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Prosthetic Valve

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https://www.readbyqxmd.com/read/29330034/successful-treatment-of-a-penicillin-intermediate-and-ceftriaxone-resistant-granulicatella-adiacens-presumed-prosthetic-valve-endocarditis-with-vancomycin
#1
Bruce M Jones, Roby M Hersey, Irwin J Trestman, Christopher M Bland
Advancements in rapid diagnostics have helped to identify nutritionally variant streptococci (NVS) as an increasing cause of infective endocarditis. This case report highlights the challenges in susceptibility testing and the importance of appropriate empiric treatment for Granulicatella adiacens, as well as considerations for future practice guideline recommendations. Guidelines for treatment of IE caused by NVS are currently limited to patients with native valve disease. We present a patient with presumed prosthetic valve endocarditis caused by Granulicatella adiacens, with clinically relevant resistance to recommended first-line agents (penicillin and ceftriaxone), who was successfully treated with 8 weeks of intravenous (IV) vancomycin...
January 9, 2018: International Journal of Antimicrobial Agents
https://www.readbyqxmd.com/read/29327671/tissue-engineered-heart-valves-a-call-for-mechanistic-studies
#2
Kevin Blum, Joseph Drews, Christopher K Breuer
Heart valve disease carries a substantial risk of morbidity and mortality. Outcomes are significantly improved by valve replacement, but currently-available mechanical and biological replacement valves are associated with complications of their own. Mechanical valves have a high rate of thromboembolism and require lifelong anticoagulation. Biological prosthetic valves have a much shorter lifespan, and are prone to tearing and degradation. Both types of valves lack the capacity for growth, making them particularly problematic in pediatric patients...
January 12, 2018: Tissue Engineering. Part B, Reviews
https://www.readbyqxmd.com/read/29325812/transcatheter-mitral-valve-replacement-in-mitral-annulus-calcification-the-art-of-computer-simulation
#3
Júlia Karády, Ioannis Ntalas, Bernard Prendergast, Christopher Blauth, Steven Niederer, Pál Maurovich-Horvat, Ronak Rajani
There is considerable interest in transcatheter prosthetic valve treatment for mitral valve disease in high-risk individuals. Although the presence of mitral annular calcium (MAC) may provide an anchoring zone for such devices, results to date have been modest with reported technical failure rates approaching 30% in specialist centers. This in part relates to the risk of left ventricular outflow tract obstruction and device dislodgment but also to the lack of specific imaging guidelines to plan for such procedures...
January 4, 2018: Journal of Cardiovascular Computed Tomography
https://www.readbyqxmd.com/read/29325103/twenty-year-experience-with-stentless-biological-aortic-valve-and-root-replacement-informing-patients-of-risks-and-benefits
#4
Adriaan W Schneider, Hein Putter, Mark G Hazekamp, Eduard R Holman, Eline F Bruggemans, Michel I M Versteegh, Martin J Schalij, Rens R B Varkevisser, Robert J M Klautz, Jerry Braun
OBJECTIVES: The aim of this study was to provide predictive data on the performance of the Freestyle stentless bioprosthesis that can be used to support and improve the shared decision-making process of prosthetic valve choice for aortic valve replacement. METHODS: Between 1993 and 2014, 604 patients received the Freestyle stentless bioprosthesis (143 subcoronary, 58 root inclusion and 403 full-root replacement). Perioperative data were collected retrospectively, and follow-up data were collected prospectively from 2015...
January 6, 2018: European Journal of Cardio-thoracic Surgery
https://www.readbyqxmd.com/read/29322379/attenuation-correction-and-metal-artifact-reduction-in-fdg-pet-ct-for-prosthetic-heart-valve-and-cardiac-implantable-device-endocarditis
#5
Asbjørn M Scholtens, Hein J Verberne
No abstract text is available yet for this article.
January 10, 2018: Journal of Nuclear Cardiology: Official Publication of the American Society of Nuclear Cardiology
https://www.readbyqxmd.com/read/29321802/early-prosthetic-valve-endocarditis-after-transcatheter-aortic-valve-implantation-with-periannular-complication
#6
Emmanouil Chourdakis, Ioanna Koniari, George Hahalis, Nicholas G Kounis, Karl Eugen Hauptmann
No abstract text is available yet for this article.
