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Prosthetic heart valve

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https://www.readbyqxmd.com/read/29457259/prosthetic-mitral-valve-thrombosis-malfunction-and-paroxysmal-mitral-regurgitation
#1
Nagaraja Moorthy, Rajiv Ananthakrishna, Dattatreya P V Rao, Satvic C Manjunath, Manjunath C Nanjappa
Intermittent dysfunction of mechanical mitral valve prosthesis is an uncommon condition. It carries serious clinical implications if unrecognized. Here, we present a case of a 28-year-old female with a history of rheumatic multivalvular disease, for which she had undergone double valve replacement and tricuspid annuloplasty. Six months later, she presented with heart failure. Clinical examination revealed intermittent loss of closing clicks followed by a pansystolic murmur at the apex, suggestive of mitral prosthetic valve dysfunction...
February 19, 2018: Echocardiography
https://www.readbyqxmd.com/read/29456228/-suttonella-indologenes-peritonitis-in-a-patient-receiving-continuous-ambulatory-peritoneal-dialysis
#2
Nurhayat Ozkan Sevencan, Serkan Bakirdogen, Adem Adar, Burcak Kayhan
Suttonella indologenes is a Gram-negative, aerobic coccobacillus of Cardiobacteriaceae family and its natural habitat is the mucous membranes of the upper respiratory system. The literature includes limited number of case reports concerning fatal endocarditis due to infection in the prosthetic heart valves caused by the aforementioned microorganism. However, there is no information on extracardiac involvement due to this microorganism. Here, we present a peritonitis case caused by Suttonella indologenes in a patient receiving continuous ambulatory peritoneal dialysis...
January 2018: Saudi Journal of Kidney Diseases and Transplantation
https://www.readbyqxmd.com/read/29436886/anti-xa-based-dose-changes-during-low-molecular-weight-heparin-anticoagulation-for-mechanical-prosthetic-heart-valves-during-pregnancy
#3
Eleanor Snape, Jecko Thachil, Bernard Clarke, Sarah Vause
No abstract text is available yet for this article.
February 13, 2018: Journal of Obstetrics and Gynaecology: the Journal of the Institute of Obstetrics and Gynaecology
https://www.readbyqxmd.com/read/29432364/per-ventricular-insertion-of-melody-valve-in-valve-in-the-neoaortic-position-in-a-single-ventricle-patient
#4
Nicholas S Clarke, Howaida El-Said, John J Lamberti, Raghav A Murthy
Percutaneous therapies for congenital heart disease have been evolving rapidly despite limited investment from industry. The Melody transcatheter pulmonary valve (Medtronic, Inc, Minneapolis, MN USA) replacement therapy represents an important advancement in this arena. It has been approved in the United States for use in the pulmonary position, on a Humanitarian Device Exemption status. Off-label use of the Melody transcatheter pulmonary valve has extended to the mitral, pulmonary, and aortic valves, especially in previously implanted valves with prosthetic valve degeneration...
February 9, 2018: Innovations: Technology and Techniques in Cardiothoracic and Vascular Surgery
https://www.readbyqxmd.com/read/29409618/outcome-of-tricuspid-valve-surgery-in-the-presence-of-permanent-pacemaker
#5
Nishant Saran, Sameh M Said, Hartzell V Schaff, Simon Maltais, John M Stulak, Kevin L Greason, Richard C Daly, Alberto Pochettino, Katherine S King, Joseph A Dearani
OBJECTIVES: Given the paucity of available literature, we sought to evaluate the mechanisms of tricuspid regurgitation and the outcomes of tricuspid valve surgery in the presence of permanent pacemakers. METHODS: We retrospectively reviewed the records of 622 adult patients who underwent tricuspid valve surgery in the presence of permanent pacemakers between January 1993 and December 2013. Those with prosthetic tricuspid valve or tricuspid valve endocarditis and those undergoing concomitant heart transplant were excluded (n = 23)...
December 19, 2017: Journal of Thoracic and Cardiovascular Surgery
https://www.readbyqxmd.com/read/29397446/marseille-scoring-system-for-empiric-treatment-of-infective-endocarditis
#6
Frédérique Gouriet, Hervé Tissot-Dupont, Jean-Paul Casalta, Sandrine Hubert, Pierre-Edouard Fournier, Sophie Edouard, Alexis Theron, Hubert Lepidi, Dominique Grisoli, Gilbert Habib, Didier Raoult
Despite advances in medical, surgical, and critical care, infective endocarditis (IE) remains associated with considerable morbidity and mortality. We evaluated the performance of the Marseille score, including clinical data and biological tests obtained within 2 h, to identify patients at high risk of IE in order to initiate early antimicrobial treatment. This was secondarily confirmed using modified ESC criteria combined with molecular testing and (18)fluorodeoxyglucose-positron emission tomography/computed tomography as diagnostic tools...
