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POT-side-POT (re-POT) (A) MV stent is under-expanded after SB ballooning. (B) Correct positioning of a post-dilating balloon, aligning the proximal edge of distal balloon marker with the tip of stent carina. (C) Post-dilation. (D) MV stent is expanded after post-dilation.
MV = main vessel; POT = proximal optimization technique; SB = side branch.
