Premium
Incidence and clinical impact of coronary stent fracture after sirolimus‐eluting stent implantation
Author(s) -
Aoki Jiro,
Nakazawa Gaku,
Tanabe Kengo,
Hoye Angela,
Yamamoto Hirosada,
Nakayama Tomohiro,
Onuma Yoshinobu,
Higashikuni Yasutomi,
Otsuki Syuji,
Yagishita Atsuhiko,
Yachi Sen,
Nakajima Hiroyoshi,
Hara Kazuhiro
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.20950
Subject(s) - medicine , stent , restenosis , odds ratio , confidence interval , surgery , cardiology , radiology
Background : Stent fracture is one of the possible causes of restenosis after sirolimus‐eluting stents (SES) implantation. The aim of our study was to evaluate the prevalence and clinical impact of coronary stent fracture after SES implantation. Methods : From our prospective institutional database, 280 patients were treated solely with SES from August 2004 to June 2005. Among the 280 patients, 256 patients with a total of 307 lesions underwent follow‐up angiography on an average of 240 days after the procedure. Results : Stent fractures were observed in eight (2.6%) lesions. Of the eight lesions with stent fracture, five were located in the right coronary artery (RCA), two in the saphenous vein (SV) graft, and one in the left anterior descending coronary artery. The stent fractures were all in the locations that served as hinges during vessel movement in the cardiac contraction cycle. Seven of the eight stent fractures were adjacent to the edge of previously implanted or overlapped stent. Significant multivariate predictors of stent fracture were SV graft location (Odds ratio 35.88; 95% confidence interval 2.73–471.6, P = 0.006), implanted stent length (Odds ratio 1.04; 95% confidence interval 1.01–1.07, P = 0.02), and RCA location (Odds ratio 10.00; 95% confidence interval 1.11–89.67, P = 0.04). In‐stent binary restenosis rate was 37.5% and target lesion repeat revascularization rate was 50.0% in patients with stent fracture. Conclusions : Stent fracture was likely to be affected by mechanical stress provoked by rigid structures and hinge points. Stent fracture might be associated with the high incidence of target lesion revascularization. © 2006 Wiley‐Liss, Inc.