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https://www.readbyqxmd.com/read/28315492/long-term-in-vivo-corrosion-behavior-biocompatibility-and-bioresorption-mechanism-of-a-bioresorbable-nitrided-iron-scaffold
#1
Wenjiao Lin, Li Qin, Haiping Qi, Deyuan Zhang, Gui Zhang, Runlin Gao, Hong Qiu, Ying Xia, Ping Cao, Xiang Wang, Wei Zheng
Pure iron as a potential bioresorbable material for bioresorbable coronary scaffold has major disadvantages of slow corrosion and bioresorption. However, so far, there are neither quantitative data of long-term in vivo corrosion nor direct experimental evidence for bioresorption of pure iron and its alloys, which are fundamental and vital for developing novel Fe-based alloys overcoming the intrinsic drawbacks of pure iron. This work systemically investigated scaffold performance, long-term in vivo corrosion behavior and biocompatibility of a nitrided iron coronary scaffold and explored its bioresorption mechanism...
March 14, 2017: Acta Biomaterialia
https://www.readbyqxmd.com/read/28315123/coronary-stents-in-diabetic-patients-state-of-the-knowledge
#2
REVIEW
Pablo Codner, Hitinder Singh Gurm, Apurva Motivala
PURPOSE OF REVIEW: This review article aims to summarize the findings of the most relevant research that compared the use of paclitaxel vs. "limus" based drug eluting stent (DES) in diabetic patients and to define the current state of knowledge with new stent technologies in this patient population. RECENT FINDINGS: Since drug eluting stents (DES) were introduced, it has been of great interest to establish whether paclitaxel or sirolimus eluting stents have the same safety and efficacy features for patients with coronary artery disease...
April 2017: Current Cardiology Reports
https://www.readbyqxmd.com/read/28314675/a-hybrid-strategy-with-bioresorbable-vascular-scaffolds-and-drug-eluting-stents-for-treating-complex-coronary-lesions
#3
Richard J Jabbour, Alfonso Ielasi, Akihito Tanaka, Massimo Leoncini, Bernado Cortese, Giulietta Grigis, Satoru Mitomo, Damiano Regazzoli, Gaetano Di Palma, Claudio Rapetto, Maurizio Tespili, Antonio Colombo, Azeem Latib
BACKGROUND: Due to the inherent limitations of current generation BVSs, complex coronary artery disease often contains BVS unsuitable segments. Our aim was to assess the feasibility of a hybrid approach using bioresorbable vascular scaffolds (BVSs) and drug-eluting stents (DESs) for the treatment of complex coronary artery lesions not suitable for a scaffolding only approach. METHODS: A retrospective multicenter cohort analysis was performed on patients with complex de novo or in-stent restenosis lesions treated with a hybrid BVS (Absorb BVS, Abbott Vascular, Santa Clara, CA) and DES strategy...
March 8, 2017: Cardiovascular Revascularization Medicine: Including Molecular Interventions
https://www.readbyqxmd.com/read/28299676/bioresorbable-scaffolds-for-coronary-stenosis-when-and-how-based-upon-current-studies
#4
REVIEW
Alexandre Abizaid, J Ribamar Costa
PURPOSE OF REVIEW: First-generation bioresorbable scaffolds (BRS), largely represented by the poly-l-lactic acid (PLLA) ABSORB (Abbott Vascular, Temecula, Illinois, US), have demonstrated, in low to moderate lesion complexity, similar efficacy to current generation metallic drug-eluting stents. However, a trend toward more device thrombosis has been observed, especially when the scaffolds are used in off-label situations. In this review, we address the most relevant drawbacks of these devices and, based on the available scientific data, we visit the scenarios where there is more uncertainty about their indication, trying to identify the lesions/patients to whom this technology should be voided at its current stage of development...
March 2017: Current Cardiology Reports
https://www.readbyqxmd.com/read/28295999/fracture-with-the-newer-bioresorbable-vascular-scaffolds
#5
Mostafa Elwany, Gaetano Di Palma, Bernardo Cortese
Bioresorbable vascular scaffolds (BVS) are being increasingly used in complex, real-world lesions. The possibility of strut fractures is a rare entity with the use of drug eluting stents (DES), but has not yet been adequately described for the BVS technology. In this report, we present a case of scaffold fracture of DEsolve BVS (Elixir Medical Corporation, USA) that was diagnosed both angiographically and by optical coherence tomography(OCT). Scaffold fracture with the newer BVS is a new Achilles' heel in the BVS technology...
