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https://www.readbyqxmd.com/read/29049951/the-mechanics-of-dental-occlusion-and-disclusion
#1
Thomas R Katona, George J Eckert
BACKGROUND: The mechanical environment associated with occluding teeth is the foundation for a wide range of research topics, clinical practice and dogma, product development and marketing, and medico-legal issues. The purpose of this study was to experimentally examine the relationships between occlusal factors and their impact on the associated contact forces. METHODS: Matching pairs of 0°, 20°, 33° and 40° cusp first molar denture teeth were placed into Class I, II and III molar relationships...
October 10, 2017: Clinical Biomechanics
https://www.readbyqxmd.com/read/29049787/sutureless-aortic-valve-replacement-versus-transcatheter-aortic-valve-implantation-a-meta-analysis-of-comparative-matched-studies-using-propensity-score-matching
#2
Massimo Meco, Antonio Miceli, Andrea Montisci, Francesco Donatelli, Silvia Cirri, Matteo Ferrarini, Antonio Lio, Mattia Glauber
OBJECTIVES: The aim of this meta-analysis was to compare outcomes of patients undergoing transcatheter aortic valve implantation (TAVI) with those undergoing surgical aortic valve replacement using sutureless valves. METHODS: A systematic review and meta-analysis in accordance with the Preferred Reporting Items for Systematic Reviews and Meta-Analyses (PRISMA) statement was performed. RESULTS: No randomized controlled trials were identified...
September 11, 2017: Interactive Cardiovascular and Thoracic Surgery
https://www.readbyqxmd.com/read/29049782/rotational-speed-modulation-used-with-continuous-flow-left-ventricular-assist-device-provides-good-pulsatility
#3
Noritsugu Naito, Takashi Nishimura, Kei Iizuka, Yoshiaki Takewa, Akihide Umeki, Masahiko Ando, Minoru Ono, Eisuke Tatsumi
OBJECTIVES: Continuous-flow left ventricular assist devices (CF-LVADs) are widely used to treat patients with end-stage heart failure. Although continuous flow is different from physiological flow, patients show improved outcomes after CF-LVAD implantation. A novel rotational speed (RS) modulation system used with CF-LVAD (EVAHEART) has been developed, which can change RS in synchronization with the native cardiac cycle. We conducted the present study to investigate the influence of the system on pulsatility in peripheral perfusion...
August 10, 2017: Interactive Cardiovascular and Thoracic Surgery
https://www.readbyqxmd.com/read/29049673/incidence-and-echocardiographic-predictors-of-early-postoperative-right-ventricular-dysfunction-following-left-ventricular-assist-implantation-in-paediatric-patients
#4
Mathias Redlin, Oliver Miera, Helmut Habazettl, Joachim Photiadis, María Irene Carísimo-Cresta, Mathias Hommel, Benjamin O'Brien, Marian Kukucka
OBJECTIVES: Left ventricular assist device implantation is an established therapy for paediatric patients with end-stage heart failure. Early right ventricular dysfunction (RVD) after implantation still remains a challenge in the postoperative period. This study sought to determine the incidence of RVD and to identify echocardiographic predictors of RVD in paediatric patients, as well describing associated clinical outcome. METHODS: Prospectively collected preoperative echocardiographic, haemodynamic, demographic and biochemical data from 48 patients scheduled for left ventricular assist device implantation were evaluated...
July 31, 2017: Interactive Cardiovascular and Thoracic Surgery
https://www.readbyqxmd.com/read/29049636/implantable-epicardial-cardioverter-defibrillator-induced-localized-constrictive-pericarditis
#5
Tomohiro Mizuno, Masahiko Goya, Kenzo Hirao, Hirokuni Arai
In the 1990s, epicardial implantable cardioverter-defibrillator (ICD) patches were frequently implanted to treat life-threatening ventricular arrhythmia. However, owing to the high rates of functional failure, the patch system has been replaced by transvenous ICD leads system. Although morphological abnormalities such as dense fibrosis around the patch are quite frequent, epicardial ICD patch-induced localized constrictive pericarditis is very rare. We encountered a patient who had severe heart failure due to constrictive pericarditis, 23 years after the implantation of epicardial ICD patches...
