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Bioprosthetics

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https://www.readbyqxmd.com/read/28935328/valve-in-valve-transcatheter-aortic-valve-implantation-a-novel-approach-to-treat-paravalvular-leak
#1
Pranav Loyalka, Kelsey B Montgomery, Tom C Nguyen, Richard W Smalling, Melissa Howe, Keshava Rajagopal
Enlarging or "cracking" a surgical stented bioprosthetic valve during valve-in-valve transcatheter aortic valve implantation (TAVI) increases orifice area, reducing transvalvular energy losses. We demonstrate that TAVI with valve cracking can be used to treat paravalvular leak (PVL) while providing optimal aortic valve physiology. A 61-year-old woman with a history of aortic valve replacement with a stented bioprosthesis presented with heart failure. Transthoracic echocardiography revealed severe prosthetic aortic valve stenosis with PVL and severe regurgitation...
October 2017: Annals of Thoracic Surgery
https://www.readbyqxmd.com/read/28933244/ventricular-fibrillation-and-myocardial-depression-following-pulmonary-valve-replacement-in-tetralogy-of-fallot-with-an-intramural-coronary-artery-and-coronary-artery-compression-by-chest-tube
#2
Mubbasheer Ahmed, Nathan E Thompson, Susan R Foerster, Michele A Frommelt, Michael E Mitchell, John P Scott
We describe the case of a 10-year-old male with a history of repaired Tetralogy of Fallot and known intramural right coronary artery (RCA) who presented for bioprosthetic pulmonary valve replacement. The operation was complicated by postoperative ventricular fibrillation arrest. Selective coronary angiography revealed external compression of the mid-RCA by a mediastinal chest tube that improved immediately upon removal of the tube. Ultimately, the patient required additional unroofing of the intramural coronary for full recovery...
January 1, 2017: World Journal for Pediatric & Congenital Heart Surgery
https://www.readbyqxmd.com/read/28930078/how-should-i-treat-recurrent-severe-paravalvular-leakage-after-successful-interventional-closure-of-a-symptomatic-paravalvular-leak-with-four-plug-devices-following-complicated-bioprosthetic-aortic-valve-replacement-the-importance-of-closely-monitoring-patients
#3
https://www.readbyqxmd.com/read/28917497/comparison-of-outcome-of-possible-versus-definite-infective-endocarditis-involving-prosthetic-or-bioprosthetic-heart-valves
#4
Laurent Fauchier, Lauriane Pericart, Thierry Bourguignon, Thibaud Genet, Arnaud Bisson, Anne Bernard, Louis Bernard, Dominique Babuty
The objectives of this study were to describe and compare the clinical characteristics and outcomes of patients with definite and possible infective endocarditis (IE) involving prosthetic heart valve, and to identify prognostic factors for long-term mortality, using data from an unselected cohort of consecutive patients. We studied data from 133 consecutive patients with IE involving prosthetic heart valve seen in an academic institution between 1990 and 2012. Patients were classified according to the modified Duke criteria for IE: patients with possible IE (n = 47, 35%) and patients with definite IE (n = 86, 65%)...
August 7, 2017: American Journal of Cardiology
https://www.readbyqxmd.com/read/28916901/pulmonic-valve-disease-review-of-pathology-and-current-treatment-options
#5
REVIEW
Mouhammad Fathallah, Richard A Krasuski
PURPOSE OF REVIEW: Our review is intended to provide readers with an overview of disease processes involving the pulmonic valve, highlighting recent outcome studies and guideline-based recommendations; with focus on the two most common interventions for treating pulmonic valve disease, balloon pulmonary valvuloplasty and pulmonic valve replacement. RECENT FINDINGS: The main long-term sequelae of balloon pulmonary valvuloplasty, the gold standard treatment for pulmonic stenosis, remain pulmonic regurgitation and valvular restenosis...
September 16, 2017: Current Cardiology Reports
https://www.readbyqxmd.com/read/28915471/characterization-of-mechanical-properties-of-pericardium-tissue-using-planar-biaxial-tension-and-flexural-deformation
#6
Kyle Murdock, Caitlin Martin, Wei Sun
Flexure is an important mode of deformation for native and bioprosthetic heart valves. However, mechanical characterization of bioprosthetic leaflet materials has been done primarily through planar tensile testing. In this study, an integrated experimental and computational cantilever beam bending test was performed to characterize the flexural properties of glutaraldehyde-treated bovine and porcine pericardium of different thicknesses. A strain-invariant based structural constitutive model was used to model the pericardial mechanical behavior quantified through the bending tests of this study and the planar biaxial tests previously performed...
