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This study aims to evaluate the safety and effectiveness of the bare stents (BMS) and drug eluting stents (DES) for treatment of the saphenous vein graft stenosis (SVG), and to determine the predictive factors for long term clinical outcomes.
The patients who underwent stenting for SVG stenosis for between 2009 and 2011 were included. The long-term results of 73 patients with SVG lesions to whom revascularization was applied using BMS or DES were examined retrospectively and their findings were compared. In statistical analysis, the Mann-Whitney-U test was used, and for the independent living curve from MACE, Kaplan-Meier Survival Analysis was used.
When the long-term results of BMS (n:49) and DES groups (n:24) were compared (average follow-up time for both groups: 671±343 days), no significant differences were found among the target lesion revascularization rate (TLR), target vessel revascularization rate (TVR), and mortality rates between the BMS and DES stent groups (P> 0.05). In Kaplan-Meier Survival Analysis, in survival curves independent from MACE, no significant difference was found between BMS and DES stent groups in terms of follow-up period (p> 0.05).
It appears that there is no significant differences between DES and BMS in long-term follow-up and there was no long-term predictive factor for NLR.