keyword
MENU ▼
Read by QxMD icon Read
search

heart valves

keyword
https://www.readbyqxmd.com/read/27936430/collagen-tissue-treated-with-chitosan-solution-in-h2o-co2-mixtures-influence-of-clathrates-hydrates-on-the-structure-and-mechanical-properties
#1
Ivan S Chaschin, Natalia P Bakuleva, Timofei E Grigoriev, Sergey V Krasheninnikov, Lev N Nikitin
A mixture of water/carbon dioxide is a "green" perspective solvent from the viewpoint of biomedical applications. Clathrate hydrates are formed this solvent under certain conditions and a very interesting question is the impact of clathrates hydrates on the structure and properties of bovine pericardium, which is used in biomedicine, in particular as a main part of biological heart valve prostheses. The aim of the present work is to investigate the influence of clathrates on the structure and mechanical properties of the collagen tissue treated with chitosan in H2O/CO2 mixtures under pressure 3...
November 30, 2016: Journal of the Mechanical Behavior of Biomedical Materials
https://www.readbyqxmd.com/read/27935958/synchronization-and-random-triggering-of-lymphatic-vessel-contractions
#2
James W Baish, Christian Kunert, Timothy P Padera, Lance L Munn
The lymphatic system is responsible for transporting interstitial fluid back to the bloodstream, but unlike the cardiovascular system, lacks a centralized pump-the heart-to drive flow. Instead, each collecting lymphatic vessel can individually contract and dilate producing unidirectional flow enforced by intraluminal check valves. Due to the large number and spatial distribution of such pumps, high-level coordination would be unwieldy. This leads to the question of how each segment of lymphatic vessel responds to local signals that can contribute to the coordination of pumping on a network basis...
December 2016: PLoS Computational Biology
https://www.readbyqxmd.com/read/27934625/ultrasonographic-findings-in-two-sheep-with-enzootic-calcinosis
#3
U Braun, K Mitchell, S Schramm, S Nogler, J Hatt, A Malbon
This report describes 2 sheep with enzootic calcinosis characterized by abnormal cardiovascular and respiratory findings and ascites causing abdominal distension. Both sheep were anorexic and listless and had increased heart and respiratory rates. Auscultation of the heart revealed a gallop rhythm in sheep 1 and a loud systolic heart murmur in sheep 2. The activities of liver enzymes were severely increased in both sheep. Abdominal ultrasonography showed severe ascites and congestion of the liver and caudal vena cava...
December 2016: Schweizer Archiv Für Tierheilkunde
https://www.readbyqxmd.com/read/27934611/a-multicentre-european-registry-to-evaluate-the-direct-flow-medical-transcatheter-aortic-valve-system-for-the-treatment-of-patients-with-severe-aortic-stenosis
#4
Christoph K Naber, Stylianos A Pyxaras, Hüseyin Ince, Peter Frambach, Antonio Colombo, Christian Butter, Fernando Gatto, Ulrich Hink, Georg Nickenig, Giuseppe Bruschi, Guus Brueren, Didier Tchétché, Peter Den Heijer, Wolfgang Schillinger, Smita Scholtz, Jan Van der Heyden, Thierry Lefèvre, Martine Gilard, Karl-Heinz Kuck, Joachim Schofer, Dimitar Divchev, Helmut Baumgartner, Federico Asch, Daniel Wagner, Azeem Latib, Federico De Marco, Stephan Kische
AIMS: Our aim was to assess the clinical outcomes of the Direct Flow Medical Transcatheter Aortic Valve System (DFM-TAVS), when used in routine clinical practice. METHODS AND RESULTS: This is a prospective, open-label, multicentre, post-market registry of patients treated with DFM-TAVS according to approved commercial indications. Echocardiographic and angiographic data were evaluated by an independent core laboratory and adverse events were adjudicated and classified according to VARC-2 criteria by an independent clinical events committee...
December 10, 2016: EuroIntervention
https://www.readbyqxmd.com/read/27933588/mitraclip-step-by-step-how-to-simplify-the-procedure
#5
REVIEW
M A Sherif, L Paranskaya, S Yuecel, S Kische, O Thiele, G D'Ancona, A Neuhausen-Abramkina, J Ortak, H Ince, A Öner
The MitraClip system is a device for percutaneous edge-to-edge reconstruction of the mitral valve in patients with severe mitral regurgitation who are deemed at high risk for surgery. Studies have underlined the therapeutic benefit of the MitraClip system for patients at extreme and high risk for mitral valve surgery, suffering from either degenerative or functional mitral regurgitation. The MitraClip procedure shows low peri-procedural complication rates, and a significant reduction in mitral regurgitation, as well as an improvement in functional capacity and most importantly quality of life...
