Arterial Remodeling After Bioresorbable Scaffolds and Metallic Stents

作者：Serruys Patrick W^*; Katagiri Yuki; Sotomi Yohei; Zeng Yaping; Chevalier Bernard; van der Schaaf Rene J; Baumbach Andreas; Smits Pieter; van Mieghem Nicolas M; Bartorelli Antonio; Barragan Paul; Gershlick Anthony; Kornowski Ran; Macaya Carlos; Ormiston John; Hill Jonathan; Lang Irene M; Egred Mohaned; Fajadet Jean; Lesiak Maciej; Windecker Stephan; Byrne Robert A; Raber Lorenz; van Geuns Robert Jan; Mintz Gary S; Onuma Yoshinobu

来源：Journal of the American College of Cardiology, 2017, 70(1): 60-74.

DOI：10.1016/j.jacc.2017.05.028

• coronary artery disease
• expansion index
• intravascular ultrasound
• lumen area
• plaque area
• vessel area

BACKGROUND Although previous observational studies have documented late luminal enlargement and expansive remodeling following implantation of a bioresorbable vascular scaffold (BVS), no comparison with metallic stents has been conducted in a randomized fashion.
OBJECTIVES This study sought to compare vessel remodeling patterns after either Absorb BVS or Xience metallic drug-eluting stent (DES) implantation (Abbott Vascular, Santa Clara, California) and determine the independent predictors of remodeling.
METHODS In the ABSORB II randomized trial, 383 lesions (n = 359) were investigated by intravenous ultrasound both post-procedure and at 3-year follow-up. According to vessel and lumen area changes over 3 years, we categorized 9 patterns of vessel remodeling that were beyond the reproducibility of lumen and vessel area measurements.
RESULTS The relative change in mean vessel area was significantly greater with the BVS compared to the DES (6.7 +/- 12.6% vs. 2.9 +/- 11.5%; p = 0.003); the relative change in mean lumen area was significantly different between the 2 arms (1.4 +/- 19.1% vs. +/- 1.9 +/- 10.5%, respectively; p = 0.031). Multivariate analysis indicated that use of the BVS, female sex, balloon-artery ratio > 1.25, expansion index >= 0.8, previous percutaneous coronary intervention, and higher level of low-density lipoprotein cholesterol were independent predictors of expansive remodeling. Furthermore, in the BVS arm, necrotic core pre-procedure was an independent determinant of expansive remodeling.
CONCLUSIONS Expansive vessel wall remodeling was more frequent and intense with the BVS than the metallic DES and could be determined by patient baseline characteristics and periprocedural factors. The clinical effect of the observed lumen and vessel remodeling must be investigated in further large clinical studies to optimize the clinical outcome of patients and lesions treated by bioresorbable scaffolds.

• 出版日期2017-7-4