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  • Title: Role of red blood cell distribution in predicting drug-eluting stent restenosis in patients with stable angina pectoris after coronary stenting.
    Author: Zhao K, Li YJ, Gao S.
    Journal: Coron Artery Dis; 2015 May; 26(3):220-4. PubMed ID: 25647458.
    Abstract:
    BACKGROUND: It has been reported that increased red blood cell distribution width (RDW) predicts adverse events in cardiovascular disease and in patients undergoing percutaneous coronary intervention. However, the role of serum RDW levels in drug-eluting stent (DES) restenosis remains unclear. We aimed to investigate the relationship between serum RDW levels and in-stent restenosis (ISR) after coronary stenting with DES in stable angina pectoris (SAP) patients. MATERIALS AND METHODS: A total of 293 consecutive chronic SAP patients with coronary DES implantation were enrolled in this study. The ISR was analyzed by coronary angiography analysis at a mean follow-up of 8 months. According to whether ISR was detected, patients were divided into two groups: the ISR group (n=45) and the non-ISR group (n=247). Serum RDW was assessed both at admission and at the 8-month follow-up in all patients. Standard medication was continued throughout the investigation period. RESULTS: Baseline characteristics of the two groups were similar. Patients in the ISR group had significantly higher RDW levels compared with patients in the non-ISR group both at admission and at follow-up (P<0.01, respectively). Furthermore, the ISR group had significantly longer stent length and lower stent diameter compared with the non-ISR group (P<0.01, respectively). In a multivariate analysis, diabetes mellitus, current smoking, RDW levels, C-reactive protein levels, stent length, and stent diameter were associated independently with ISR. CONCLUSION: Serum RDW level may independently predict ISR at both admission and follow-up in SAP patients with coronary DES implantation, which indicates that a chronic inflammatory response might be involved in the pathogenesis of ISR.
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