March 15, 2017: Catheterization and Cardiovascular Interventions
https://www.readbyqxmd.com/read/28279311/antiplatelet-therapy-after-implantation-of%C3%A2-bioresorbable-vascular-scaffolds-a-review-of-the-published-data-practical-recommendations-and%C3%A2-future-directions
#6
REVIEW
Davide Capodanno, Dominick J Angiolillo
The introduction of bioresorbable vascular scaffolds (BVS) for clinical use has raised a number of questions on whether current dual-antiplatelet therapy (DAPT) recommendations after drug-eluting stent (DES) implantation, mostly deriving from data on second-generation DES, are also applicable to this completely different technology. This article aims to review the technical shortcomings of BVS-the most extensively studied fully bioresorbable coronary stent-and its contemporary rates of scaffold thrombosis, with a focus on recommendations for DAPT duration...
March 13, 2017: JACC. Cardiovascular Interventions
https://www.readbyqxmd.com/read/28275942/bioresorbable-polymers-and-stent-devices
#7
REVIEW
Payam Dehghani
Percutaneous coronary interventions will never become obsolete, as evolution is inherent to interventional cardiology. Current drug-eluting platforms have appreciably improved their safety and efficacy profiles in different clinical settings compared to first-generation devices such that it is difficult to consider other alternatives. However, there is definite biological plausibility to consider devices with bioabsorbable polymers and/or scaffolds. It is also an undeniable fact that many patients, based on variety of belief systems, would prefer not to have a permanently implanted device...
February 2017: Current Treatment Options in Cardiovascular Medicine
https://www.readbyqxmd.com/read/28262625/is-quantitative-coronary-angiography-reliable-in-assessing-the-late-lumen-loss-of-the-everolimus-eluting-bioresorbable-polylactide-scaffold-in-comparison-with-the-cobalt-chromium-metallic-stent
#8
Yohei Sotomi, Yoshinobu Onuma, Yosuke Miyazaki, Taku Asano, Yuki Katagiri, Erhan Tenekecioglu, Hans Jonker, Jouke Dijkstra, Robbert J de Winter, Joanna J Wykrzykowska, Gregg W Stone, Jeffrey J Popma, Ken Kozuma, Kengo Tanabe, Patrick W Serruys, Takeshi Kimura
AIMS: Immediately after stent/scaffold implantation, quantitative coronary angiography (QCA) with respect to optical coherence tomography (OCT) more severely underestimates the lumen diameter (LD) in Absorb than in XIENCE. This OCT-QCA discrepancy has not been evaluated at long-term follow-up. The present study aimed to assess the accuracy of QCA with reference to OCT in Absorb as compared to XIENCE. METHODS AND RESULTS: We assessed 2-year QCA and OCT in the ABSORB Japan randomized trial (Absorb n=87, XIENCE n=44)...
March 7, 2017: EuroIntervention
https://www.readbyqxmd.com/read/28262623/second-generation-magnesium-scaffold-magmaris-device-design-and-preclinical-evaluation-in-a-porcine-coronary-artery-model
#9
Ron Waksman, Philine Zumstein, Martin Pritsch, Eric Wittchow, Michael Haude, Capucine Lapointe-Corriveau, Guy Leclerc, Michael Joner
AIMS: The second-generation drug-eluting absorbable magnesium scaffold Magmaris, recently introduced for treatment of obstructive coronary atherosclerotic lesions, suggests a good safety profile, but preclinical assessment is important for predicting clinical performance. METHODS AND RESULTS: Ninety Magmaris scaffolds were implanted into non-diseased porcine and rabbit models. A bioresorbable vascular scaffold (Absorb) and the permanent drugeluting stent (Xience Xpedition) served as controls...
March 7, 2017: EuroIntervention
https://www.readbyqxmd.com/read/28258843/mid-to-long-term-outcome-of-patients-treated-with-everolimus-eluting-bioresorbable-vascular-scaffolds-data-of-the-bvs-registry-g%C3%A3-ttingen-predominantly-from-acs-patients
#10
Kristian Hellenkamp, Alexander Becker, Yannick D Gabriel, Gerd Hasenfuß, Mark Hünlich, Claudius Jacobshagen, Wolfgang Schillinger, Marco R Schroeter
BACKGROUND: Bioresorbable vascular scaffolds (BVS) are widely used in routine clinical practice. While previous studies reported acceptable short- to midterm outcome after BVS implantation, data on longer-term outcome are rare. METHODS: Patients treated with at least one Absorb®-BVS were consecutively enrolled. Follow-up data were assessed after 834.0 [769.0-1026.0] days. The primary device-oriented composite endpoint (DOCE) was defined as cardiovascular death, myocardial infarction (MI) and/or target lesion revascularization (TLR)...
