keyword
MENU ▼
Read by QxMD icon Read
search

Bioprosthetics

keyword
https://www.readbyqxmd.com/read/28544841/transcatheter-valve-in-valve-implantation-failing-tricuspid-bioprosthesis-in-a-patient-with-ebstein%C3%A2-s-anomaly
#1
Pedro A Villablanca, Aman M Shah, David F Briceno, Ali N Zaidi, Mei Chau, Mario J Garcia, David Slovut, Cynthia Taub
Transcatheter valve-in-valve (VIV) implantation has been recently proposed as an alternative to surgical reoperative aortic valve replacement in patients with a failing aortic bioprosthesis. Experience with transcatheter VIV implantation at other valve positions is very limited. Herein is reported the case of an 18-year-old man with Ebstein's anomaly and severe tricuspid valve (TV) regurgitation status after bioprosthetic valve replacement, who developed new dyspnea on exertion three years after the initial valve replacement...
January 2017: Journal of Heart Valve Disease
https://www.readbyqxmd.com/read/28544835/leaflet-mechanical-properties-of-carpentier-edwards-perimount-magna-pericardial-aortic-bioprostheses
#2
Heide Kuang, Yue Xuan, Michelle Lu, Aart Mookhoek, Andrew D Wisneski, Julius M Guccione, Liang Ge, Elaine E Tseng
BACKGROUND: Transcatheter aortic valve replacement (TAVR) has recently been shown to be equivalent to surgical aortic valve replacement (SAVR) in intermediate-risk patients. As TAVR expands towards the traditionally SAVR population, TAVR versus SAVR durability becomes increasingly important. While the durability of TAVR is unknown, valve design - particularly with regards to leaflet stress - impacts on valve durability. Although leaflet stress cannot be measured directly, it can be determined using finite element modeling, with such models requiring the mechanical properties of the leaflets...
January 2017: Journal of Heart Valve Disease
https://www.readbyqxmd.com/read/28521923/safety-and-efficacy-of-transcatheter-aortic-valve-replacement-in-the-treatment-of-pure-aortic-regurgitation-in-native-valves-and-failing-surgical-bioprostheses-results-from-an-international-registry-study
#3
Fadi J Sawaya, Marcus-André Deutsch, Moritz Seiffert, Sung-Han Yoon, Pablo Codner, Upul Wickramarachchi, Azeem Latib, A Sonia Petronio, Josep Rodés-Cabau, Maurizio Taramasso, Marco Spaziano, Johan Bosmans, Luigi Biasco, Darren Mylotte, Mikko Savontaus, Peter Gheeraert, Jason Chan, Troels H Jørgensen, Horst Sievert, Marco Mocetti, Thierry Lefèvre, Francesco Maisano, Antonio Mangieri, David Hildick-Smith, Ran Kornowski, Raj Makkar, Sabine Bleiziffer, Lars Søndergaard, Ole De Backer
OBJECTIVES: The aim of this study was to evaluate the use of transcatheter heart valves (THV) for the treatment of noncalcific pure native aortic valve regurgitation (NAVR) and failing bioprosthetic surgical heart valves (SHVs) with pure severe aortic regurgitation (AR). BACKGROUND: Limited data are available about the "off-label" use of transcatheter aortic valve replacement (TAVR) to treat pure severe AR. METHODS: The study population consisted of patients with pure severe AR treated by TAVR at 18 different centers...
May 22, 2017: JACC. Cardiovascular Interventions
https://www.readbyqxmd.com/read/28511838/supra-annular-valve-in-valve-implantation-reduces-blood-stasis-on-the-transcatheter-aortic-valve-leaflets
#4
Koohyar Vahidkhah, Ali N Azadani
Leaflet thrombosis following transcatheter aortic valve replacement (TAVR) and Valve-in-Valve (ViV) procedures has been increasingly recognized. This study aimed to investigate the effect of positioning of the transcatheter aortic valve (TAV) in ViV setting on the flow dynamics aspect of post-ViV thrombosis by quantifying the blood stasis in the intra-annular and supra-annular settings. To that end, two idealized computational models, representing ViV intra-annular and supra-annular positioning of a TAV were developed in a patient-specific geometry...
May 5, 2017: Journal of Biomechanics
https://www.readbyqxmd.com/read/28509899/a-bioprosthetic-ovary-created-using-3d-printed-microporous-scaffolds-restores-ovarian-function-in-sterilized-mice
#5
Monica M Laronda, Alexandra L Rutz, Shuo Xiao, Kelly A Whelan, Francesca E Duncan, Eric W Roth, Teresa K Woodruff, Ramille N Shah
Emerging additive manufacturing techniques enable investigation of the effects of pore geometry on cell behavior and function. Here, we 3D print microporous hydrogel scaffolds to test how varying pore geometry, accomplished by manipulating the advancing angle between printed layers, affects the survival of ovarian follicles. 30° and 60° scaffolds provide corners that surround follicles on multiple sides while 90° scaffolds have an open porosity that limits follicle-scaffold interaction. As the amount of scaffold interaction increases, follicle spreading is limited and survival increases...