December 8, 2016: Netherlands Heart Journal
https://www.readbyqxmd.com/read/27933393/prevalence-and-prognostic-impact-of-left-sided-valve-thickening-in-systemic-light-chain-amyloidosis
#6
Dania Mohty, Sarah Pradel, Julien Magne, Bahaa Fadel, Cyrille Boulogne, Vincent Petitalot, Safaa Raboukhi, Nicole Darodes, Thibaud Damy, Victor Aboyans, Arnaud Jaccard
BACKGROUND: Left heart valve thickening (LVT) was described in patients with light-chain amyloidosis (AL). This phenomenon reflects likely infiltration of the valve by amyloid proteins. However, the prevalence of LVT and its prognostic value have not been investigated in patients with AL. METHODS AND RESULTS: Comprehensive transthoracic echocardiography was performed at baseline in 150 patients [median age 68 (33-87) years; 59% male] with confirmed AL. The presence of abnormal mitral and/or aortic valve thickening (>3 mm) was assessed in all included patients...
December 8, 2016: Clinical Research in Cardiology: Official Journal of the German Cardiac Society
https://www.readbyqxmd.com/read/27933106/screening-detected-rheumatic-heart-disease-can-progress-to-severe-disease
#7
Daniel Engelman, Gavin R Wheaton, Reapi L Mataika, Joseph H Kado, Samantha M Colquhoun, Bo Remenyi, Andrew C Steer
OBJECTIVES: Echocardiography is a sensitive test for rheumatic heart disease (RHD) screening; however the natural history of RHD detected on screening has not been established. We aimed to evaluate the progression of screening-detected RHD in Fiji. METHODS: All young people previously diagnosed with RHD through screening, with echocardiograms available for review, were eligible. All baseline echocardiograms were reported again. Participants underwent follow-up echocardiography...
2016: Heart Asia
https://www.readbyqxmd.com/read/27932181/use-of-terlipressin-in-an-elderly-patient-with-moderate-aortic-valve-stenosis-accompanied-by-episodic-atrial-fibrillation-during-liver-transplantation-a-case-report
#8
Y J Won, B G Lim, D Chung, E Park, H Kim, I O Lee, M H Kong
Anesthesia for patients with moderate aortic stenosis accompanied by atrial fibrillation during high-risk surgery such as liver transplantation remains a challenge in maintaining control of heart rate and maintenance of cardiac output. The action of terlipressin on vasopressin receptors (mainly V1 receptors) leads to splanchnic vasoconstriction and is the key mechanism responsible for increasing systemic vascular resistance and reducing heart rate. We report successful anesthetic management using low-dose terlipressin infusion in an elderly patient who had moderate aortic stenosis with atrial fibrillation during urgent deceased-donor liver transplantation...
November 2016: Transplantation Proceedings
https://www.readbyqxmd.com/read/27931592/the-rationale-for-performance-of-coronary%C3%A2-angiography-and-stenting-before-transcatheter-aortic-valve-replacement-from-the-interventional-section-leadership-council-of-the-american-college-of-cardiology
#9
REVIEW
Stephen Ramee, Saif Anwaruddin, Gautam Kumar, Robert N Piana, Vasilis Babaliaros, Tanveer Rab, Lloyd W Klein
Transcatheter aortic valve replacement (TAVR) is an effective, nonsurgical treatment option for patients with severe aortic stenosis. The optimal treatment strategy for treating concomitant coronary artery disease (CAD) has not been tested prospectively in a randomized clinical trial. Nevertheless, it is standard practice in the United States to perform coronary angiography and percutaneous coronary intervention for significant CAD at least 1 month before TAVR. All existing clinical trials were designed using this strategy...
December 12, 2016: JACC. Cardiovascular Interventions
https://www.readbyqxmd.com/read/27931548/percutaneous-transvenous-mitral-commissurotomy-in-mitral-stenosis-and-left-atrial-appendage-clot-patients-in-special-conditions-hospital-based-study
#10
Rajib Rajbhandari, Rabi Malla, Arun Maskey, Yadav Bhatta, Yubraj Limbu, Ranjit Sharma, Satish Singh, Chandramani Adhikari, Sundeep Mishra
BACKGROUND: The percutaneous transvenous mitral commissurotomy is an important procedure for the treatment of mitral stenosis. A lot of mitral stenosis cases have left atrial appendage clot which precludes the patient from the benefit of this procedure. The aim of the study was to study the feasibility and safety of the procedure in a patient with appendage clot in the setup of certain urgent conditions. METHOD: All cases of mitral stenosis with significant dyspnea and mitral valve area <1...
November 2016: Indian Heart Journal
