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https://www.readbyqxmd.com/read/28736923/applications-of-additive-manufacturing-in-dentistry-a-review
#1
REVIEW
Aishwarya Bhargav, Vijayavenkatraman Sanjairaj, Vinicius Rosa, Lu Wen Feng, Jerry Fuh Yh
Additive manufacturing (AM) or 3D printing has been hailed as the third industrial revolution as it has caused a paradigm shift in the way objects have been manufactured. Conventionally, converting a raw material to a fully finished and assembled, usable product comprises several steps which can be eliminated by using this process as functional products can be created directly from the raw material at a fraction of the time originally consumed. Thus, AM has found applications in several sectors including automotive, aerospace, printed electronics, and healthcare...
July 24, 2017: Journal of Biomedical Materials Research. Part B, Applied Biomaterials
https://www.readbyqxmd.com/read/28734430/transcatheter-aortic-valve-implantation-under-direct-visualization-in-homograft-valve-endocarditis
#2
Tarek Chami, Guilherme Attizzani, Benjamin Medalion, Salil V Deo
Prosthetic valve endocarditis is a very grave and often terminal disease. Surgical valve replacement remains the cornerstone treatment for this disease. However, it is often contraindicated. Herein, we describe the implantation under direct visualization of a self-expandable transcatheter heart valve in a prohibitive surgical risk patient with homograft aortic valve endocarditis.
August 2017: Annals of Thoracic Surgery
https://www.readbyqxmd.com/read/28722138/a-red-blood-cell-model-to-estimate-the-hemolysis-fingerprint-of-cardiovascular-devices
#3
Riccardo Toninato, Giuseppe Fadda, Francesca Maria Susin
One of the most relevant and open issues within cardiovascular prosthetic hemodynamic performance is a realistic quantification of the damage sustained by red blood cells (RBCs). Specifically, the optimal design of bileaflet mechanical heart valves (BMHVs) requires both low shear stresses along the leaflets and short particle resident times. This study approaches RBC damage estimation by developing a numerical model of RBCs and computing the damage sustained by a set of passive RBCs immersed within in vitro flows...
July 19, 2017: Artificial Organs
https://www.readbyqxmd.com/read/28719311/infective-endocarditis-in-french-west-indies-a-13-year-observational-study
#4
Elisabeth Fernandes, Claude Olive, Jocelyn Inamo, François Roques, André Cabié, Patrick Hochedez
We conducted an observational study to describe the characteristics of infective endocarditis (IE) in French West Indies (FWI) and to identify variables associated with in-hospital case fatality. The records of the patients admitted for IE to the University Hospital of Martinique between 2000 and 2012 were collected using an electronic case report form. Only Duke-Li definite cases were considered for this analysis. Variables associated with in-hospital mortality were tested using univariate logistic regression analysis...
July 2017: American Journal of Tropical Medicine and Hygiene
https://www.readbyqxmd.com/read/28716099/xenoantigenicity-of-porcine-decellularized-valves
#5
Meghana R K Helder, Nicholas J Stoyles, Brandon J Tefft, Ryan S Hennessy, Rebecca R C Hennessy, Roy Dyer, Tyra Witt, Robert D Simari, Amir Lerman
BACKGROUND: The xenoantigenicity of porcine bioprosthetic valves is implicated as an etiology leading to calcification and subsequent valve failure. Decellularization of porcine valves theoretically could erase the antigenicity of the tissue leading to more durable prosthetic valves, but the effectiveness of decellularization protocols in regard to completely removing antigens has yet to be verified. Our hypothesis was that decellularization would remove the more abundant α-gal antigens but not remove all the non α-gal antigens, which could mount a response...
July 17, 2017: Journal of Cardiothoracic Surgery
https://www.readbyqxmd.com/read/28714498/chondrodysplasia-punctata-a-case-report-of-fetal-warfarin-syndrome
#6
S Songmen, O B Panta, S S Paudel, R K Ghimire
Chondrodysplasia punctata is abnormal calcification in the cartilage of developing bones and has been seen in association with deranged vitamin K metabolism. Warfarin, an oral anticoagulant acting on vitamin K dependent clotting factors is known to cause chondrodysplasia punctata. Despite the knowledge of the condition the management of patients with prosthetic heart valves might require use of the drug for anticoagulation. Here, we present a case of a fetal warfarin syndrome in a second born child of a 27 year lady under warfarin for prosthetic heart valve...
