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. 2021 May 7;21:232. doi: 10.1186/s12872-021-02028-z

Fig. 4.

Fig. 4

Representative images of one patient. a Bifurcation lesion of left anterior descending artery (LAD) and first diagonal branch (D1). b First kissing inflation of the stent balloon (12 atm) and balloon (6 atm); c Second kissing inflation of D1 balloon (6 atm) and a noncompliant 3.5 * 15 mm balloon at the bifurcation core (20 atm); d Proximal optimization technique; e Final coronary angiogram and its complete stent apposition and good stent symmetry in both distal (g) and proximal (h) stent segments