September 12, 2017: Journal of the Mechanical Behavior of Biomedical Materials
https://www.readbyqxmd.com/read/28913586/evolving-indications-for-transcatheter-aortic-valve-interventions
#7
REVIEW
Anna Franzone, Thomas Pilgrim, Stefan Stortecky, Stephan Windecker
PURPOSE OF REVIEW: The purpose of this review was to summarize recent progress in the field of transcatheter aortic valve replacement (TAVR), discuss expansion of indications, and identify areas of future clinical applications. RECENT FINDINGS: Favorable clinical outcomes as well as continued refinement of transcatheter heart valve technology have prompted the continuous expansion of indications for TAVR. The results of randomized clinical trials comparing the safety and efficacy of TAVR relative to conventional surgical aortic valve replacement (SAVR) in lower- than high-risk patients have recently been published, and trials among lower-risk categories are ongoing...
September 14, 2017: Current Cardiology Reports
https://www.readbyqxmd.com/read/28894654/evaluation-of-a-novel-hybrid-viable-bioprosthetic-mesh-in-a-model-of-mesh-infection
#8
Ally Ha, Erik T Criman, Wendy E Kurata, Karen W Matsumoto, Lisa M Pierce
BACKGROUND: The reported incidence of mesh infection in contaminated operative fields is as high as 30% regardless of material used. Our laboratory previously showed that augmenting acellular bioprosthetic mesh with allogeneic mesenchymal stem cells (MSC) enhances resistance to bacterial colonization in vivo and preserves mesh integrity. This study's aim was to determine whether augmentation of non-crosslinked porcine dermis (Strattice) with commercially available, cryopreserved, viable MSC-containing human placental tissue (Stravix) similarly improves infection resistance after inoculation with Escherichia coli (E...
August 2017: Plastic and Reconstructive Surgery. Global Open
https://www.readbyqxmd.com/read/28894058/-ruptured-aneurysm-of-the-sinus-of-valsalva-accompanied-with-a-bicuspid-aortic-valve-in-an-elderly-man-report-of-a-case
#9
Toshifumi Murase, Susumu Tamura, Yasuhiro Ohzeki, Kunio Ebine
The combination of ruptured aneurysm of the sinus of Valsalva and a bicuspid aortic valve is very rare in an elderly person. A 71-year-old man with ruptured aneurysm of the sinus of Valsalva and a bicuspid aortic valve had undergone an operation. He was admitted to his other hospital because of heart failure. He was transferred to our hospital to undergo treatment for ruptured aneurysm of sinus of Valsalva. At our hospital, echocardiography findings showed ruptured aneurysm of the sinus of Valsalva, a ventricular septal defect (VSD), and severe aortic regurgitation with moderate stenosis of the bicuspid aortic valve...
September 2017: Kyobu Geka. the Japanese Journal of Thoracic Surgery
https://www.readbyqxmd.com/read/28874031/standardized-definitions-of-structural-deterioration-and-valve-failure-in-assessing-long-term-durability-of-transcatheter-and-surgical-aortic-bioprosthetic-valves-a-consensus-statement-from-the-european-association-of-percutaneous-cardiovascular-interventions
#10
Davide Capodanno, Anna S Petronio, Bernard Prendergast, Helene Eltchaninoff, Alec Vahanian, Thomas Modine, Patrizio Lancellotti, Lars Sondergaard, Peter F Ludman, Corrado Tamburino, Nicolò Piazza, Jane Hancock, Julinda Mehilli, Robert A Byrne, Andreas Baumbach, Arie Pieter Kappetein, Stephan Windecker, Jeroen Bax, Michael Haude
No abstract text is available yet for this article.
September 1, 2017: European Journal of Cardio-thoracic Surgery
https://www.readbyqxmd.com/read/28862965/subclinical-valve-thrombosis-in-sutureless-bioprosthetic-valves
#11
EDITORIAL
Bobby Yanagawa, Subodh Verma, C David Mazer
No abstract text is available yet for this article.