January 2017: Journal of Nepal Health Research Council
https://www.readbyqxmd.com/read/28713108/current-prescribing-practices-for-antibiotic-prophylaxis-a-survey-of-dental-practitioners
#7
Leah S Spittle, Kathleen B Muzzin, Patricia R Campbell, Janice P DeWald, Francisco Rivera-Hidalgo
AIM: Antibiotic prophylaxis guidelines have been developed for health care and dentistry. The authors examined whether dentists were following the 2007 American Heart Association (AHA) and the 2012 American Association of Orthopaedic Surgeons (AAOS) recommendations for antibiotic prophylaxis. MATERIALS AND METHODS: A survey was sent to 600 dentists in the south-central region of the United States. The survey examined dentists' prescribing practices for patients with cardiac and prosthetic joint replacements, antibiotic regimen prescribed, confidence in their prescription decisions, and dentistry's contribution to antibiotic resistance...
July 1, 2017: Journal of Contemporary Dental Practice
https://www.readbyqxmd.com/read/28713024/to-retrieve-or-not-to-retrieve-system-revisions-with-the-micra-transcatheter-pacemaker
#8
Eric Grubman, Philippe Ritter, Christopher R Ellis, Michael Giocondo, Ralph Augostini, Petr Neuzil, Bipin Ravindran, Anshul M Patel, Pamela Omdahl, Karen Pieper, Kurt Stromberg, J Harrison Hudnall, Dwight Reynolds
BACKGROUND: Early experience with leadless pacemakers has shown a low rate of complications. However, little is known about system revision in patients with these devices. OBJECTIVE: To describe the system revision experience with the Micra Transcatheter Pacing System (TPS). METHODS: Implanted patients from the Micra TPS and the Micra Continued Access study (N = 989) were analyzed and compared to 2667 patients with transvenous pacemakers (TVP)...
July 13, 2017: Heart Rhythm: the Official Journal of the Heart Rhythm Society
https://www.readbyqxmd.com/read/28711585/global-outbreak-of-severe-mycobacterium-chimaera-disease-after-cardiac-surgery-a-molecular-epidemiological-study
#9
Jakko van Ingen, Thomas A Kohl, Katharina Kranzer, Barbara Hasse, Peter M Keller, Anna Katarzyna Szafrańska, Doris Hillemann, Meera Chand, Peter Werner Schreiber, Rami Sommerstein, Christoph Berger, Michele Genoni, Christian Rüegg, Nicolas Troillet, Andreas F Widmer, Sören L Becker, Mathias Herrmann, Tim Eckmanns, Sebastian Haller, Christiane Höller, Sylvia B Debast, Maurice J Wolfhagen, Joost Hopman, Jan Kluytmans, Merel Langelaar, Daan W Notermans, Jaap Ten Oever, Peter van den Barselaar, Alexander B A Vonk, Margreet C Vos, Nada Ahmed, Timothy Brown, Derrick Crook, Theresa Lamagni, Nick Phin, E Grace Smith, Maria Zambon, Annerose Serr, Tim Götting, Winfried Ebner, Alexander Thürmer, Christian Utpatel, Cathrin Spröer, Boyke Bunk, Ulrich Nübel, Guido V Bloemberg, Erik C Böttger, Stefan Niemann, Dirk Wagner, Hugo Sax
BACKGROUND: Since 2013, over 100 cases of Mycobacterium chimaera prosthetic valve endocarditis and disseminated disease were notified in Europe and the USA, linked to contaminated heater-cooler units (HCUs) used during cardiac surgery. We did a molecular epidemiological investigation to establish the source of these patients' disease. METHODS: We included 24 M chimaera isolates from 21 cardiac surgery-related patients in Switzerland, Germany, the Netherlands, and the UK, 218 M chimaera isolates from various types of HCUs in hospitals, from LivaNova (formerly Sorin; London, UK) and Maquet (Rastatt, Germany) brand HCU production sites, and unrelated environmental sources and patients, as well as eight Mycobacterium intracellulare isolates...
July 12, 2017: Lancet Infectious Diseases
https://www.readbyqxmd.com/read/28706868/tricuspid-valve-endocarditis
#10
Syed T Hussain, James Witten, Nabin K Shrestha, Eugene H Blackstone, Gösta B Pettersson
Right-sided infective endocarditis (RSIE) is less common than left-sided infective endocarditis (IE), encompassing only 5-10% of cases of IE. Ninety percent of RSIE involves the tricuspid valve (TV). Given the relatively small numbers of TVIE cases operated on at most institutions, the purpose of this review is to highlight and discuss the current understanding of IE involving the TV. RSIE and TVIE are strongly associated with intravenous drug use (IVDU), although pacemaker leads, defibrillator leads and vascular access for dialysis are also major risk factors...