May 1, 2017: International Journal of Cardiology
https://www.readbyqxmd.com/read/28257775/emerging-and-future-therapeutic-options-for-femoropopliteal-and-infrapopliteal-endovascular-intervention
#11
REVIEW
Damianos G Kokkinidis, Ehrin J Armstrong
Despite recent advances in endovascular therapy for peripheral artery disease, current technologies remain limited by rates of long-term restenosis and application to complex lesion subsets. This article presents data on upcoming therapies, including novel drug-coated balloons, drug-eluting stents, bioresorbable scaffolds, novel drug delivery therapies to target arteries, techniques to limit postangioplasty dissection, and treatment of severely calcified lesions.
April 2017: Interventional cardiology clinics
https://www.readbyqxmd.com/read/28257770/nitinol-self-expanding-stents-for-the-superficial-femoral-artery
#12
REVIEW
Ashwin Nathan, Taisei Kobayashi, Jay Giri
The superficial femoral artery is a complex artery subject to a unique set of biomechanical loading conditions in its course through the leg. Plain balloon angioplasty and balloon-expandable stents had unacceptably high rates of restenosis, necessitating target vessel revascularization. Nitinol alloy is well suited to provide the strength and flexibility needed of stents to withstand the external forces posed by the environment of the superficial femoral artery. Advances in stent technology with the addition of a slow-releasing antiproliferative agent and changes in scaffold design have shown promise in reducing the rates of stent fracture and in-stent restenosis...
April 2017: Interventional cardiology clinics
https://www.readbyqxmd.com/read/28254259/follow-up-of-coronary-artery-patency-after-implantation-of-bioresorbable-coronary-scaffolds-the-emerging-role-of-magnetic-coronary-artery-imaging
#13
REVIEW
Marco Zuin, Gianluca Rigatelli, Fiorenzo Scaranello, Massimo Rinuncini, Claudio Picariello, Katia D'Elia, Majlinda Fejzo, Loris Roncon
Bioresorbable vascular scaffolds (BVSs) represent the newest tool in the treatment of coronary artery disease (CAD). Conversely to the previous metal stents and thanks to the polylactate-based backbone, BVSs could be visualized by magnetic resonance imaging (MRI) without artifacts. These properties allow a potential non-invasive assessment of coronary artery patency after percutaneous coronary intervention (PCI), avoiding cardiac catheterization included iodine contrast and radiation exposure, and potentially more sophisticated imaging tool as the optical coherence tomography (OCT)...
February 7, 2017: Cardiovascular Revascularization Medicine: Including Molecular Interventions
https://www.readbyqxmd.com/read/28220461/new-generation-coronary-stents-current-data-and-future-directions
#14
REVIEW
Ankur Kalra, Hasan Rehman, Sahil Khera, Braghadheeswar Thyagarajan, Deepak L Bhatt, Neal S Kleiman, Robert W Yeh
PURPOSE OF REVIEW: Drug-eluting stents are the mainstay in the treatment of coronary artery disease using percutaneous coronary intervention. Innovations developed to overcome the limitations of prior generations of stents include biodegradable polymer stents, drug-eluting stents without a polymer, and bioabsorbable scaffolds. Our review briefly discusses the clinical profiles of first- and second-generation coronary stents, and provides an up-to-date overview of design, technology, and clinical safety and efficacy profiles of newer generation coronary stents discussing the relevant clinical trials in this rapidly evolving area of interventional cardiology...
