Document Detail

Biodegradable elastic patch plasty ameliorates left ventricular adverse remodeling after ischemia-reperfusion injury: a preclinical study of a porous polyurethane material in a porcine model.
MedLine Citation:
PMID:  23219497     Owner:  NLM     Status:  MEDLINE    
OBJECTIVE: Myocardial infarction (MI) can lead to irreversible adverse left ventricular remodeling resulting in subsequent severe dysfunction. The objective of this study was to investigate the potential for biodegradable, elastomeric patch implantation to positively alter the remodeling process after MI in a porcine model.
METHODS: Yorkshire pigs underwent a 60-minute catheter balloon occlusion of the left circumflex artery. Two weeks after MI animals underwent epicardial placement of a biodegradable, porous polyurethane (poly(ester urethane)urea; PEUU) patch (MI+PEUU, n = 7) or sham surgery (MI+sham, n = 8). Echocardiography before surgery and at 4 and 8 weeks after surgery measured the end-diastolic area (EDA) and fractional area change (%FAC). All animals were humanely killed 8 weeks after surgery and hearts were histologically assessed.
RESULTS: At 8 weeks, echocardiography revealed greater EDA values in the MI+sham group (23.6 ± 6.6 cm(2), mean ± standard deviaation) than in the MI+PEUU group (15.9 ± 2.5 cm(2)) (P < .05) and a lower %FAC in the MI+sham group (24.8 ± 7.6) than in the MI+PEUU group (35.9 ± 7.8) (P < .05). The infarcted ventricular wall was thicker in the MI+PEUU group (1.56 ± 0.5 cm) than in the MI+sham group (0.91 ± 0.24 cm) (P < .01).
CONCLUSIONS: Biodegradable elastomeric PEUU patch implantation onto the porcine heart 2 weeks post-MI attenuated left ventricular adverse remodeling and functional deterioration and was accompanied by increased neovascularization. These findings, although limited to a 2-month follow-up, may suggest an attractive clinical option to moderate post-MI cardiac failure.
Ryotaro Hashizume; Kazuro L Fujimoto; Yi Hong; Jianjun Guan; Catalin Toma; Kimimasa Tobita; William R Wagner
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Publication Detail:
Type:  Journal Article; Research Support, N.I.H., Extramural; Video-Audio Media     Date:  2012-12-06
Journal Detail:
Title:  The Journal of thoracic and cardiovascular surgery     Volume:  146     ISSN:  1097-685X     ISO Abbreviation:  J. Thorac. Cardiovasc. Surg.     Publication Date:  2013 Aug 
Date Detail:
Created Date:  2013-07-22     Completed Date:  2013-09-27     Revised Date:  2014-04-17    
Medline Journal Info:
Nlm Unique ID:  0376343     Medline TA:  J Thorac Cardiovasc Surg     Country:  United States    
Other Details:
Languages:  eng     Pagination:  391-9.e1     Citation Subset:  AIM; IM    
Copyright Information:
Copyright © 2013 The American Association for Thoracic Surgery. Published by Mosby, Inc. All rights reserved.
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MeSH Terms
Absorbable Implants*
Cardiac Surgical Procedures / instrumentation*
Disease Models, Animal
Elastic Modulus
Equipment Design
Myocardial Infarction / diagnosis,  physiopathology,  surgery*
Myocardial Reperfusion Injury / diagnosis,  physiopathology,  surgery*
Myocardium / pathology*
Neovascularization, Physiologic
Tensile Strength
Time Factors
Ventricular Dysfunction, Left / diagnosis,  physiopathology,  prevention & control
Ventricular Function, Left
Ventricular Remodeling*
Grant Support
Reg. No./Substance:
0/Elastomers; 0/Polyesters; 0/poly(ester urethane)urea

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine

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