fitsum Lakew, Witold Dinstak, Nicolas Heinz, Michael Zacher, Vadim Irimie, Wilko Reents
OBJECTIVES: The aim of this study was to evaluate surgical results of complete aortic root replacement using self-assembled valve composite graft in the setting of destroyed aortic annulus after previous valve replacement. METHODS: Aortic root pathology being addressed by complete root replacement was combined with partial or complete absence of annular tissue in 112 consecutive patients. Eighty-eight had undergone a previous replacement of the aortic valve and 24 had undergone root replacement with a valved conduit...
March 11, 2018: Journal of Thoracic and Cardiovascular Surgery
https://www.readbyqxmd.com/read/29604404/cardiovascular-tissue-engineering-from-basic-science-to-clinical-application
#11
REVIEW
E S Fioretta, L von Boehmer, S E Motta, V Lintas, S P Hoerstrup, M Y Emmert
Valvular heart disease is an increasing population health problem and, especially in the elderly, a significant cause of morbidity and mortality. The current treatment options, such as mechanical and bioprosthetic heart valve replacements, have significant restrictions and limitations. Considering the increased life expectancy of our aging population, there is an urgent need for novel heart valve concepts that remain functional throughout life to prevent the need for reoperation. Heart valve tissue engineering aims to overcome these constraints by creating regenerative, self-repairing valve substitutes with life-long durability...
March 28, 2018: Experimental Gerontology
https://www.readbyqxmd.com/read/29589379/results-and-factors-associated-with-adverse-outcome-after-tricuspid-valve-replacement
#12
Paweł Litwiński, Piotr Kołsut, Tadeusz Sitko, Tomasz Zieliński, Piotr Hoffman, Tomasz Hryniewiecki, Jacek Różański, Mariusz Kuśmierczyk
BACKGROUND: This retrospective analysis of patients with severe tricuspid valve disease, who underwent tricuspid valve replacement (TVR) for either tricuspid regurgitation or stenosis, represents an attempt to determine the factors that predict poor hospital and long-term survival. METHODS: The study population consisted of 86 patients, 65 female and 21 male, who underwent TVR with or without concomitant surgical procedures between 2000 and 2010 at our institution...
March 28, 2018: Kardiologia Polska
https://www.readbyqxmd.com/read/29430890/tricuspid-valve-replacement-results-of-an-orphan-procedure-which-is-the-best-prosthesis
#13
Dominik Wiedemann, Veronika Rupprechter, Julia Mascherbauer, Andreas Kammerlander, Bruno Mora, Kamen Dimitrov, Benedikt Weber, Martin Andreas, Günther Laufer, Alfred Kocher
BACKGROUND: Replacement of the tricuspid valve is uncommon. Prostheses specifically designed for the this position are not available. Bovine, porcine as well as mechanical valve prostheses are currently used, however, the most suitable prosthesis type has not been defined. METHODS: We retrospectively analyzed all consecutive patients who underwent tricuspid valve replacement (TVR) at the Medical University of Vienna from 1996 to 2014. Baseline patient characteristics, prosthesis type, and postoperative outcome data were collected...
February 8, 2018: Journal of Cardiovascular Surgery
https://www.readbyqxmd.com/read/29408248/bilateral-opposing-loop-technique-b-o-l-t-for-securing-air-knots
#14
Laura M Seese, Faisal G Bakaeen, Ibrahim Sultan, Danny Chu
Incompletely seated knots (air knots) during surgical aortic valve replacement can be potentially difficult to repair in anatomically challenging areas around the aortic root. This is especially true with mechanical protheses as subvalvular areas are inaccessble once the valve is seated. In this report, we present a novel and simple technique of tightening air knots from within the aortic root without removing the prosthesis. The definitive surgical therapy for aortic valve disease has been in evolution since the advent of cardiopulmonary bypass and the development of aortic valve prostheses...
February 2, 2018: Annals of Thoracic Surgery
https://www.readbyqxmd.com/read/29404788/surgical-treatment-of-valvular-heart-disease-overview-of-mechanical-and-tissue-prostheses-advantages-disadvantages-and-implications-for-clinical-use
#15
REVIEW
Amy G Fiedler, George Tolis
Valvular heart disease (VHD) affects a large number of patients annually. From a surgical standpoint, there are two primary options for valve replacement: mechanical or bioprosthetic. While there are clear advantages and disadvantages to either option, and recent literature does challenge some of the prior dictums of valve choice, a handful of absolutes remain true. Mechanical valves provide superior durability and freedom from re-operation when compared to their bioprosthetic counterparts, at the expense of bleeding or thrombotic complications associated with the need for lifelong oral anticoagulation...
