Fig. 3

After the stent was released, StentBoost imaging was used to confirm the position of the stent at the opening of the anterior descending branch. Subfigures illustrate the steps of the StentBoost protocol. a The balloon was used as reference mark after the stent was released. b The proximal mark of the posterior balloon was located at the opening of the anterior descending branch. Angiography showed that the guidewire of the circumflex branch was close to the side of the anterior descending branch of the circumflex branch. c The proximal end of the stent covers the opening of the anterior descending branch and ends at the edge of the circumflex branch with reference to the guidewire of the circumflex branch