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 Conclusion: Stent deformation induced by KBT for complex bifurcation lesions was not associated with adverse mid-term outcomes.