Schematic illustration of the crush technique. First, wire both vessels and perform predilation. (A) Deploy first stent to the SB with small protrusion into the MV. (B) Inflate a balloon in the MV to crush the SB stent. (C) Rewire the SB through the stent struts and perform balloon dilation. (D) Deploy second stent to the MV. (E) Rewire the SB and dilate the stent struts. (F) Perform FKBI. Finish with POT. Abbreviations: FKBI, final kissing balloon inflation; MV, main vessel; POT, proximal optimization technique; SB, side branch.