Abstract 17733: Impact of Stent Deformation Induced by Kissing Balloon Technique for Coronary Bifurcation Lesions on Clinical Outcomes
Background: Final kissing balloon technique (KBT) for coronary bifurcation lesions induces proximal stent deformation. The aim of this study was to investigate the impact of second-generation drug-eluting stent deformation evaluating by intravascular ultrasound imaging on clinical outcomes.
Methods: From February 2010 to April 2015, 377 consecutive bifurcation lesions treated with second-generation drug-eluting stents were divided into two groups according to KBT, KBT group (n = 176) and no-KBT group (n = 201). Based on intravascular ultrasound analysis, the stent symmetry index (minimum / maximum stent diameter) and the stent overstretch index (the mean of minimum and maximum stent diameter / the mean of minimum and maximum reference diameter) were calculated.
Results: ACC/AHA type B2/C lesion was significantly greater in the KBT group compared with the no-KBT group (84% vs. 68%; p = 0.0004). The stent symmetry index was significantly lower (0.75 ± 0.07 vs. 0.87 ± 0.06; p < 0.0001) and the stent overstretch index was significantly higher in the KBT group compared with the no-KBT group (1.03 ± 0.08 vs. 1.01 ± 0.06; p < 0.0001). The incidence of target lesion revascularization was significantly greater in the KBT group compared with the no-KBT group (8.5% vs. 2.5%; p = 0.009). However the independent predictors of target lesion revascularization were not the stent deformation indices but right coronary artery bifurcation (hazard ratio: 5.73, 95% confidence interval: 1.98 to 16.6; p = 0.001), and 2-stent technique (hazard ratio: 4.21, 95% confidence interval: 1.32 to 13.5; p = 0.01).
Conclusion: Stent deformation induced by KBT for complex bifurcation lesions was not associated with adverse mid-term outcomes.
Author Disclosures: T. Gamou: None. Y. Yakuta: None. C. Fujita: None. D. Tsujimoto: None. R. Kimura: None. H. Terai: None. Y. Horita: None. M. Ikeda: None. M. Namura: None.
- © 2016 by American Heart Association, Inc.