November 2017: Journal of Geriatric Cardiology: JGC
https://www.readbyqxmd.com/read/29317805/compression-of-the-right-coronary-artery-by-an-aortic-pseudoaneurysm-after-infective-endocarditis-an-unusual-case-of-myocardial-ischemia
#7
Juan Lacalzada-Almeida, Alejandro De la Rosa-Hernández, María Manuela Izquierdo-Gómez, Javier García-Niebla, Iván Hernández-Betancor, Juan Alfonso Bonilla-Arjona, Antonio Barragán-Acea, Ignacio Laynez-Cerdeña
A 61-year-old male with a prosthetic St Jude aortic valve size 24 presented with heart failure symptoms and minimal-effort angina. Eleven months earlier, the patient had undergone cardiac surgery because of an aortic root dilatation and bicuspid aortic valve with severe regurgitation secondary to infectious endocarditis by Coxiela burnetii and coronary artery disease in the left circumflex coronary artery. Then, a prosthesis valve and a saphenous bypass graft to the left circumflex coronary artery were placed...
2018: Clinical Interventions in Aging
https://www.readbyqxmd.com/read/29313791/dilemmas-in-dual-disease-complexity-and-futility-in-prosthetic-valve-endocarditis-and-substance-use-disorder
#8
James N Kirkpatrick, Jason W Smith
No abstract text is available yet for this article.
January 2018: American Journal of Bioethics: AJOB
https://www.readbyqxmd.com/read/29310727/errors-in-diagnosis-of-infective-endocarditis
#9
H R Naderi, F Sheybani, S S Erfani
Infective endocarditis (IE) is now the third or fourth most common life-threatening infectious disease. The high morbidity and mortality rates in the absence of appropriate care necessitate a thorough understanding of the obstacles towards the early diagnosis and management of IE. The aim of this study was to evaluate the frequency of discrepancy in diagnosis (i.e. discrepancy between the reason for admission and discharge diagnosis) and associated factors in patients with IE. It was a retrospective review of hospital records of all adult patients admitted in a 1000-bed academic general hospital in Mashhad, Iran with the discharge diagnosis of IE...
January 9, 2018: Epidemiology and Infection
https://www.readbyqxmd.com/read/29306545/clinical-significance-of-ejection-dynamics-parameters-in-patients-with-aortic-stenosis-an-outcome-study
#10
Anne Ringle Griguer, Christophe Tribouilloy, Ariane Truffier, Anne-Laure Castel, François Delelis, Franck Levy, André Vincentelli, Yohann Bohbot, Sylvestre Maréchaux
BACKGROUND: Ejection dynamics parameters are useful in assessing prosthetic valve obstruction, but very limited data are available in the setting of native aortic stenosis (AS). The aim of this study was to evaluate and compare the prognostic value of acceleration time (AT) and the ratio of AT to ejection time (ET) in patients with AS. METHODS: AT and AT/ET were prospectively measured in 456 patients with AS (aortic valve area < 1.3 cm2; mean aortic valve area, 0...
January 3, 2018: Journal of the American Society of Echocardiography
https://www.readbyqxmd.com/read/29305610/flow-structure-interaction-simulations-of-the-aortic-heart-valve-at-physiologic-conditions-the-role-of-tissue-constitutive-model
#11
Anvar Gilmanov, Henryk Stolarski, Fotis Sotiropoulos
The blood flow patterns in the region around the aortic valve depend on the geometry of the aorta and on the complex flow-structure interaction between the pulsatile flow and the valve leaflets. Consequently, the flow depends strongly on the constitutive properties of the tissue, which can be expected to vary between healthy and diseased heart valves or native and prosthetic valves. In this work we seek to demonstrate the role of tissue constitutive model on aortic valve hemodynamics. We employ the Curvilinear Immersed Boundary - Finite Element - Fluid Structure Interaction (CURVIB-FE-FSI) method developed by Gilmanov et al...
