A previous study (ORBID) of 30 patients was done at Mount Sinai Hospital and aimed to identify the predictors of side branch (SB) ostial stenosis developed after provisional stenting of the main vessel (MV) using Optical Coherence Tomography (OCT). The study Showed that High lipid content of the MV lesion and a contralateral location of lipid in the bifurcation area may contribute to SBOS after provisional stenting.