August 7, 2017: Interactive Cardiovascular and Thoracic Surgery
https://www.readbyqxmd.com/read/29049539/mid-and-long-term-outcome-comparisons-of-everolimus-eluting-bioresorbable-scaffolds-versus-everolimus-eluting-metallic-stents-a-systematic-review-and-meta-analysis
#6
Xin-Lin Zhang, Qing-Qing Zhu, Li-Na Kang, Xue-Ling Li, Biao Xu
Background: Percutaneous coronary interventions to implant bioresorbable vascular scaffolds (BVSs) were designed to reduce the late thrombotic events that occur with metallic stents. Purpose: To estimate the incidence of scaffold thrombosis after BVS implantation and compare everolimus-eluting BVSs with everolimus-eluting metallic stents (EESs) in terms of safety and efficacy at mid- and long-term follow-up in adults who had a percutaneous coronary intervention...
October 17, 2017: Annals of Internal Medicine
https://www.readbyqxmd.com/read/29049508/outcomes-in-women-and-minorities-compared-with-white-men-1-year-after-everolimus-eluting-stent-implantation-insights-and-results-from-the-platinum-diversity-and-promus-element-plus-post-approval-study-pooled-analysis
#7
Wayne Batchelor, David E Kandzari, Scott Davis, Luis Tami, John C Wang, Islam Othman, Osvaldo S Gigliotti, Amir Haghighat, Sarabjeet Singh, Mario Lopez, Gregory Giugliano, Phillip A Horwitz, Jaya Chandrasekhar, Paul Underwood, Craig A Thompson, Roxana Mehran
Importance: There exist limited outcomes data for women and minorities after contemporary percutaneous coronary intervention (PCI). Objective: To examine 1-year outcomes in women and minorities vs white men after PCI with everolimus-eluting stents. Design, Settings, and Participants: The PLATINUM Diversity study was a single-arm study enrolling women and minorities. Patient-level pooling with the PROMUS Element Plus Post-Approval Study was prespecified...
October 18, 2017: JAMA Cardiology
https://www.readbyqxmd.com/read/29049294/impact-of-dynamic-changes-of-elevated-bilirubin-on-survival-in-patients-on-veno-arterial-extracorporeal-life-support-for-acute-circulatory-failure
#8
Miriam Freundt, Dirk Lunz, Alois Philipp, Bernd Panholzer, Matthias Lubnow, Christine Friedrich, Leopold Rupprecht, Stephan Hirt, Assad Haneya
AIMS: Veno-arterial extracorporeal life support (ECLS) is an established method to stabilize acute circulatory failure. Parameters and data on when to ideally wean circulatory support are limited. Bilirubin is a marker of end-organ damage. Therefore, the purpose of this large study was to evaluate the impact of dynamic changes of elevated bilirubin levels on survival in patients on ECLS. METHODS AND RESULTS: We reviewed 502 consecutive cases of ECLS from 2007 to 2015...
2017: PloS One
https://www.readbyqxmd.com/read/29049224/primary-stability-in-total-hip-replacement-a-biomechanical-investigation
#9
Paul Schmitz, Boyko Gueorguiev, Ivan Zderic, Christian Pfeifer, Michael Nerlich, Stephan Grechenig
BACKGROUND: In total hip replacement (THR), it is essential to achieve a primary stability to guarantee good long-term results. A novel locking screw hip (LSH)-stem, anchored to the medial cortex of the proximal femur by 5 monocortical locking screws, was developed to overcome the shortcomings of uncemented press-fit and cemented straight stems while simultaneously achieving primary stability. The aim of this study was to investigate the biomechanical competence of the LSH-stem in comparison to an uncemented press-fit stem...
October 2017: Medicine (Baltimore)
https://www.readbyqxmd.com/read/29049196/three-dimensional-reduction-and-finite-element-analysis-improves-the-treatment-of-pelvic-malunion-reconstructive-surgery-a-case-report
#10
Sascha Kurz, Philipp Pieroh, Maximilian Lenk, Christoph Josten, Jörg Böhme
RATIONALE: Pelvic malunion is a rare complication and is technically challenging to correct owing to the complex three-dimensional (3D) geometry of the pelvic girdle. Hence, precise preoperative planning is required to ensure appropriate correction. Reconstructive surgery is generally a 2- or 3-stage procedure, with transiliac osteotomy serving as an alternative to address limb length discrepancy. PATIENT CONCERNS: A 38-year-old female patient with a Mears type IV pelvic malunion with previous failed reconstructive surgery was admitted to our department due to progressive immobilization, increasing pain especially at the posterior pelvic arch and a leg length discrepancy...