May 16, 2017: Nature Communications
https://www.readbyqxmd.com/read/28506647/acute-structural-failure-of-the-trifecta-aortic-valve-bioprosthesis
#6
Michael Z L Zhu, Mark A Newman, Pragnesh Joshi, Jurgen Passage
Advancements in bioprosthetic valve technology have greatly enhanced the haemodynamic performance and long-term durability of tissue valves. These features, along with the key advantage of avoiding lifelong anticoagulation, have made bioprosthetic valves increasingly attractive for clinicians and patients alike. The St Jude Trifecta valve is a novel, bovine pericardial bioprosthesis with promising early data for performance and safety. However, no prosthetic valve is perfect and prosthesis failure can occur with even the most reliable and well-designed devices...
April 20, 2017: Heart, Lung & Circulation
https://www.readbyqxmd.com/read/28499651/bioprosthetic-aortic-valve-durability-a-meta-regression-of-published-studies
#7
REVIEW
Mansen Wang, Anthony P Furnary, Hsin-Fang Li, Gary L Grunkemeier
To compare structural valve deterioration (SVD) among bioprosthetic aortic valve types, a PubMed search found 54 papers containing SVD-free curves extending to at least 10 years. The curves were digitized and fit to Weibull distributions, and the mean times to valve failure (MTTF) were calculated. Twelve valve models were collapsed into four valve types: Medtronic (Medtronic, Minneapolis, MN) and Edwards (Edwards Lifesciences, Irvine, CA) porcine; and Sorin (Sorin Group [now LivaNova], London, United Kingdom) and Edwards pericardial...
May 9, 2017: Annals of Thoracic Surgery
https://www.readbyqxmd.com/read/28488003/daily-transient-discontinuation-of-extracorporeal-lvad-to-prevent-thromboembolism-of-mechanical-aortic-valve-prosthesis
#8
Takamichi Inoue, Tadashi Kitamura, Shinzo Torii, Mitsuhiro Hirata, Toshiaki Mishima, Koichi Sughimoto, Hirotoki Ohkubo, Kensuke Kobayashi, Mamika Motokawa, Miyuki Shibata, Takuya Matsushiro, Yuta Tsuchida, Yurie Miyata, Minoru Ono, Kagami Miyaji
Patients with mechanical aortic valves are generally contraindicated for left ventricular assist device (LVAD) insertion because the prosthetic valve often becomes fixed in closed position. A 41-year-old woman with mechanical aortic valve prosthesis experienced sudden chest pain and developed cardiogenic shock. A paracorporeal pulsatile LVAD and a monopivot centrifugal pump as a right VAD (RVAD) were implanted. The mechanical aortic valve was intentionally left in place. Soon after the operation, LVAD support was discontinued daily for few seconds to allow the mechanical aortic valve to open and to avoid thrombus formation...
May 9, 2017: Journal of Artificial Organs: the Official Journal of the Japanese Society for Artificial Organs
https://www.readbyqxmd.com/read/28487869/a-curious-case-of-persistently-relapsing-hyperkalemia-in-an-esrd-patient-on-maintenance-hemodialysis-following-bioprosthetic-aortic-valve-replacement-a-potential-case-for-the-use-of-the-new-agent-patiromer-for-hyperkalemia-management
#9
Macaulay Amechi Chukwukadibia Onuigbo, Nneoma Agbasi, Fidelis Oguejiofor, Charles Odenigbo
Hyperkalemia is not uncommon in patients with end-stage renal disease (ESRD) on maintenance hemodialysis, often related to dietary indiscretion, following the prolonged inter-dialytic weekend interval in patients on thrice weekly hemodialysis treatments, and sometimes the adverse effects of medications such as RAAS blocking agents. Moreover, hyperkalemia following extended cardiac surgery can result from the use of high-potassium containing cardioplegic solutions used during cardiopulmonary bypass. Nevertheless, different from the foregoing, in the nephrology literature, there have been very rare reports of potentially life-threatening hyperkalemia following cardiac valve replacement procedure...
2017: Journal of Renal Injury Prevention
https://www.readbyqxmd.com/read/28483776/calcification-and-oxidative-modifications-are-associated-with-progressive-bioprosthetic-heart-valve-dysfunction
#10
Suengwon Lee, Robert J Levy, Abigail J Christian, Stanley L Hazen, Nathan E Frick, Eric K Lai, Juan B Grau, Joseph E Bavaria, Giovanni Ferrari
BACKGROUND: Bioprosthetic heart valves (BHVs), fabricated from glutaraldehyde-pretreated bovine pericardium or porcine aortic valves, are widely used for the surgical or interventional treatment of heart valve disease. Reoperation becomes increasingly necessary over time because of BHV dysfunction. METHODS AND RESULTS: Forty-seven explanted BHV aortic valve replacements were retrieved at reoperation for clinically severe BHV dysfunction over the period 2010-2016...