March 2017: Current Atherosclerosis Reports
https://www.readbyqxmd.com/read/28216214/everolimus-versus-novolimus-eluting-bioresorbable-scaffolds-for-the-treatment%C3%A2-of-coronary-artery-disease-a-matched-comparison
#15
Jens Wiebe, Oliver Dörr, Hanna Ilstad, Oliver Husser, Christoph Liebetrau, Niklas Boeder, Timm Bauer, Helge Möllmann, Adnan Kastrati, Christian W Hamm, Holger M Nef
OBJECTIVES: The purpose of this study was to compare the 1-year outcome of everolimus-eluting bioresorbable scaffolds (eBRS) and Novolimus-eluting bioresorbable scaffolds (nBRS) in patients undergoing percutaneous coronary intervention in a real-life clinical practice scenario. BACKGROUND: eBRS and nBRS are available and have been proved safe for coronary artery stenting in well-selected patients. METHODS: Consecutive patients who underwent bioresorbable scaffold implantation were evaluated retrospectively via 2:1 propensity matching...
February 9, 2017: JACC. Cardiovascular Interventions
https://www.readbyqxmd.com/read/28165708/preparation-characterization-and-mechanism-for-biodegradable-and-biocompatible-polyurethane-shape-memory-elastomers
#16
Yu-Chun Chien, Wei-Tsung Chuang, U-Ser Jeng, Shan-Hui Hsu
Thermally induced shape memory is an attractive feature of certain functional materials. Among the shape memory polymers, shape memory elastomers (SMEs) especially those with biodegradability have great potential in the biomedical field. In this study, we prepared waterborne biodegradable polyurethane SME based on poly(ε-caprolactone) (PCL) oligodiol and poly(l-lactic acid) (PLLA) oligodiol as the mixed soft segments. The ratio of the soft segments in polyurethanes was optimized for shape memory behavior. The thermally induced shape memory mechanism of the series of polyurethanes was clarified using differential scanning calorimeter (DSC), X-ray diffraction (XRD), and small-angle X-ray scattering (SAXS)...
February 6, 2017: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/28160103/stents-biomechanics-biomaterials-and-insights-from-computational-modeling
#17
REVIEW
Georgia S Karanasiou, Michail I Papafaklis, Claire Conway, Lampros K Michalis, Rami Tzafriri, Elazer R Edelman, Dimitrios I Fotiadis
Coronary stents have revolutionized the treatment of coronary artery disease. Improvement in clinical outcomes requires detailed evaluation of the performance of stent biomechanics and the effectiveness as well as safety of biomaterials aiming at optimization of endovascular devices. Stents need to harmonize the hemodynamic environment and promote beneficial vessel healing processes with decreased thrombogenicity. Stent design variables and expansion properties are critical for vessel scaffolding. Drug-elution from stents, can help inhibit in-stent restenosis, but adds further complexity as drug release kinetics and coating formulations can dominate tissue responses...
February 3, 2017: Annals of Biomedical Engineering
https://www.readbyqxmd.com/read/28158421/fate-of-post-procedural-malapposition-of-everolimus-eluting-polymeric-bioresorbable-scaffold-and-everolimus-eluting-cobalt-chromium-metallic-stent-in-human-coronary-arteries-sequential-assessment-with-optical-coherence-tomography-in-absorb-japan-trial
#18
Yohei Sotomi, Yoshinobu Onuma, Jouke Dijkstra, Yosuke Miyazaki, Ken Kozuma, Kengo Tanabe, Jeffrey J Popma, Robbert J de Winter, Patrick W Serruys, Takeshi Kimura
No abstract text is available yet for this article.
January 30, 2017: European Heart Journal Cardiovascular Imaging
https://www.readbyqxmd.com/read/28149537/drug-eluting-stent-restenosis-treatment-an-old-stent-a-new-balloon-or-a-newer-scaffold
#19
EDITORIAL
Dario Buccheri, Giuliana Cimino
No abstract text is available yet for this article.
December 2016: Journal of Thoracic Disease
https://www.readbyqxmd.com/read/28145045/intraluminal-bioresorbable-vascular-scaffold-dismantling-with-aneurysm-formation-leading-to-very-late-thrombosis
#20
Amisha Patel, Tamim Nazif, Gregg W Stone, Ziad A Ali
Coronary artery aneurysm formation has been described in patients after the placement of first-generation drug-eluting stents (DES), but is less common with newer generation metallic stents. In contrast, coronary artery aneurysm formation may be more common with the use of bioresorbable vascular scaffolds (BVS) due to the frequent formation of evaginations in the arterial wall seen with BVS. In this article, we describe a unique case of BVS dismantling and thrombus formation leading to an acute coronary syndrome thirty-two months after initial BVS placement...
February 1, 2017: Catheterization and Cardiovascular Interventions
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