October 2017: Medicine (Baltimore)
https://www.readbyqxmd.com/read/29048692/effects-of-electrical-stimulation-in-the-treatment-of-osteonecrosis-of-the-femoral-head
#11
Salvador Fornell, Juan Ribera, Mario Mella, Andrés Carranza, David Serrano-Toledano, Gabriel Domecq
INTRODUCTION: The aim of this study was to examine whether the use of an internal electrostimulator could improve the results obtained with core decompression alone in the treatment of osteonecrosis of the femoral head. METHODS: We performed a retrospective study of 41 patients (55 hips) treated for osteonecrosis of the femoral head between 2005 and 2014. Mean follow-up time was 56 (12-108) months. We recorded 3 parameters: time to recurrence of pain, time to conversion to arthroplasty and time to radiographic failure...
October 16, 2017: Hip International: the Journal of Clinical and Experimental Research on Hip Pathology and Therapy
https://www.readbyqxmd.com/read/29047378/comparison-of-strain-parameters-in-dyssynchronous-heart-failure-between-speckle-tracking-echocardiography-vendor-systems
#12
Wouter M van Everdingen, Alexander H Maass, Kevin Vernooy, Mathias Meine, Cornelis P Allaart, Frederik J De Lange, Arco J Teske, Bastiaan Geelhoed, Michiel Rienstra, Isabelle C Van Gelder, Marc A Vos, Maarten J Cramer
BACKGROUND: Although mechanical dyssynchrony parameters derived by speckle tracking echocardiography (STE) may predict response to cardiac resynchronization therapy (CRT), comparability of parameters derived with different STE vendors is unknown. METHODS: In the MARC study, echocardiographic images of heart failure patients obtained before CRT implantation were prospectively analysed with vendor specific STE software (GE EchoPac and Philips QLAB) and vendor-independent software (TomTec 2DCPA)...
October 18, 2017: Cardiovascular Ultrasound
https://www.readbyqxmd.com/read/29047335/candidate-lethal-haplotypes-and-causal-mutations-in-angus-cattle
#13
Jesse L Hoff, Jared E Decker, Robert D Schnabel, Jeremy F Taylor
BACKGROUND: If unmanaged, high rates of inbreeding in livestock populations adversely impact their reproductive fitness. In beef cattle, historical selection strategies have increased the frequency of several segregating fatal autosomal recessive polymorphisms. Selective breeding has also decreased the extent of haplotypic diversity genome-wide. By identifying haplotypes for which homozygotes are not observed but would be expected based on their frequency, candidates for developmentally lethal recessive loci can be localized...
October 18, 2017: BMC Genomics
https://www.readbyqxmd.com/read/29047206/determining-the-cross-talk-between-smooth-muscle-cells-and-macrophages-on-a-cobalt-chromium-stent-material-surface-using-an-in-vitro-post-implantation-co-culture-model
#14
Jordan A Anderson, Sujan Lamichhane, Thomas Vierhout, Daniel Engebretson
Smooth muscle cells (SMCs) and macrophages are important cellular components involved in the development of complications following the implantation of cardiovascular devices. This leads to various disorders such as restenosis, chronic inflammation, and may ultimately result in device failure. In this study, we developed a post-implant stent co-culture model using different ratios of SMCs and macrophages seeded on to cobalt-chromium alloy. The macrophages had an increased affinity to the co-culture surfaces, which resulted in decreased SMC attachment to the alloy surfaces at the initial time point...
October 19, 2017: Journal of Biomedical Materials Research. Part A
https://www.readbyqxmd.com/read/29047028/de-novo-implantation-vs-upgrade-cardiac-resynchronization-therapy-a-systematic-review-and-meta-analysis
#15
REVIEW
Annamaria Kosztin, Mate Vamos, Daniel Aradi, Walter Richard Schwertner, Attila Kovacs, Klaudia Vivien Nagy, Endre Zima, Laszlo Geller, Gabor Zoltan Duray, Valentina Kutyifa, Bela Merkely
Patients with conventional pacemakers or implanted defibrillators are often considered for cardiac resynchronization therapy (CRT). Our aim was to summarize the available evidences regarding the clinical benefits of upgrade procedures. A systematic literature search was performed from studies published between 2006 and 2017 in order to compare the outcome of CRT upgrade vs. de novo implantations. Outcome data on all-cause mortality, heart failure events, New York Heart Association (NYHA) Class, QRS narrowing and echocardiographic parameters were analysed...
