Document Detail


Longitudinal compression of the platinum-chromium everolimus-eluting stent during coronary implantation: predisposing mechanical properties, incidence and predictors in a large patient cohort.
MedLine Citation:
PMID:  22581708     Owner:  NLM     Status:  Publisher    
Abstract/OtherAbstract:
OBJECTIVE: To assess the longitudinal compression behavior of platinum-chromium everolimus-eluting stents, evaluate frequency of inadvertent longitudinal compression during percutaneous intervention, and define patient and lesion related predictors of this complication. BACKGROUN: Platinum-chromium stents of Element family have unique design features to improve flexibility that may, however, impair longitudinal stability. Incidence of longitudinal stent compression during implantation and predictors for this complication are not well understood. METHOD: Five contemporary stent platforms were longitudinally compressed in a bench test experiment, and spring constant, yield force, and ultimate strength were calculated from force-strain curves. We also evaluated all coronary cases treated with an Element stent from January 1, 2010 to October 31, 2011 for documented longitudinal compression. We compared baseline characteristics and periprocedural data between patients with and without longitudinal stent compression and assessed predictors for this event by multiple logistic regression models. RESULT: Yield force and ultimate strength were significantly lower for the Element compared with all other tested stents. In twenty patients (1.4%) and 20 lesions (0.7%) from 1,392 cases with 2,839 atherosclerotic lesions longitudinal stent compression was reported. Ostial segments, number of stents, and the presence of a bifurcation were significant predictors (adjusted odds ratios [95%-confidence intervals]: 8.33 [3.30 to 21.28], 1.57 [1.01 to 2.45], 3.57 [1.36 to 9.35], respectively). CONCLUSIO: The Element stent exhibits the lowest overall longitudinal strength compared with 4 contemporary platforms. Longitudinal compression of the Element stent is a rare complication and occurs more frequently in ostial or bifurcation lesions and with multiple stents. © 2012 Wiley Periodicals, Inc.
Authors:
Gregor Leibundgut; Michael Gick; Aurel Toma; Christian Valina; Nikolaus Löffelhardt; Heinz Joachim Büttner; Franz-Josef Neumann
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Publication Detail:
Type:  JOURNAL ARTICLE     Date:  2012-5-14
Journal Detail:
Title:  Catheterization and cardiovascular interventions : official journal of the Society for Cardiac Angiography & Interventions     Volume:  -     ISSN:  1522-726X     ISO Abbreviation:  -     Publication Date:  2012 May 
Date Detail:
Created Date:  2012-5-14     Completed Date:  -     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  100884139     Medline TA:  Catheter Cardiovasc Interv     Country:  -    
Other Details:
Languages:  ENG     Pagination:  -     Citation Subset:  -    
Copyright Information:
Copyright © 2012 Wiley Periodicals, Inc.
Affiliation:
Klinik für Kardiologie und Angiologie II, Unversitäts-Herzzentrum Freiburg - Bad Krozingen, Suedring 15, 79189 Bad Krozingen, Germany. kardiologie@mac.com.
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