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Journal of Interventional Cardiology
Volume 2019, Article ID 6515129, 9 pages
https://doi.org/10.1155/2019/6515129
Research Article

Treatment of In-Stent Restenosis by Excimer Laser Coronary Atherectomy and Drug-Coated Balloon: Serial Assessment with Optical Coherence Tomography

1Department of Cardiovascular Medicine, Ome Municipal General Hospital, Tokyo, Japan
2Department of Cardiology, Musashino Red Cross Hospital, Tokyo, Japan
3Department of Cardiovascular Medicine, National Disaster Medical Center, Tokyo, Japan
4Department of Cardiovascular Medicine, Tokyo Medical and Dental University, Tokyo, Japan

Correspondence should be addressed to Toru Miyazaki; pj.ca.dmt@mvcmrot

Received 14 January 2019; Revised 20 March 2019; Accepted 2 April 2019; Published 18 April 2019

Academic Editor: Viktor Kočka

Copyright © 2019 Toru Miyazaki et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

Objectives. We aimed to compare the results of neointimal modification before drug-coated balloon (DCB) treatment with excimer laser coronary atherectomy (ELCA) plus scoring balloon predilation versus scoring balloon alone in patients presenting with in-stent restenosis (ISR). Background. Treatment of ISR with ELCA typically results in superior acute gain by neointima debulking. However, the efficacy of combination therapy of ELCA and DCB remains unknown. Methods. A total of 42 patients (44 ISR lesions) undergoing DCB treatment with ELCA plus scoring balloon (ELCA group, n = 18) or scoring balloon alone (non-ELCA group, n = 24) were evaluated via serial assessment by optical coherence tomography (OCT) performed before, after intervention, and at 6 months. Results. Although there was significantly greater frequency of diffuse restenosis and percent diameter stenosis (%DS) after intervention in the ELCA group, comparable result was shown in %DS, late lumen loss, and binary angiographic restenosis at follow-up. On OCT analysis, a decreased tendency in the minimum lumen area and a significant decrease in the minimum stent area were observed in the ELCA group between 6-month follow-up and after intervention (-0.89 ± 1.36 mm2 vs. -0.09 ± 1.25 mm2, p = 0.05, -0.49 ± 1.48 mm2 vs. 0.28 ± 0.78 mm2, p = 0.03, respectively). The changes in the neointimal area were similar between the groups, and target lesion revascularization showed comparable rates at 1 year (11.1% vs. 11.4%, p = 0.85). Conclusions. Despite greater %DS after intervention, ELCA before DCB had possible benefit for late angiographic and clinical outcome.