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Safety and efficacy of bioabsorbable magnesium alloy stents in porcine coronary arteries
Author(s) -
Waksman Ron,
Pakala Rajbabu,
Kuchulakanti Pramod K.,
Baffour Richard,
Hellinga David,
Seabron Rufus,
Tio Fermin O.,
Wittchow Eric,
Hartwig Sonja,
Harder Claus,
Rohde Roland,
Heublein Bernd,
Andreae Arnim,
Waldmann KarlHeinz,
Haverich Axel
Publication year - 2006
Publication title -
catheterization and cardiovascular interventions
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.988
H-Index - 116
eISSN - 1522-726X
pISSN - 1522-1946
DOI - 10.1002/ccd.20727
Subject(s) - medicine , neointima , coronary arteries , stent , lumen (anatomy) , restenosis , neointimal hyperplasia , stenosis , coronary stent , cardiology , surgery , artery
Objective : We aimed to determine the safety and efficacy of biobasorbable magnesium alloy stents in porcine coronary arteries. Bioabsorbable magnesium stents carry the potential to overcome the limitations posed by permanent metallic stents such as chronic inflammation, late stent thrombosis, prolonged antiplatelet therapy, and artifacts when imaged by multislice‐computed tomography or magnetic resonance imaging. Methods : Magnesium alloy stents or stainless steel stents were randomly deployed in coronary arteries of domestic or minipigs. Domestic pigs were sacrificed at 3 days ( n = 2) or 28 days, and minipigs at 3 months. Results : At 3 days, magnesium alloy stents were intact, but started to show signs of degradation by 28 days. There was no evidence of stent particle embolization, thrombosis, excess inflammation, or fibrin deposition. At 28 days and 3 months, neointimal area was significantly less in magnesium alloy stent segments (2.44 ± 0.88 mm 2 and 1.16 ± 0.19 mm 2 ) as compared with the stainless steel stent segments (5.03 ± 1.5 mm 2 and 1.72 ± 0.68 mm 2 , P < 0.001 and 0.02). Quantitative coronary analysis indicates that percentage area stenosis and percentage diameter stenosis in magnesium alloy stent segments improved significantly at 3 months as compared to 28 days. Despite decreased neointimal hyperplasia, lumen area of the magnesium alloy stented vessels did not improve significantly. Conclusion : Magnesium alloy stents are safe and are associated with less neointima formation; however, reduced neointima did not result in larger lumen. © 2006 Wiley‐Liss., Inc.