August 21, 2017: Journal of the American Heart Association
https://www.readbyqxmd.com/read/28862959/hypo-attenuated-leaflet-thickening-and-reduced-leaflet-motion-in-sutureless-bioprosthetic-aortic-valves
#12
Magnus Dalén, Ulrik Sartipy, Kerstin Cederlund, Anders Franco-Cereceda, Anders Svensson, Raquel Themudo, Peter Svenarud, Elin Bacsovics Brolin
BACKGROUND: The prevalence of hypo-attenuated leaflet thickening (HALT) and reduced leaflet motion (RLM) is unknown in surgically implanted bioprostheses because systematic investigation of HALT and/or RLM is limited to a few catheter-based valves. The aim of this study was to investigate the prevalence of HALT and RLM by cardiac computed tomography in patients who underwent surgical aortic valve replacement and received a Perceval sutureless aortic valve bioprosthesis. METHODS AND RESULTS: This was a single-center prospective observational study that included 47 patients (83...
August 21, 2017: Journal of the American Heart Association
https://www.readbyqxmd.com/read/28854488/histological-and-biomechanical-characterization-of-decellularized-porcine-pericardium-as-a-potential-scaffold-for-tissue-engineering-applications
#13
Panagiotis Mallis, Efstathios Michalopoulos, Constantine Dimitriou, Nikolaos Kostomitsopoulos, Catherine Stavropoulos-Giokas
BACKGROUND: Each year, more than 800,000 vascular and cardiac surgeries are performed therefore, there is a great need for suitable material for bioprosthetic operations. Porcine pericardium is a double-walled sac that covers the heart and can be used in vascular and cardiac thoracic surgery. OBJECTIVE: The aim of the present study was to evaluate the decellularization process and biomechanical properties in porcine pericardial tissue after the decellularization treatment...
2017: Bio-medical Materials and Engineering
https://www.readbyqxmd.com/read/28844512/meta-analysis-of-usefulness-of-anticoagulation-after-transcatheter-aortic-valve-implantation
#14
REVIEW
Kinjal Banerjee, Kanhaiya Poddar, Stephanie Mick, Jonathon White, Amar Krishnaswamy, Douglas Johnston, Leonardo Rodriguez, E Murat Tuzcu, Samir Kapadia
Since the advent of bioprosthetic valves, the implications of long-term anticoagulation after valve replacement are unclear. There are very little data on outcomes of long-term anticoagulation after transcatheter aortic valve implantation (TAVI). Our aim was to conduct a systematic review of literature regarding anticoagulation after TAVI. The existing literature on anticoagulation after bioprosthetic valve replacement was thoroughly reviewed, including the most recent American College of Cardiology/American Heart Association 2017 guidelines for management of valvular disease, which is based on sparse, nonrandomized retrospective data...
August 1, 2017: American Journal of Cardiology
https://www.readbyqxmd.com/read/28843367/transcatheter-tricuspid-valve-in-valve-intervention-for-degenerative-bioprosthetic-tricuspid-valve-disease
#15
REVIEW
Fabien Praz, Isaac George, Susheel Kodali, Konstantinos P Koulogiannis, Linda D Gillam, Mary Z Bechis, David Rubenson, Wei Li, Alison Duncan
Isolated reoperative tricuspid valve replacement is one of the highest risk operations classified in the Society of Thoracic Surgeons registry, particularly in the setting of preexisting right ventricular dysfunction. Transcatheter tricuspid valve-in-valve implantation represents an attractive alternative to redo surgery in patients with tricuspid bioprosthetic valve degeneration who are considered high-risk or unsuitable surgical candidates. In this review article, the authors discuss the emergence of transcatheter tricuspid valve-in-valve therapy, preprocedural echocardiographic assessment of tricuspid bioprosthetic valve dysfunction, periprocedural imaging required for tricuspid valve-in-valve implantation, and postprocedural assessment of tricuspid transcatheter device function...
August 23, 2017: Journal of the American Society of Echocardiography
https://www.readbyqxmd.com/read/28838517/ruptured-papillary-muscles-after-chordae-preserving-bioprosthetic-mitral-valve-replacement
#16
Matthew Fischer, Ali Salehi, Michael J Sopher, Gabriel Vorobiof, Richard J Shemin
Bioprosthetic valve-associated masses in the perioperative period are rare. This report describes the case of a 68-year-old man with perivalvular masses that were initially discovered on a routine postoperative transthoracic echocardiogram 7 days after chordae-preserving mitral valve replacement and coronary artery bypass grafting. An intraoperative transesophageal echocardiogram demonstrated ruptured papillary muscles. This case report describes the differential diagnosis and surgical management of this rare finding...