October 19, 2017: Heart Failure Reviews
https://www.readbyqxmd.com/read/29046622/essure%C3%A2-present-controversies-and-5%C3%A2-years-learned-lessons-a-retrospective-study-with-short-and-long-term-follow-up
#16
Sara Câmara, Filipa de Castro Coelho, Cláudia Freitas, Lilia Remesso
BACKGROUND: The risk-benefit of contraception with Essure® is being readdressed due to an increase of reports of adverse effects with this device. Our aim was to proceed to an internal quality evaluation and to identify opportunities for protocol improvement. We proceeded to a one-center, retrospective consecutive case series of women admitted for Essure® placement, from 1 January 2012 until 31 December 2016 (5 years). RESULTS: In a total of 274 women, technical difficulties were mainly unilateral, with no acute or short-term severe complications...
2017: Gynecological Surgery
https://www.readbyqxmd.com/read/29045747/extracorporeal-membrane-oxygenation-support-for-right-ventricular-failure-after-left-ventricular-assist-device-implantation
#17
Julia Riebandt, Thomas Haberl, Dominik Wiedemann, R Moayedifar, Thomas Schloeglhofer, Stéphane Mahr, Kamen Dimitrov, Philipp Angleitner, Guenther Laufer, Daniel Zimpfer
OBJECTIVES: Right ventricular (RV) failure complicating left ventricular assist device implantation is associated with increased mortality. Despite a lack of supporting evidence, venoarterial extracorporeal membrane oxygenation (ECMO) support is increasingly being used as an alternative to traditional temporary RV support. We report our institutional experience with ECMO-facilitated RV support after left ventricular assist device implantation. METHODS: We retrospectively reviewed the concept of temporary ECMO support for perioperative RV failure in 32 consecutive left ventricular assist device (mean age 52 ± 14 years; male 84...
October 16, 2017: European Journal of Cardio-thoracic Surgery
https://www.readbyqxmd.com/read/29045598/prognostic-value-of-pulmonary-blood-volume-by-first-pass-contrast-enhanced-cmr-in-heart-failure-outpatients-the-prove-hf-study
#18
F Ricci, A Barison, G Todiere, C Mantini, A R Cotroneo, M Emdin, R De Caterina, S Galllina, G D Aquaro
Aims: Pulmonary blood volume (PBV) is a novel clinical application of cardiovascular magnetic resonance (CMR) imaging for the quantitative grading of haemodynamic congestion. In this study, we aimed to assess the prognostic value of PBV in a cohort of outpatients with chronic heart failure (HF). Methods and results: One hundred and twelve consecutive patients (91 men, 67 ± 12 years) and 53 age- and sex-matched healthy controls underwent echocardiography and contrast-enhanced CMR...
October 17, 2017: European Heart Journal Cardiovascular Imaging
https://www.readbyqxmd.com/read/29045311/cardiac-resynchronization-therapy-outcomes-in-patients-with-chronic-heart-failure-cardiac-resynchronization-therapy-with-pacemaker-versus-cardiac-resynchronization-therapy-with-defibrillator
#19
Michael Drozd, John Gierula, Judith E Lowry, Maria F Paton, Eleanor Joy, Haqeel A Jamil, Richard M Cubbon, Mark T Kearney, David A Cairns, Klaus K Witte
AIMS: Cardiac resynchronization therapy (CRT) for chronic heart failure with left ventricular systolic dysfunction (LVSD) consistently improves survival against optimal medical therapy alone. Limited data exist comparing the outcomes between CRT with pacemaker (CRT-P) and with defibrillator (CRT-D). We aimed to investigate the long-term prognosis of patients who received CRT-P or CRT-D. METHODS AND RESULTS: Data were prospectively collected from consecutive patients with standard indications for CRT, who were implanted at a single large tertiary centre between 2008 and 2012...
October 16, 2017: Journal of Cardiovascular Medicine
https://www.readbyqxmd.com/read/29043704/accuracy-of-two-dimensional-transvaginal-sonography-and-office-hysteroscopy-for-detection-of-uterine-abnormalities-in-patients-with-repeated-implantation-failures-or-recurrent-pregnancy-loss
#20
Marzieh Shiva, Firouzeh Ahmadi, Arezoo Arabipoor, Mansoureh Oromiehchi, Mohammad Chehrazi
Background: We sought to compare diagnostic values of two-dimensional transvaginal sonography (2D TVS) and office hysteroscopy (OH) for evaluation of endometrial pathologies in cases with repeated implantation failure (RIF) or recurrent pregnancy loss (RPL). MATERIALS AND METHODS: This prospective study was performed at Royan Institute from December 2013 to January 2015. TVS was performed before hysteroscopy as part of the routine diagnostic work-up in 789 patients with RIF or RPL...
January 2018: International Journal of Fertility & Sterility
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