Sirolimus‐eluting BiOSS LIM dedicated bifurcation stent in the treatment of unprotected distal left main stenosis

Background Proximal optimization technique (POT) has been proposed to adapt the conventional drug‐eluting stent (DES) with the fractal anatomy of the bifurcation. However, only few DES are labeled for post‐expansion beyond 5.0 mm. Furthermore, recrossing in the side branch (SB) through the main vessel (MV) stent cells may be challenging. Objectives To compare the sirolimus‐eluting, balloon‐expandable dedicated bifurcation stent BiOSS LIM DES versus the second generation DES in the treatment of distal unprotected left main coronary arteries (ULMCAs) lesions. Methods Forty‐two consecutive patients with distal ULMCA lesions were treated with the BiOSS LIM (BiOSS LIM group) in our center. A matched‐group of patients treated with second‐generation DES was selected from our database (Control group). The primary endpoint was the procedural complication rate, including (a) SB occlusion, defined as intraprocedural TIMI flow grade