January 5, 2018: Journal of Biomechanical Engineering
https://www.readbyqxmd.com/read/29304530/alteration-of-von-willebrand-factor-after-transcatheter-aortic-valve-replacement-in-the-absence-of-paravalvular-regurgitation
#12
Felix Pawlitschek, Cornelius Keyl, Barbara Zieger, Ulrich Budde, Friedhelm Beyersdorf, Franz-Josef Neumann, Christian Stratz, Thomas G Nührenberg, Dietmar Trenk
Moderate or severe paravalvular regurgitation after transcatheter aortic valve implantation (TAVI) is frequently associated with a loss of high-molecular-weight multimers of von Willebrand factor (VWF) and a reduced VWF collagen-binding capacity. It is unclear whether this phenomenon can also be observed in patients with mild paravalvular regurgitation, and whether there are differences between patients undergoing conventional aortic valve replacement (AVR) or TAVI. We analysed the multimeric structure of VWF and the ratio of VWF collagen-binding capacity to VWF antigen pre- and postoperatively in 12 patients scheduled for AVR and in 31 patients scheduled for TAVI...
January 2018: Thrombosis and Haemostasis
https://www.readbyqxmd.com/read/29302946/the-role-of-protein-z-and-protein-z-dependent-protease-inhibitor-polymorphisms-in-the-development-of-prosthetic-heart-valve-thrombosis
#13
Süleyman Karakoyun, Mustafa Ozan Gürsoy, Macit Kalçık, Mahmut Yesin, Sabahattin Gündüz, Mehmet Ali Astarcıoğlu, Zübeyde Bayram, Beytullah Çakal, Emrah Bayam, Mehmet Özkan
BACKGROUND: Protein Z (PZ) is a vitamin K-dependent factor that is synthesized mainly by the liver. It acts as an activator of serpin, the protein Z-dependent inhibitor (ZPI), which inhibits factor Xa. The potential role of alterations in protein Z and/or ZPI levels in the pathogenesis of thrombotic and/or hemorrhagic diseases has been previously investigated, but results have been conflicting. The study aim was to evaluate the role of PZ/ZPI polymorphisms in the development of prosthetic valve thrombosis (PVT)...
July 2017: Journal of Heart Valve Disease
https://www.readbyqxmd.com/read/29302938/long-term-results-of-aortic-root-surgery-in-marfan-syndrome-patients-a-single-center-experience
#14
Francesco Nicolo, Francesco Romeo, Antonio Lio, Emanuele Bovio, Antonio Scafuri, Carlo Bassano, Patrizio Polisca, Antonio Pellegrino, Paolo Nardi, Luigi Chiariello, Giovanni Ruvolo
BACKGROUND: The study aim was to compare long-term results of Marfan syndrome (MFS) patients affected by aortic root disease undergoing aortic root replacement with the Bentall or David operation. METHODS: Since 1994, a total of 59 patients has been followed at the authors' Marfan Center, having undergone either a Bentall operation (Bentall group, n = 30) or a David operation (David group, n = 29). RESULTS: No operative mortality was recorded...
July 2017: Journal of Heart Valve Disease
https://www.readbyqxmd.com/read/29300071/mitral-valve-annuloplasty
#15
Benedetto Del Forno, Alessandro Castiglioni, Alessandra Sala, Alberto Geretto, Andrea Giacomini, Paolo Denti, Michele De Bonis, Ottavio Alfieri
Mitral valve prosthetic ring annuloplasty represents a key milestone in the history of mitral valve repair, delivering restoration of annular shape and size. Increased leaflet coaptation, together with significant reduction in stress on sutures, has ensured predictability and immediate stability for valve repair, both of which were lacking with previous techniques. Long-term durability of repair seems to be positively affected by placement of an annuloplasty ring, and by following the well-established, standardized approach described in our tutorial, this procedure can be performed with a very low surgical risk...
