Elsevier

American Heart Journal

Volume 175, May 2016, Pages 47-55
American Heart Journal

Clinical Investigation
Ten-year clinical outcomes after sirolimus-eluting stent implantation: Impact of an in-stent restenosis target lesion

https://doi.org/10.1016/j.ahj.2016.02.005Get rights and content

Background

Little is known about the long-term outcomes after first-generation sirolimus-eluting stent (SES) implantation. We aimed to investigate the clinical outcomes up to 10 years after SES implantation.

Methods

The study population comprised 342 patients (504 lesions) who underwent SES implantation between January 2002 and December 2004. The median duration of follow-up was 3816 days (interquartile range [Q1-Q3], 3,705-3,883 days).

Results

The cumulative event rate of definite stent thrombosis was 3.9%. The cumulative rate of target lesion revascularization (TLR) at 1, 5, and 10 years was 8.7%, 18.8%, and 31.1%, respectively, and the annual rate of TLR was 3.1%. Clinically driven TLR occurred at relatively constant rate during 10 years (2.0% per year). In a multivariate analysis, higher body mass index, hemodialysis, in-stent restenosis (ISR) target lesion, and total stent length >30 mm were independent risk factors of TLR within 5 years. An independent risk factor of TLR beyond 5 years was ISR target lesion.

Conclusions

Late TLR after SES implantation is a long-term hazard, lasting up to 10 years. The ISR target lesion is a risk factor of TLR during 10 years.

Section snippets

Patient population

This study was designed as a retrospective, single-arm, single-center registry to evaluate clinical outcomes after the implantation of SES (Cypher, Cordis, Johnson & Johnson, Miami, FL). From January 2002 to December 2004, 395 consecutive patients (568 lesions) who underwent the first SES implantation were enrolled in this study. Of these, we excluded 53 patients (64 lesion) treated with SES and other type of stent. Finally, we analyzed 342 patients (504 lesions) treated exclusively with SES.

Baseline characteristics

The study population included 12.6% patients of advanced age (>80 years) and 45.3% patients with diabetes mellitus (DM). Furthermore, the proportions of in-stent restenosis (ISR) target lesion and chronic total occlusion were 36.0% and 14.0%, respectively (Table I). All the stents that previously implanted were BMSs.

Clinical outcomes of 10-year follow-up

The cumulative event rate of all-cause death and cardiac death was 42.1% and 18.4%, respectively (Table II and Figure 1). The annual rate of all-cause death and cardiac death

Discussion

In the present study, we analyzed the long-term clinical outcomes after the first SES implantation. The main findings of this analysis are as follows: (1) TLR after SES implantation occurred at a relatively constant rate up to 10 years, and (2) SES implantation for ISR target lesions was a risk factor of TLR through 10 years.

Several long-term follow-up studies up to 5 years after SES implantation have demonstrated the benefit of DESs and low rates of TLR.12, 13 However, the clinical and lesion

Conclusions

Late TLR after SES implantation is a continuous hazard, lasting up to 10 years. In-stent restenosis target lesion is an independent risk factor of TLR through 10 years.

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