Stent implantation. (A) A 0.014-inch guidewire was advanced to cross the totally occluded site with a 1.5 mm balloon catheter back-up. (B) Pre-dilating the middle portion of the right coronary artery. (C) After deploying the first stent (2.5 × 28 mm). (D) After deploying the second stent (2.5 × 18 mm).