October 6, 2017: Multimedia Manual of Cardiothoracic Surgery: MMCTS
https://www.readbyqxmd.com/read/29296269/clinicomicrobiological-spectrum-of-infective-endocarditis-from-a-tertiary-care-centre-in-south-india
#16
Kanne Padmaja, Sukanya Sudhaharan, Lakshmi Vemu, Oruganti Sai Satish, Padmasri Chavali, Mamidi Neeraja
Background and Objectives: Infective endocarditis (IE) is a microbial infection of the endothelial surface of the cardiac-valves. Rapid diagnosis, effective treatment and prompt recognition of complications are essential, in order to improve the outcome. We retrospectively reviewed and determined the clinical characteristics, microbiological profile and management strategies of IE cases, changing microbial spectrum of pathogens and outcome in Native Valve Endocarditis (NVE) and Prosthetic Valve Endocarditis (PVE) cases...
October 2017: Iranian Journal of Microbiology
https://www.readbyqxmd.com/read/29284450/cardiovascular-magnetic-resonance-in-the-evaluation-of-heart-valve-disease
#17
REVIEW
G S Gulsin, A Singh, G P McCann
BACKGROUND: Over the last 25 years, cardiovascular magnetic resonance imaging (CMR) has emerged as an alternative to echocardiography for assessment of valvular heart disease (VHD). Although echo remains the first-line imaging modality for the assessment of patients with VHD, CMR can now provide a comprehensive assessment in many instances. Using a combination of techniques, CMR provides information on valve anatomy and enables quantitative analysis of the severity of the valve lesion...
December 29, 2017: BMC Medical Imaging
https://www.readbyqxmd.com/read/29284171/post-tavi-follow-up-with-mdct-of-the-valve-prosthesis-technical-application-regular-findings-and-typical-local-post-interventional-complications
#18
Martin Soschynski, Fabio Capilli, Philipp Ruile, Franz-Josef Neumann, Mathias Langer, Tobias Krauss
BACKGROUND:  Transcatheter aortic valve implantation (TAVI) has evolved into an alternative procedure to surgical valve replacement for high-risk patients with aortic valve stenosis. Despite technical innovations, there is still a risk of complications during and after the intervention. After a TAVI procedure, ECG-gated multidetector computed tomography (MDCT) plays an important role in the early diagnosis of local complications. In this article, we explain for the first time how the technical acquisition of MDCT in the region of the aortic root is performed as post-interventional control of the TAVI prosthesis...
December 28, 2017: RöFo: Fortschritte Auf Dem Gebiete der Röntgenstrahlen und der Nuklearmedizin
https://www.readbyqxmd.com/read/29280157/native-bovine-and-porcine-pericardia-respond-to-load-with-additive-recruitment-of-collagen-fibers
#19
Andrea Bagno, Paola Aguiari, Michele Fiorese, Laura Iop, Michele Spina, Gino Gerosa
Bovine and porcine pericardia are currently used for manufacturing prosthetic heart valves: their design has become an increasingly important area of investigation in parallel with progressively expanding indications for the transcutaneous approach to heart valves replacement. Before being cut and shaped, pericardial tissues are expected to be properly characterized. Actually, the mechanical assessment of these biomaterials lacks standardized protocols. In particular, the role of preconditioning for achieving a constant mechanical response of tissue samples is still controversial...
December 27, 2017: Artificial Organs
https://www.readbyqxmd.com/read/29277931/percutaneous-pulmonary-valve-implantation-in-grown-up-congenital-heart-disease-patients-insights-from-the-zurich-experience
#20
Luca Oechslin, Roberto Corti, Matthias Greutmann, Oliver Kretschmar, Oliver Gaemperli
OBJECTIVES: The aim of the study was to assess indications, procedural success, complications, echocardiographic, and clinical outcomes of percutaneous pulmonary valve implantation (PPVI) in adult patients with congenital heart disease (CHD). BACKGROUND: PPVI offers a non-surgical treatment option for failing prosthetic conduits in pulmonary position. However, efficacy and clinical outcomes after PPVI are still underreported. METHODS: From January 2008 to March 2016, 25 adult CHD patients with right ventricular outflow tract (RVOT) stenosis and/or pulmonary regurgitation underwent PPVI in our institution...
December 25, 2017: Journal of Interventional Cardiology
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