Abstract 2568: The Relationship and Optimal Threshold of Stent Length to the Risk of Stent Thrombosis After Drug-Eluting Stent Implantation
Background: Despite the recommendation of the full lesion coverage in the drug-eluting stent (DES) era, the length of stented segment have been a traditional risk factor of stent thrombosis (ST).
Methods: Consecutive 3,145 patients (4,667 lesions) who underwent DES from Feb, 2003 to Feb, 2006 were investigated. Using the logistic regression analysis and a receiver-operating characteristic (ROC) curve, we evaluated the association between ST and stent length, and the cut-off value for the selection of the optimal stent length.
Results: Mean stented number per lesion was 1.4 ± 0.6 and mean stented length per lesion was 34.2 ± 18.9 mm. During long-term follow up (29 ± 10 months), 68 patients (2.2%) developed ST. We found a significant relation between the rate of ST and the stented length (Y=-4.563 + 0.050 X; odd ratio 1.1; 95% CI for beta 1.01–1.20; R=0.71; p<0.01). The optimal cut-off value of stent length was 51.5 mm (p<0.001) (specificity, 84% and sensitivity, 38%).
Conclusions: The risk of ST after DES was significantly associated with the length of stented segment with the best discriminating value of 51.5mm.