February 3, 2018: European Journal of Clinical Microbiology & Infectious Diseases
https://www.readbyqxmd.com/read/29367953/pulsed-cavitational-ultrasound-softening-a-new-non-invasive-therapeutic-approach-of-calcified-bioprosthetic-valve-stenosis
#7
Olivier Villemain, Justine Robin, Alain Bel, Wojciech Kwiecinski, Patrick Bruneval, Bastien Arnal, Mathieu Rémond, Mickael Tanter, Emmanuel Messas, Mathieu Pernot
Background: The majority of prosthetic heart valves currently implanted are tissue valves that can be expected to calcify with time and eventually fail. Surgical or percutaneous redux valve replacement is associated with higher rate of complications. We propose a novel non-invasive therapeutic approach based on the use of pulsed cavitational ultrasound (PCU) to improve the valvular function of degenerative calcified bioprosthesis. Objectives: Our study aims to demonstrate in vitro and in vivo on an ovine model that PCU can significantly improve the bioprosthesis opening by softening remotely the calcified stiff cusps...
August 2017: JACC. Basic to Translational Science
https://www.readbyqxmd.com/read/29366576/redefinition-of-tricuspid-valve-structures-for-successful-ring-annuloplasty
#8
Noriyasu Kawada, Hirokuni Naganuma, Koichi Muramatsu, Hatsue Ishibashi-Ueda, Ko Bando, Kazuhiro Hashimoto
BACKGROUND: Although numerous reports have described suturing techniques for tricuspid annuloplasty, most studies were not based on a detailed anatomy of the tricuspid annulus. Thus, the definition of the tricuspid commissures remains unclear. This study aimed to clearly define the commissures and leaflets of the tricuspid valve and subvalvular structures, and to define a standard method for tricuspid annuloplasty. METHODS: In 27 normal heart specimens without cardiac disease, the tricuspid commissure was defined using indentations of the leaflets as a point, not an area, and the length of each tricuspid annulus was measured...
December 19, 2017: Journal of Thoracic and Cardiovascular Surgery
https://www.readbyqxmd.com/read/29351615/18f-fluorodeoxyglucose-positron-emission-computed-tomography-and-computed-tomography-angiography-in-prosthetic-heart-valve-endocarditis-from-guidelines-to-clinical-practice
#9
Laurens E Swart, Asbjørn M Scholtens, Wilco Tanis, Koen Nieman, Ad J J C Bogers, Fred J Verzijlbergen, Gabriel P Krestin, Jolien W Roos-Hesselink, Ricardo P J Budde
The timely diagnosis of prosthetic heart valve endocarditis remains challenging yet of utmost importance. 18F-fluorodeoxyglucose (18 F-FDG) positron emission/computed tomography (PET/CT) and cardiac computed tomography angiography (CTA) were recently introduced as additional diagnostic tools in the most recent ESC guidelines on infective endocarditis. However, how to interpret PET/CT findings with regard to what is to be considered abnormal, what the potential confounders may be, as well as which patients benefit most from these additional imaging techniques and how to best perform them in these often-complex patients, remains unclear...
January 16, 2018: European Heart Journal
https://www.readbyqxmd.com/read/29339678/endarteritis-of-coarctation-of-the-aorta-diagnosed-with-pet-ct
#10
Ümit Yaşar Sinan, Burcu Dirlik Serim, Rukiye Yıldırım, Özge Çetinarslan, Mehmet Serdar Küçükoğlu
Infective endocarditis (IE) is an infectious disease that affects the endothelium of the large intrathoracic vessels, heart valves, and intra-cardiac foreign body material. A 20-year-old woman was admitted to the cardiology department with complaints of fever and palpitations. Transthoracic echocardiography revealed a bicuspid aortic valve, aortic root enlargement, and aortic coarctation. Transesophageal echocardiography revealed a bicuspid aortic valve, but there was no vegetation. Methicillin-sensitive Staphylococcus aureus was identified on a blood culture...
January 2018: Türk Kardiyoloji Derneği Arşivi: Türk Kardiyoloji Derneğinin Yayın Organıdır
https://www.readbyqxmd.com/read/29327671/tissue-engineered-heart-valves-a-call-for-mechanistic-studies
#11
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/29322379/attenuation-correction-and-metal-artifact-reduction-in-fdg-pet-ct-for-prosthetic-heart-valve-and-cardiac-implantable-device-endocarditis
#12
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/29317805/compression-of-the-right-coronary-artery-by-an-aortic-pseudoaneurysm-after-infective-endocarditis-an-unusual-case-of-myocardial-ischemia
#13
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/29309568/paravalvular-leakage-in-patients-with-prosthetic-heart-valves-cardiac-computed-tomography-findings-and-clinical-features
#14
Hyun Jung Koo, Joo Yeon Lee, Gun Ha Kim, Joon-Won Kang, Young-Hak Kim, Dae-Hee Kim, Jong-Min Song, Duk-Hyun Kang, Jae-Kwan Song, Tae-Hwan Lim, Dong Hyun Yang
Aims: Morphological characteristics of paravalvular leakage (PVL) have not yet been well characterized by computed tomography (CT). The purpose of this study was to demonstrate the morphological characteristics of PVLs using cardiac CT in patients diagnosed with PVL. Methods and results: Between May 2011 and December 2013, 46 patients who had been diagnosed with PVL and underwent cardiac CT were included in this study. On CT, the characteristics of PVLs including number, size, location, and shape are described...
January 4, 2018: European Heart Journal Cardiovascular Imaging
https://www.readbyqxmd.com/read/29305610/flow-structure-interaction-simulations-of-the-aortic-heart-valve-at-physiologic-conditions-the-role-of-tissue-constitutive-model
#15
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
#16
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
#17
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/29284450/cardiovascular-magnetic-resonance-in-the-evaluation-of-heart-valve-disease
#18
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/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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