Direct Microscopic Observation of Striations in a Fractured Section of a Sirolimus-Eluting Stent (Cypher Bx Velocity®) Indicates Induction of Stent Fracture by Continuous Shear Stress
スポンサーリンク
概要
- 論文の詳細を見る
A 73-year-old woman with severe congestive heart failure was treated by implantation with a sirolimus-eluting stent (SES; Cypher Bx Velocity®) in the left main coronary artery (LMCA) using the staged T-stent, kissing balloon, and hugging balloon techniques. Follow-up coronary multislice computed tomography after 10 months revealed that SES was completely fractured in 2 directions; the fractured stent appeared in the shape of the letter “L” and had migrated into the aorta. An SES fragment was surgically removed and subsequent electron microscopy revealed striations (striped patterns in fractured sections) on the fracture plane, indicating continuous shear stress after SES implantation in the LMCA. This case provides direct evidence of continuous shear stress on the SES and indicates the necessity of improving the structure of the stent such that it can withstand shear stress.
著者
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Suzuki Teruhiko
Department Of Cardiology Saitama Prefecture Cardiovascular And Respiratory Center
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Kashiwagi Yusuke
Department Of Cardiology Hokkaido Cardiovascular Hospital
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Mutoh Makoto
Department Of Cardiology Saitama Prefecture Cardiovascular And Respiratory Center
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Endo Akira
Department Of Agricultural And Biological Chemistry Tokyo Noko University
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Ishikawa Tetsuya
Department Of Applied Chemistry Faculty Of Science Science University Of Tokyo
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Suzuki Teruhiko
Department of Cardiology, Saitama Prefecture Cardiovascular Respiratory Center
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Kashiwagi Yusuke
Department of Cardiology, Saitama Prefecture Cardiovascular Respiratory Center
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Mutoh Makoto
Department of Cardiology, Saitama Prefecture Cardiovascular Respiratory Center
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