May 2017: Annals of Cardiothoracic Surgery
https://www.readbyqxmd.com/read/28705798/a-mass-obstructing-mechanical-prosthetic-heart-valve-thrombus-or-pannus
#11
Kunal Mahajan, Sanjeev Asotra, Prakash Negi, Prince Kumar Paul
No abstract text is available yet for this article.
July 13, 2017: BMJ Case Reports
https://www.readbyqxmd.com/read/28697893/mechanical-valves-in-the-pulmonary-position-an-international-retrospective-analysis
#12
Hanna Pragt, Joost P van Melle, Hoda Javadikasgari, Dong Man Seo, John M Stulak, Igor Knez, Jürgen Hörer, Christian Muñoz-Guijosa, Mahyar G Dehaki, Hong Ju Shin, Joseph A Dearani, Maziar G Dehaki, Petronella G Pieper, Christine Eulenburg, Laura Dos, Tjark Ebels
OBJECTIVE: Life expectancy of patients with congenital heart disease has improved over the past decades, increasing the need for a durable pulmonary prosthetic valve. Biological valves in various forms have become the valve of choice for pulmonary valve replacement (PVR), but structural valve deterioration is unavoidable in the long term. Use of a mechanical valve could be an alternative, but data on long-term outcomes are sparse. METHODS: We retrospectively collected and analyzed data on 364 patients with mechanical valves implanted in the pulmonary position between 1965 and 2014...
May 20, 2017: Journal of Thoracic and Cardiovascular Surgery
https://www.readbyqxmd.com/read/28695557/impact-of-new-technologies-and-experience-on-procedural-aspects-of-surgical-aortic-valve-replacement-a-process-analysis
#13
Bettina Langhammer, Maria Nucera, Lars Englberger, Eva Roost, David Reineke, Florian Schönhoff, Henriette Most, Bernhard Winkler, Fabian Gisler, Thierry Carrel, Christoph Huber
BACKGROUND: Surgical aortic valve replacement (SAVR) is the treatment of choice in severe symptomatic aortic valve disease. New techniques and prostheses have been recently developed to facilitate the procedure and reduce aortic cross-clamp time (AOx). The aim of this study was to analyse the different procedural steps in order to identify the most time-consuming part during aortic clamping time and to compare impact of experience on procedural aspects. METHODS: AOx during SAVR was divided into five consecutive steps...
July 11, 2017: Swiss Medical Weekly
https://www.readbyqxmd.com/read/28691911/a-novel-synchronized-diastolic-injection-method-to-reduce-contrast-volume-during-aortography-for-aortic-regurgitation-assessment-in-vitro-experiment-of-a-transcatheter-heart-valve-model
#14
Yosuke Miyazaki, Mohammad Abdelghani, Ellen S de Boer, Jean-Paul Aben, Math van Sloun, Todd Suchecki, Marcel van 't Veer, Carlos Collet, Taku Asano, Yuki Katagiri, Erhan Tenekecioglu, Osama I I Soliman, Yoshinobu Onuma, Robbert de Winter, Pim Tonino, Frans N van de Vosse, Marcel C M Rutten, Patrick W Serruys
AIMS: In the minimalist transcatheter aortic valve implantation (TAVI) era, the usage of transesophageal echocardiography becomes restricted. Conversely, aortography gains clinical ground in quantifying prosthetic valve regurgitation (PVR) during the procedure. In a mock circulation system, we sought to compare the contrast volume required and the accuracy of aortographic videodensitometric PVR assessment using a synchronized diastolic and standard (non-synchronized) injection aortography...
July 11, 2017: EuroIntervention
https://www.readbyqxmd.com/read/28691910/transcatheter-aortic-valve-implantation-for-mixed-versus-pure-stenotic-aortic-valve-disease
#15
Mohammad Abdelghani, Rafael Cavalcante, Yosuke Miyazaki, Robbert J de Winter, Jan G Tijssen, Rogério Sarmento-Leite, José A Mangione, Alexandre Abizaid, Pedro A Lemos, Patrick W Serruys, Fabio S de Brito
AIMS: In addition to patients with pure/predominant aortic stenosis (PAS), real-world transcatheter aortic valve implantation (TAVI) referrals include patients with mixed aortic valve disease (MAVD; severe stenosis + moderate-severe regurgitation). We sought to compare TAVI outcomes in patients with MAVD vs. PAS. METHODS AND RESULTS: Out of 793 consecutive patients undergoing TAVI, 106 (13.4%) had MAVD. Patients with MAVD were younger and had a higher operative risk, a severer adverse cardiac remodeling, and a worse functional status than patients with PAS...