May 8, 2017: Journal of the American Heart Association
https://www.readbyqxmd.com/read/28473362/helcococcus-kunzii-prosthetic-valve-endocarditis-secondary-to-lower-extremity-cellulitis
#11
Saira Farid, William Miranda, Joseph Maleszewski, Muhammad Rizwan Sohail
An 88-year-old man with history of bioprosthetic aortic valve replacement was hospitalised with fever, chills, malaise and right lower extremity cellulitis. Laboratory investigations revealed leucocytosis and blood cultures grew Helcococcus kunzii Although transoesophageal echocardiography was negative for endocarditis, the patient was treated with 4 week of intravenous ceftriaxone. However, he was readmitted 6 weeks later with symptoms of fever, chills and hypoxia in setting of recurrent H. kunzii bacteraemia...
May 3, 2017: BMJ Case Reports
https://www.readbyqxmd.com/read/28473128/transcatheter-aortic-valve-implantation-within-degenerated-aortic-surgical-bioprostheses-partner-2-valve-in-valve-registry
#12
John G Webb, Michael J Mack, Jonathon M White, Danny Dvir, Philipp Blanke, Howard C Herrmann, Jonathon Leipsic, Susheel K Kodali, Raj Makkar, D Craig Miller, Philippe Pibarot, Augusto Pichard, Lowell F Satler, Lars Svensson, Maria C Alu, Rakesh M Suri, Martin B Leon
BACKGROUND: Early experience with transcatheter aortic valve replacement (TAVR) within failed bioprosthetic surgical aortic valves has shown that valve-in-valve (VIV) TAVR is a feasible therapeutic option with acceptable acute procedural results. OBJECTIVES: The authors examined 30-day and 1-year outcomes in a large cohort of high-risk patients undergoing VIV TAVR. METHODS: Patients with symptomatic degeneration of surgical aortic bioprostheses at high risk (≥50% major morbidity or mortality) for reoperative surgery were prospectively enrolled in the multicenter PARTNER (Placement of Aortic Transcatheter Valves) 2 VIV trial and continued access registries...
May 9, 2017: Journal of the American College of Cardiology
https://www.readbyqxmd.com/read/28471059/long-or-redundant-leaflet-complicating-transcatheter-mitral-valve-replacement-case-vignettes-that-advocate-for-removal-or-reduction-of-the-anterior-mitral-leaflet
#13
Adam B Greenbaum, Jose F Condado, Marvin Eng, Stamatios Lerakis, Dee Dee Wang, Dennis W Kim, Robert J Lederman, Gaetano Paone, William W O Neill, Vinod H Thourani, Vasilis C Babaliaros
Transcatheter mitral valve replacement (TMVR) procedures can be an alternative to surgical valve replacement for high surgical risk patients with bioprosthetic mitral valves, annuloplasty rings, or severe mitral annular calcification (MAC). TMVR can trigger acute left ventricular outflow tract (LVOT) obstruction from permanent displacement of the native anterior mitral leaflet toward the left ventricular septum, more often among patients undergoing valve-in-ring and valve-in-MAC procedures. Although acute LVOT obstruction is well described in the literature, there are important additional complications of TMVR related to the length and/or redundancy of the anterior mitral valve that have been recognized after mitral valve surgery and have not been previously reported in the setting of TMVR...
May 4, 2017: Catheterization and Cardiovascular Interventions
https://www.readbyqxmd.com/read/28461800/bioprosthetic-aortic-valve-replacement-in-a-donor-heart-before-orthotopic-heart-transplantation
#14
Manish Patel, Khashayar K Vahdat, Sriram Nathan, Marija Petrovic, Pranav Loyalka, Biswajit Kar, Igor D Gregoric
Current criteria for donor hearts limit the number of hearts available for transplantation, despite an increasing number of recipients on waiting lists. We report the case of a patient with ischemic cardiomyopathy and refractory ventricular tachycardia who underwent successful orthotopic heart transplantation and concurrent aortic valve replacement with a donor heart that had displayed moderate aortic valve regurgitation. The patient was a 71-year-old man with a history of advanced heart failure, 5-vessel coronary artery bypass grafting, and paroxysmal ventricular tachycardia...
