548 drug-eluting stent (des) in-stent restenosis (isr) lesions were exclusively treated with pcb angioplasty for the first time between september 2008 and december 2016.Medtronic zotarolimus and resolute zotarolimus-eluting stents were among the des that exhibited restenosis.Lesions treated included the left main, lad, left circumflex and right.This study investigated the association between oct findings and mid-term angiographic outcomes.The main findings of the study were: the heterogeneous pattern was associated with recurrent restenosis at follow-up; smaller post-procedural mla, caused primarily by persistent stent under expansion, was also a main cause of recurrent restenosis; and previous stent fracture, heterogeneous pattern, and stent under expansion were independent risk factors for recurrent restenosis.
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