Utility of coronary orbital atherectomy with guide‐extension system for distally located undilatable in‐stent restenosis: A case report

Abstract

Abstract Orbital atherectomy (OA) may be effective in managing undilatable in‐stent restenosis (ISR) despite off‐label indications. We demonstrated that optical frequency domain imaging (OFDI)‐guided OA, with a guide‐extension system was effective even in distally located, undilatable ISR. However, OFDI revealed that inter‐struts calcified neoatherosclerosis remained a challenging issue.

Keywords

• calcified neoatherosclerosis
• guide‐extension catheter
• in‐stent restenosis
• optical frequency domain imaging
• orbital atherectomy