ISHIDA Issei    Department   School of Medicine(Tokyo Women's Medical University Hospital), School of Medicine    Position   Assistant Professor
Language	English
Title	The Effects of Predilation with Scoring Balloon Compared to Conventional Balloon on Cobaltchromium Stent Expansion Analyzed with Optical Coherent Tomography
Conference	The 79th Annual Scientific Meeting of the Japanese Circulation Society
Promoters	Japanese Circulation Society
Conference Type	Nationwide Conferences
Presentation Type	Poster notice
Lecture Type	General
Publisher and common publisher	◎JUJO Kentaro, KIM Ahsung, ISHIDA Issei, SUZUKI Yuki, SAITO Katsumi, HAGIWARA Nobuhisa
Date	2015/04/25
Venue (city and name of the country)	Osaka, JAPAN
Summary	Background: Stent expansion remains one of important predictors of restenosis and subacute thrombosis, even in use of drug-eluting stent. In addition, the bioresorbable vascular scaffold requires sufficient lesion preparation for their appropriate apposition.Methods and Results: Sixty-six consecutive de novo lesions were enrolled, and finally 52 non-calcified lesions treated with Cobalt-chromium Everolimus-eluting stent under optical coherent tomography (OCT) guidance without post-stenting dilation. Enrolled lesions randomly assigned to be performed single predilation either with semi-compliant scoring or conventional balloon. Stent expansion was defined as the ratio of OCT-measured minimum/predicted stent area. This ratio was significantly larger in scoring group (71 vs. 61%, p=0.017), and greater percentages of stents had final minimum stent areas >5.0 mm2 (27 vs. 4%, p=0.021). Larger degrees of dissection-angle after balloon dilation was significantly more prevalent in scoring group (p=0.030), and degrees of dissection positively associated with stent expansion in lesion with >90 degree dissection (r2=0.28, p=0.044). Quantitative coronary angiography (QCA) revealed similar expansion at stent deployment (80 vs. 75 %, p=0.10) followed with significantly larger minimum stent diameter in scoring group on final angiography (2.43 vs. 2.27 mm, p=0.049), suggesting that lesion modification by scoring device may avoid acute stent recoil even in non-calcified lesions.Conclusion: In this randomized study, pretreatment with scoring balloon enhanced stent expansion and minimized the difference between predicted and achieved stent dimension.