September 2017: Annals of Thoracic Surgery
https://www.readbyqxmd.com/read/28838487/cardioscopically-guided-beating-heart-surgery-paravalvular-leak-repair
#17
Benoit Rosa, Zurab Machaidze, Margherita Mencattelli, Sunil Manjila, Borami Shin, Karl Price, Michael A Borger, Vinod Thourani, Pedro Del Nido, David W Brown, Christopher W Baird, John E Mayer, Pierre E Dupont
PURPOSE: There remains a paucity of direct visualization techniques for beating-heart intracardiac procedures. To address this need, we evaluated a novel cardioscope in the context of aortic paravalvular leaks (PVLs) localization and closure. DESCRIPTION: A porcine aortic PVL model was created using a custom-made bioprosthetic valve, and PVL presence was verified by epicardial echocardiography. Transapical delivery of occlusion devices guided solely by cardioscopy was attempted 13 times in a total of three pigs...
September 2017: Annals of Thoracic Surgery
https://www.readbyqxmd.com/read/28838360/transcatheter-mitral-valve-replacement-for-degenerated-bioprosthetic-valves-and%C3%A2-failed%C3%A2-annuloplasty-rings
#18
MULTICENTER STUDY
Sung-Han Yoon, Brian K Whisenant, Sabine Bleiziffer, Victoria Delgado, Niklas Schofer, Lena Eschenbach, Buntaro Fujita, Rahul Sharma, Marco Ancona, Ermela Yzeiraj, Stefano Cannata, Colin Barker, James E Davies, Antonio H Frangieh, Florian Deuschl, Tomaz Podlesnikar, Masahiko Asami, Abhijeet Dhoble, Anthony Chyou, Jean-Bernard Masson, Harindra C Wijeysundera, Daniel J Blackman, Rajiv Rampat, Maurizio Taramasso, Enrique Gutierrez-Ibanes, Tarun Chakravarty, Guiherme F Attizzani, Tsuyoshi Kaneko, S Chiu Wong, Horst Sievert, Fabian Nietlispach, David Hildick-Smith, Luis Nombela-Franco, Lenard Conradi, Christian Hengstenberg, Michael J Reardon, Albert Markus Kasel, Simon Redwood, Antonio Colombo, Saibal Kar, Francesco Maisano, Stephan Windecker, Thomas Pilgrim, Stephan M Ensminger, Bernard D Prendergast, Joachim Schofer, Ulrich Schaefer, Jeroen J Bax, Azeem Latib, Raj R Makkar
BACKGROUND: Limited data exist regarding transcatheter mitral valve replacement (TMVR) for patients with failed mitral valve replacement and repair. OBJECTIVES: This study sought to evaluate the outcomes of TMVR in patients with failed mitral bioprosthetic valves (valve-in-valve [ViV]) and annuloplasty rings (valve-in-ring [ViR]). METHODS: From the TMVR multicenter registry, procedural and clinical outcomes of mitral ViV and ViR were compared according to Mitral Valve Academic Research Consortium criteria...
August 29, 2017: Journal of the American College of Cardiology
https://www.readbyqxmd.com/read/28838044/natural-history-of-subclinical-leaflet-thrombosis-affecting-motion-in-bioprosthetic-aortic-valves
#19
Lars Sondergaard, Ole De Backer, Klaus F Kofoed, Hasan Jilaihawi, Andreas Fuchs, Tarun Chakravarty, Mohammad Kashif, Yoshio Kazuno, Hiroyuki Kawamori, Yoshio Maeno, Gintautas Bieliauskas, Hongfei Guo, Gregg W Stone, Raj Makkar
Aims: Four-dimensional volume-rendered computed tomography (4DCT) has demonstrated instances of hypo-attenuating leaflet thickening (HALT) with or without hypo-attenuation affecting motion (HAM) after transcatheter and surgical aortic valve implantation (TAVI, SAVR). The temporal pattern of evolution of these phenomena is uncertain. Methods and results: The SAVORY registry enrolled patients treated by TAVI (n = 75) or SAVR (n = 30) with two 4DCT scans fully interpretable for HALT and HAM as well as unchanged anti-thrombotic medication between the scans...
July 21, 2017: European Heart Journal
https://www.readbyqxmd.com/read/28838043/further-insight-into-transcatheter-and-surgical-aortic-bioprosthetic-valve-thrombosis
#20
Jeroen J Bax, Victoria Delgado
No abstract text is available yet for this article.
July 21, 2017: European Heart Journal
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