July 11, 2017: EuroIntervention
https://www.readbyqxmd.com/read/28690300/contemporary-in-hospital-and-long-term-outcomes-of-surgical-management-for-fungal-endocarditis
#16
Jinmiao Chen, Jun Li, Tianyu Zhou, Kui Hu, Zhaohua Yang, Yao Wang, Kai Zhu, Tao Hong, Hao Lai, Chunsheng Wang
Fungal endocarditis (FE) is a rare and fatal disease. The contemporary in-hospital and long-term surgical outcomes of FE have not been adequately evaluated. This study describes our experience with the surgical management of FE.Eight FE patients who underwent surgery in our center from January 2004 to November 2016 were included in this study. Seven had fungal prosthetic valve endocarditis (PVE) and one fungal native valve endocarditis (NVE). The Bentall operation, Cabrol operation, and mitral valve replacement were performed in 4, 3, and 1 patient, respectively...
July 10, 2017: International Heart Journal
https://www.readbyqxmd.com/read/28688832/prosthetic-valve-infective-endocarditis-with-mycobacterium-fortuitum-antibiotics-alone-can-be-curative
#17
Sonali R Gnanenthiran, Eunice Y T Liu, Michael Wilson, Tommy Chung, Thomas Gottlieb
Rapidly growing non-tuberculous mycobacteria (RGM) are a rare, often fatal cause of infective endocarditis. Although surgery has been the cornerstone of RGM endocarditis therapy, we present the first documented adult case of Mycobacterium fortuitum endocarditis cured with antibiotic therapy.
June 15, 2017: Heart, Lung & Circulation
https://www.readbyqxmd.com/read/28681819/genome-sequence-of-an-invasive-strain-of-streptococcus-gordonii
#18
Thangam Menon, V Naveen Kumar
We report the genome sequence of IE35, a strain of Streptococcus gordonii isolated from the blood of a patient with prosthetic valve endocarditis. Whole-genome sequencing of S. gordonii IE35 strain by the combination of Illumina HiSeq2000 paired-end, Ion Torrent single-end sequencing and gap closing by Illumina NextSeq yielded a single, circular chromosome of 2,190,105 bp. It had 2106 predicted coding sequences, of which 2014 genes encoded proteins involved in various cellular processes and 66 genes coded for RNA...
April 2017: Indian Journal of Medical Microbiology
https://www.readbyqxmd.com/read/28674625/gender-related-differences-in-self-reported-dental-care-in-adults-with-congenital-heart-disease-at-increased-risk-of-infective-endocarditis
#19
Susann Schmidt, Marlies Ramseier-Hadorn, Corina Thomet, Kerstin Wustmann, Markus Schwerzmann
OBJECTIVE: Adults with congenital heart disease (CHD) are at increased risk of infective endocarditis (IE). Women with CHD have a lower IE risk, potentially due to gender-related differences in dental care. We aimed to assess self-reported dental hygiene measures in adults with CHD, and to identify factors associated with good oral hygiene. METHODS AND RESULTS: Descriptive study includes 187 adults with CHD at increased risk of IE. The patients' IE knowledge was assessed using an adapted version of the Leuven Knowledge Questionnaire for CHD...
2017: Open Heart
https://www.readbyqxmd.com/read/28674619/on-x-versus-st-jude-medical-regent-mechanical-aortic-valve-prostheses-early-haemodynamics
#20
Robert Xu, Mohammad Rahnavardi, Bradley Pitman, Masoumeh Shirazi, Robert Stuklis, James Edwards, Michael Worthington
OBJECTIVE: We aimed to compare the early haemodynamic data of the On-X and St Jude Medical (SJM) Regent bileaflet mechanical prostheses in the aortic position. METHODS: A retrospective study was performed using data collected prospectively for a national database. Thirty-three patients who had aortic On-X valve (On-X group) and 33 matched patients who had aortic SJM Regent valve (SJM group) were included. The intraoperative and early postoperative data were collected...
2017: Open Heart
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