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Balloon‐expandable intracoronary stents in the adult dog
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Balloon‐expandable intracoronary stents in the adult dog
作者:
RICHARD SCHATZ,
JULIO PALMAZ,
FERMIN TIO,
FRANCISCO GARCIA,
OSCAR GARCIA,
STEWART REUTER,
期刊:
Circulation
(OVID Available online 1987)
卷期:
Volume 76,
issue 2
页码: 450-457
ISSN:0009-7322
年代: 1987
出版商: OVID
数据来源: OVID
摘要:
We studied the acute and chronic biological reaction to balloon-expandable intracoronary stents in the adult dog. Twenty stainless steel stents were placed, by standard angioplasty techniques, into the left anterior descending, left main, or circumflex coronary arteries of 20 dogs. Angiography was performed at 1, 3, 6, and 12 months and animals were killed in groups of three at 1, 3, 8, and 32 weeks, for gross, light, and electronmicroscopic analysis. All dogs survived, all stents were patent, and there was no evidence of myocardial infarction, spasm, rupture, or aneurysm formation during follow-up (longest 18 months; average, 12 months). The stent was initially covered by a thin layer of thrombus that was replaced later by neointimal muscular proliferation that reached its maximal thickness by 8 weeks (p < .01). This neointima gradually thinned as it became more sclerotic and less cellular. The stents were covered completely by immature endothelium by 1 week without loss of side branches. We conclude that balloon-expandable intraluminal stents can be safely placed percutaneously into normal canine coronary arteries. Because of rapid endothelialization high patency rates can be expected, thus offering promise for clinical applications in man.
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