April 2017: Texas Heart Institute Journal
https://www.readbyqxmd.com/read/28457092/transcatheter-tricuspid-valve-in-valve-implantation-in-patients-with-tricuspid-bioprosthetic-valve-degeneration-at-high-surgical-risk-a-multicenter-case-series
#15
Uri Landes, Arthur Kerner, Amit Segev, Haim Danenberg, Yaron Shapira, Ariel Finkelstein, Ran Kornowski
BACKGROUND: Transcatheter tricuspid valve-in-valve implantation (TVIV) is an attractive yet under-explored alternative to redo valve surgery. OBJECTIVES: To report the multicenter TVIV experience in Israel. METHODS: We approached multiple centers and collected data regarding seven TVIV cases. RESULTS: The study group comprised seven participants: five females and two males, with a mean age of 63 ± 12 years and EuroSCORE-II 13...
March 2017: Israel Medical Association Journal: IMAJ
https://www.readbyqxmd.com/read/28449781/bioprosthetic-valve-thrombosis
#16
REVIEW
Rishi Puri, Vincent Auffret, Josep Rodés-Cabau
Bioprosthetic valve (BPV) thrombosis is considered a relatively rare clinical entity. Yet a more recent analysis involving a more systematic echocardiographic follow-up, the advent of transcatheter heart valve (THV) technologies coupled with the highly sensitive nature of 4-dimensional computed tomographic imaging for detecting subclinical thrombi upon both surgically implanted and THVs, has generated enormous interest in this field, casting new light on both its true incidence and clinical relevance. Debate continues among clinicians as to both the clinical relevance of subclinical BPV thrombosis and the value of empirical oral anticoagulation following BPV implantation...
May 2, 2017: Journal of the American College of Cardiology
https://www.readbyqxmd.com/read/28444168/mechanical-versus-bioprosthetic-aortic-valve-replacement
#17
Stuart J Head, Mevlüt Çelik, A Pieter Kappetein
Mechanical valves used for aortic valve replacement (AVR) continue to be associated with bleeding risks because of anticoagulation therapy, while bioprosthetic valves are at risk of structural valve deterioration requiring reoperation. This risk/benefit ratio of mechanical and bioprosthetic valves has led American and European guidelines on valvular heart disease to be consistent in recommending the use of mechanical prostheses in patients younger than 60 years of age. Despite these recommendations, the use of bioprosthetic valves has significantly increased over the last decades in all age groups...
April 20, 2017: European Heart Journal
https://www.readbyqxmd.com/read/28442174/microstructural-alterations-owing-to-handling-of-bovine-pericardium-to-manufacture-bioprosthetic-heart-valves-a-potential-risk-for-cusp-dehiscence
#18
J Mao, Y Wang, E Philippe, T Cianciulli, I Vesely, D How, J-M Bourget, L Germain, Z Zhang, R Guidoin
INTRODUCTION: Cross-linking and anti-calcification of prosthetic heart valves have been continuously improved to prevent degeneration and calcification. However, non-calcific structural deteriorations such as cuspal dehiscences along the stent still require further analysis. MATERIAL AND METHOD: Based upon the previous analysis of an explanted valve after 7 years, a fresh commercial aortic valve was embedded in poly(methyl methacrylate) (PMMA) and cut into slices to ensure the detailed observation of the assembly and material structures...
April 22, 2017: Morphologie: Bulletin de L'Association des Anatomistes
https://www.readbyqxmd.com/read/28433356/aortic-sinus-flow-stasis-likely-in-valve-in-valve-transcatheter-aortic-valve-implantation
#19
Hoda Hatoum, Brandon L Moore, Pablo Maureira, Jennifer Dollery, Juan A Crestanello, Lakshmi Prasad Dasi
OBJECTIVE: Valve-in-valve procedures using transcatheter aortic valves are increasingly performed to treat degenerated bioprosthetic surgical aortic valves because they are less invasive than redo aortic valve replacement. The objective of this study is to quantify the changes in aortic sinus blood flow dynamics before and after a valve-in-valve procedure to gain insight into mechanisms for clinical and subclinical thrombosis of leaflets. METHODS: A detailed description of the sinus hemodynamics for valve-in-valve implantation was performed in vitro...
March 23, 2017: Journal of Thoracic and Cardiovascular Surgery
https://www.readbyqxmd.com/read/28418954/aortic-root-abscess-clearly-shown-on-111in-leukocyte-scan-but-less-obvious-on-transesophageal-echocardiogram
#20
Harleen Kaur, John Seitz, Mitchel Muhleman, David Cragg, Feng Qing
A 79-year-old man with history of aortic stenosis, status post bioprosthetic aortic valve replacement, episodes of bacteremia, and endocarditis presented to hospital with fever. Clinical assessment led to suspicion of possible endocarditis. Initial interpretation of transesophageal echocardiogram was inconclusive without vegetation in mitral/aortic valve. An In-leukocyte scan demonstrated increased uptake in the area of aortic valve, suggestive of infection. Further review of the transesophageal echocardiogram showed signs of annular abscess...
April 17, 2017: Clinical Nuclear Medicine
keyword
keyword
113441
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"