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  • Title: Long-term efficacy and safety of Chinese made sirolimus eluting stents: results, including off label usage, from two centres over three years.
    Author: Zhang Q, Xu B, Yang YJ, Qiao SB, Zhang RY, Zhang JS, Hu J, Qin XW, Chen JL, Shen WF, Gao RL.
    Journal: Chin Med J (Engl); 2008 Sep 05; 121(17):1670-4. PubMed ID: 19024097.
    Abstract:
    BACKGROUND: Multiple randomized clinical trials have demonstrated that drug eluting stents can significantly reduce the rates of restenosis and subsequent adverse events across lesion and patient. We investigated the medium term clinical efficacy and safety of Firebird sirolimus eluting stent (SES) in coronary artery disease. METHODS: The sample was 509 consecutive patients with coronary artery disease (CAD) who were treated by Firebird SES and finished three-year clinical follow-up. The occurrences of major adverse cardiac events (MACE) and Academic Research Consortium defined stent thrombosis (ST) were evaluated in patients with and without diabetes mellitus. RESULTS: Three hundred and thirty three patients (65.4%) were treated by Firebird SES by off label indications. Angiographic success was achieved in 98.3% of the lesions. MACE and target vessel revascularization rates at 6-month, 1 year's and 3 years' clinical follow-up were 2.4% and 1.4%, 4.1% and 2.8%, 7.9% and 5.1%, respectively. The cumulative 3-year MACE free survival rate was 92.1%. After 3 years, DM patients had significantly higher rates of MACE (13.7% vs 6.4%, P < 0.05) and TVR (9.8% vs 4.0%, P < 0.05) and the cumulative MACE free survival rate was very significantly lower in the DM group (86.4% vs 93.6%, P < 0.05). ST occurred in 7 patients (1.4%) at the end of 3 years' follow-up, 5 of them had definite ST with 4 cases presenting with myocardial reinfarction and 1 with unstable angina, the other 2 with probable ST had reinfarction in the stented coronary territory without angiographic follow-up. There was no difference in occurrence of ST between off label (1.5%) and on label groups (1.1%, P = 0.07). CONCLUSIONS: In daily practice, about 2/3 of patients were treated by Firebird SES by off label indications. Medium term clinical follow-up of 3 years indicated CAD patients treated by Firebird SES had a low MACE and acceptable ST rate. DM patients had higher rates of adverse events and than non DM.
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