Abstract
Background: Recently, drug-eluting stents have been widely adopted rather than bare-metal stents in patients on chronic hemodialysis (HD) based on the extrapolation of data from patients on non-HD. However, whether DES implantation is associated with a reduced rate of in-stent restenosis (ISR) is unclear. We investigated the incidence of ISR and its predictors in patients on HD after drug-eluting stent implantation.Methods and Results: We analyzed 194 consecutive patients (331 lesions) on HD who underwent follow-up angiography after drug-eluting stent implantation. ISR was observed in 74 lesions (22.4%). Angiographically, the relative incidence of AHA/ACC type C lesion was increased (47% vs. 32%; P=0.043), the minimal lumen diameter (MLD) before DES implantation was smaller (0.82±0.49 vs. 0.97±0.45mm; P<0.01) and the lesion length (LL) was increased (30.2±16.1 vs. 24.4±12.1mm; P=0.023) in lesions with ISR compared to those without ISR. The rate of rotational atherectomy use was also increased in lesions with ISR compared to those without ISR (50% vs. 25%; P<0.01). In a multivariate analysis, the MLD before drug-eluting stent implantation (odds ratio [OR] =0.50, 95% confidence interval [CI] 0.27-0.91, P=0.024), LL (OR=1.02, 95% CI 1.00-1.04, P=0.030) and the use of rotational atherectomy (OR=2.71, 95% CI 1.55-4.72, P<0.01) were independent predictors of ISR. The incidence of ISR was similar between lesions treated with the first-generation (25.8%) and the second-generation DESs (20.4%).Conclusion: ISR was observed in 74 lesions (22.4%). A small MLD, long LL and the use of rotational atherectomy were independent predictors of ISR after drug-eluting stent implantation in patients on HD. There was no significant difference in ISR rate between the first- and the second-generation drug-eluting stents.
Impact of different coronary angioscopic findings on arterial healing one year after bioresorbable-polymer and second-generation durable-polymer drug-eluting stent implantation