https://www.readbyqxmd.com/read/27931546/maternal-and-fetal-outcomes-in-pregnant-women-undergoing-balloon-mitral-valvotomy-for-rheumatic-mitral-stenosis
#11
Desabandhu Vinayakumar, G V Vinod, Suresh Madhavan, Mangalath Narayanan Krishnan
BACKGROUND: Rheumatic mitral stenosis constitutes a major cause of acquired heart disease complicating pregnancy in India. In the present study, we have studied the fetal and maternal outcomes of women undergoing balloon mitral valvotomy during pregnancy. METHODS AND RESULTS: 49 pregnant ladies were included in this study in whom balloon mitral valvotomy was performed. The mean age of these patients was 25.7±3.1 years. The mean gestational age was 23.5±5.2 weeks (12-36 weeks)...
November 2016: Indian Heart Journal
https://www.readbyqxmd.com/read/27930604/an-automated-expanded-polytetrafluoroethylene-suturing-and-coaxial-fastener-system-for-mitral-chordae-replacement-strength-feasibility-and-healing
#12
Candice Y Lee, Joshua K Wong, Jude S Sauer, Heather R Gorea, Angelo J Martellaro, Andrew R Sifain, Peter A Knight
OBJECTIVE: Mitral valve (MV) chordae replacements can be technically challenging. Technology that remotely delivers and accurately secures artificial chordae may reduce the learning curve and improve the reliability of MV repairs. METHODS: The technology involved two devices: a remote suturing device for delivery of expanded polytetrafluoroethylene (ePTFE) suture to the papillary muscle and a Coaxial titanium suture fastener (TF) device with integrated saline infusion for real-time determination of chordae length during fixation...
December 7, 2016: Innovations: Technology and Techniques in Cardiothoracic and Vascular Surgery
https://www.readbyqxmd.com/read/27930602/an-early-canadian-experience-with-the-correx-automated-coring-and-apical-connector-device-for-aortic-valve-bypass
#13
Hussein A Al-Amodi, Christopher L Tarola, Hamad F Alhabib, Corey Adams, Linrui Ray Guo, Bob B Kiaii
OBJECTIVE: Aortic valve replacement is the standard of care for severe, symptomatic aortic valve stenosis (AS); however, anatomy or pre-existing comorbidities may preclude conventional or alternative transcatheter approaches. Aortic valve bypass (AVB) may be performed as a salvage procedure for the relief of symptomatic aortic stenosis in patients who are not suitable candidates for aortic valve replacement. METHODS: At our institution, seven patients underwent AVB using the Correx automated coring and apical connector system...
December 7, 2016: Innovations: Technology and Techniques in Cardiothoracic and Vascular Surgery
https://www.readbyqxmd.com/read/27928594/pulmonary-hypertension-in-rheumatic-mitral-stenosis-revisited
#14
L Pourafkari, S Ghaffari, M Ahmadi, A Tajlil, N Aslanabadi, N D Nader
BACKGROUND: In patients with mitral stenosis (MS), pulmonary hypertension (PH) is a significant contributor to the associated morbidity. We aimed to study factors associated with the presence of significant PH (sPH) and whether incorporating body surface area (BSA) in the mitral valve area (MVA) would improve the predictive value of the latter. METHODS: The medical records of 558 patients with severe MS undergoing percutaneous balloon mitral commissurotomy were evaluated over a period of 8 years...
December 7, 2016: Herz
https://www.readbyqxmd.com/read/27928260/emergency-redo-mitral-valve-replacement-immediately-after-caesarean-section
#15
İbrahim Duvan, Ümit Pınar Sungur, Burak Emre Onuk, Mehmet Şanser Ateş, İbrahim Sami Karacan, Murat Kurtoğlu
Surgery for heart diseases during pregnancy, especially necessitating cardiopulmonary bypass, is believed to trigger maternal and fetal risks and should be performed only when medical therapy has been unsuccessful to alleviate the cardiac decompensation. A 33-year-old pregnant woman in her 33rd week of gestation was admitted to our hospital. She had rheumatic mitral valvular stenosis and had undergone mitral valve replacement (MVR) with a mechanical prosthesis 11 years earlier in another center. Echocardiography revealed a thrombotic mass obstructing the leaflets of the mechanical mitral valve...
April 13, 2016: Journal of Tehran Heart Center
https://www.readbyqxmd.com/read/27926626/frailty-assessed-by-the-forecast-is-a-valid-tool-to-predict-short-term-outcome-after-transcatheter-aortic-valve-replacement
#16
Adrian R Kobe, Alexander Meyer, Hassan Elmubarak, Jörg Kempfert, Jovana Pavicevic, Francesco Maisano, Thomas Walther, Volkmar Falk, Simon H Sündermann
