In this paper, we look at the case of a 79 years old male who received a Wiktor stent (WS) implantation for myocardial infarction in proximal left anterior descending artery 18 years ago. Eleven years later, an Everolimus eluting stent (EES; Xience V™) was implanted for the proximal edge restenosis of WS from mid left main trunk to the middle part of WS. Seven years after EES implantation, the angiography and optical coherence tomography revealed in-stent restenosis with severe stent recoil just distal to the overlapping zone of WS. In the present case, stent recoil seems to have occurred due to different radial stiffness and flexibility between the two stents.
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http://dx.doi.org/10.1536/ihj.18-261 | DOI Listing |
Front Bioeng Biotechnol
December 2024
School of Aeronautic Science and Engineering, Beihang University, Beijing, China.
Introduction: In-stent restenosis remains a significant challenge in coronary artery interventions. This study aims to explore the relationship between exercise intensity and stent design, focusing on the coupled response of the stent structure and hemodynamics at different exercise intensities.
Methods: A coupled balloon-stent-plaque-artery model and a fluid domain model reflecting structural deformation were developed to investigate the interaction between coronary stents and stenotic vessels, as well as their impact on hemodynamics.
Bioact Mater
April 2025
University of Coimbra, CEMMPRE, Department of Mechanical Engineering, 3030-788, Coimbra, Portugal.
Polymeric coronary stents, like the ABSORB™, are commonly used to treat atherosclerosis due to their bioresorbable and cell-compatible polymer structure. However, they face challenges such as high strut thickness, high elastic recoil, and lack of radiopacity. This study aims to address these limitations by modifying degradable stents produced by additive manufacturing with poly(lactic acid) (PLA) and poly(ε-caprolactone) (PCL) with degradable metallic coatings, specifically zinc (Zn) and magnesium (Mg), deposited via radiofrequency (rf) magnetron sputtering.
View Article and Find Full Text PDFJ Endovasc Ther
December 2024
Division of Nephrology, Department of Internal Medicine, Faculty of Medicine, Prince of Songkla University, Songkhla, Thailand.
J Thorac Dis
October 2024
Department of Cardiovascular Surgery, Osaka Metropolitan University Postgraduate School of Medicine, Osaka, Japan.
Background: Changes in stent graft (SG) orientation after frozen elephant trunk (FET) treatment for aortic arch aneurysms are not well understood. This study investigated changes in SG orientation and their effects on aortic events after FET for aortic arch aneurysms.
Methods: This study included 57 patients with true aneurysms who underwent elective total arch replacement using FET between 2016 and 2023.
Eur J Cardiothorac Surg
November 2024
Department of Electrical and Mechanical Engineering, Nagoya Institute of Technology, Aichi, Japan.
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