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Int J Cardiol. 2009 Jan 9;131(2):212-6. doi: 10.1016/j.ijcard.2007.10.059. Epub 2008 Feb 1.

Clinical characteristics of stent fracture after sirolimus-eluting stent implantation.

Author information

1
Department of Medicine, Division of Cardiology, Inje University, Paik Hospital, Busan, Republic of Korea.

Abstract

BACKGROUND:

Despite several case reports of sirolimus-eluting stent (SES) fracture and concern regarding restenosis after successful SES implantation, the clinical characteristics of this problem are not well known.

METHODS:

Clinical records and angiographic films of patients who received follow-up coronary angiography between February 2005 and October 2006 were retrospectively analyzed.

RESULTS:

Among the 686 SES implanted in 479 patients, 27 fractures were found in 22 (3.2%) stents in 18 patients. All stent fractures occurred in long stented segments, i.e. >/=28 mm (range, 28 mm to 83 mm). Of the 22 fractured stents, sixteen (72.7%) were identified in the right coronary artery (RCA) and fifteen (68.2%) were found to have a fracture site within 10 mm from areas with increased rigidity due to metal overlap. The significant multivariate predictors of stent fracture were the stented length (Odds ratio 1.06; 95% confidence interval 1.04-1.09; p=0.001) and the RCA location (Odds ratio 4.44; 95% confidence interval 1.66-11.86; p=0.003). The binary restenosis rate was 22.7% and target lesion revascularization was performed in two (9.1%) fractured stents.

CONCLUSIONS:

SES fracture was associated with a long stented segment, RCA location and metal overlap. Stent fracture may be another potential risk factor for restenosis after successful SES implantation.

PMID:
18241940
DOI:
10.1016/j.ijcard.2007.10.059
[Indexed for MEDLINE]

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