February 5, 2018: Current Treatment Options in Cardiovascular Medicine
https://www.readbyqxmd.com/read/29375879/a-tilt-toward-cinefluoroscopy
#16
Konstantinos Lampropoulos, Athanasios Bakalakos, George Bazoukis, Athanasios Saplaouras, Antigoni Sakellaropoulou, Aikaterini Anagnostou, Gary Tse, Michalis Tsamatsoulis, Christos Charitos
Fluoroscopy permits rapid and straightforward assessment of mechanical valve function and allows a distinction between normal and malfunctional prostheses, acting as a complementary diagnostic step.
January 2018: Clinical Case Reports
https://www.readbyqxmd.com/read/29321130/exercise-hemodynamic-and-functional-capacity-after-mitral-valve-replacement-in-patients-with-ischemic-mitral-regurgitation-a-comparison-of-mechanical-versus-biological-prostheses
#17
Carlo Fino, Attilio Iacovoni, Philippe Pibarot, John R Pepper, Paolo Ferrero, Maurizio Merlo, Lorenzo Galletti, Massimo Caputo, Paolo Ferrazzi, Constantinos Anagnostopoulos, Diego Cugola, Michele Senni, Diego Bellavia, Julien Magne
BACKGROUND: In patients with ischemic mitral regurgitation requiring mitral valve replacement (MVR), the choice of the prosthesis type is crucial. The exercise hemodynamic and functional capacity performance in patients with contemporary prostheses have never been investigated. To compare exercise hemodynamic and functional capacity between biological (MVRb) and mechanical (MVRm) prostheses. METHODS AND RESULTS: We analyzed 86 consecutive patients with ischemic mitral regurgitation who underwent MVRb (n=41) or MVRm (n=45) and coronary artery bypass grafting...
January 2018: Circulation. Heart Failure
https://www.readbyqxmd.com/read/29221261/clinical-analysis-of-acute-myocardial-infarction-caused-by-coronary-embolism
#18
Zhen-Yu Jiao, Da-Peng Zhang, Kun Xia, Le-Feng Wang, Xin-Chun Yang
Background: This study aims to investigate the clinical and angiographic features in patients with acute myocardial infarction (AMI) induced by coronary artery embolism. Methods: Clinical data of five patients with AMI induced by coronary artery embolism were analyzed retrospectively. Results: One patient had left atrial myxoma, one patient had non-valvular atrial fibrillation, and three patients had rheumatic heart disease. Furthermore, one patient had mitral mechanical valve prostheses, two patients had atrial fibrillation...
September 2017: Journal of Thoracic Disease
https://www.readbyqxmd.com/read/29188813/valvular-disease-mechanical-versus-biological-valve-prostheses
#19
Gregory B Lim
No abstract text is available yet for this article.
January 2018: Nature Reviews. Cardiology
https://www.readbyqxmd.com/read/29181045/late-subclinical-hemolysis-and-long-term-outcomes-after-aortic-valve-replacement-with-on-x-mechanical-prostheses-a-preliminary-single-center-report
#20
Bartłomiej Perek, Sylwia Sławek, Agnieszka Malińska, Izabela Katyńska, Mateusz Puślecki, Bogumiła Szymak-Pawełczyk, Michał Nowicki, Marek Jemielity
Introduction: Aortic valve replacement (AVR) with a mechanical prosthesis is not free from late complications. Aim: To evaluate the prevalence of subclinical hemolysis after AVR with On-X prostheses and assess its impact on long-term outcomes. Material and methods: The prospective study included 84 consecutive patients aged 58.3 ±10.3 years who underwent AVR. They were retrospectively split into group H ( n = 12; 14.3%) with prosthesis-related subclinical hemolysis and a control group (C; n = 72; 85...
September 2017: Kardiochirurgia i Torakochirurgia Polska, Polish Journal of Cardio-Thoracic Surgery
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