OBJECTIVE: The term frailty is frequently used during decision-making in transcatheter heart valve procedures. Nevertheless, frailty is still measured by eyeballing rather than by using standardized frailty assessments. In a previous study, we developed a frailty score in a cardiac surgical patient population including patients, who underwent transcatheter aortic valve replacement (TAVR). Here, we present the results from the subsequent validation study focusing on the TAVR cohort. METHODS: One hundred thirty patients underwent TAVR...
December 6, 2016: Innovations: Technology and Techniques in Cardiothoracic and Vascular Surgery
https://www.readbyqxmd.com/read/27926465/freestyle-stentless-bioprosthesis-for-aortic-valve-therapy-17-year-clinical-results
#17
Juergen Ennker, Markus Meilwes, Joern Pons-Kuehnemann, Bernd Niemann, Philippe Grieshaber, Ina C Ennker, Andreas Boening
BACKGROUND: Aortic valve replacement with stentless bioprostheses has been shown to produce lower aortic gradients than stented bioprostheses, thus facilitating left ventricular mass regression and preventing heart failure. We sought to determine the long-term results of stentless biological aortic valve replacement over a 17-year follow-up. METHODS: Between 1996 and 2012, 2551 patients underwent isolated aortic valve replacement with a stentless prosthesis (Medtronic Freestyle) at a single center...
November 2016: Asian Cardiovascular & Thoracic Annals
https://www.readbyqxmd.com/read/27925367/transient-severe-tricuspid-regurgitation-after-transplantation-of-an-extremely-oversized-donor-heart-in-a-child-does-size-matter-a-case-report
#18
J Birnbaum, S M Ulrich, R Schramm, C Hagl, A Lehner, M Fischer, N A Haas, B Heineking
In pediatric heart transplantation, the size of the donor organ is an important criterion for organ allocation. Oversized donor hearts are often accepted with good results, but some complications in relation to a high donor-recipient ratio have been described. Our patient was transplanted for progressive heart failure in dilated cardiomyopathy. The donor-to-recipient weight ratio was 3 (donor weight 65 kg, recipient weight 22 kg). The intra-operative echocardiography before chest closure showed excellent cardiac function, no tricuspid valve regurgitation, and a normal central venous pressure...
December 7, 2016: Pediatric Transplantation
https://www.readbyqxmd.com/read/27925233/quantification-and-analysis-of-leaflet-flutter-on-biological-prosthetic-cardiac-valves
#19
Artur H de F Avelar, Jean A Canestri, Camila Bim, Maíra G M Silva, Rudolf Huebner, Marcos Pinotti
The use of porcine or bovine pericardium biological cardiac valves has as its main disadvantage a relatively short lifespan, with failures due to calcification and fatigue. Increasing these valves' durability constitutes a great challenge. An understudied phenomenon is the effect of flutter, an oscillation of the leaflets that can cause regurgitation and accelerate calcification and fatigue. As a starting point to study how to reduce or prevent these oscillations, a method was developed to quantify the flutter frequencies occurring at the point of the valve's full opening...
December 7, 2016: Artificial Organs
https://www.readbyqxmd.com/read/27920984/staphylococcus-lugdunensis-endocarditis-with-destruction-of-the-ventricular-septum-and-multiple-native-valves
#20
Celestine Ishiekwene, Monica Ghitan, Margaret Kuhn-Basti, Edward Chapnick, Yu Shia Lin
Staphylococcus lugdunensis (S. lugdunensis) is a coagulase negative staphylococcus (CoNS) that can cause destructive infective endocarditis. S. lugdunensis, unlike other CoNS, should be considered to be a pathogen. We report the first case of S. lugdunensis endocarditis causing ventricular septal defect and destruction of the aortic and mitral valves. A 53-year-old male with morbid obesity and COPD presented with intermittent fever and progressive shortness of breath for 2 weeks. Chest examination showed bilateral basal crepitations, and a grade 2 systolic murmur along the right sternal border...
2017: IDCases
keyword
keyword
53628
1
2
Fetch more papers »
Fetching more papers... Fetching...
Read by QxMD. Sign in or create an account to discover new knowledge that matter to you.
Remove bar
Read by QxMD icon Read
×

Search Tips

Use Boolean operators: AND/OR

diabetic AND foot
diabetes OR diabetic

Exclude a word using the 'minus' sign

Virchow -triad

Use Parentheses

water AND (cup OR glass)

Add an asterisk (*) at end of a word to include word stems

Neuro* will search for Neurology, Neuroscientist, Neurological, and so on

Use quotes to search for an exact phrase

"primary prevention of cancer"
(heart or cardiac or cardio*) AND arrest -"American Heart Association"