The left main (LM) bifurcational stenting is a complex high-risk percutaneous coronary intervention (CHIP) which is associated with various post procedural outcomes. In this study, we described current practice of left main stenting and patient outcomes in Mongolia.

We selected patients who received LM bifurcational stent. Lesion severity was evaluated by Medina classification and SYNTAX score. We examined survival rate using Kaplan-Meier estimation.

A total of 50 patients who received LM bifurcational stent were chosen (mean age 60±11, male gender 78%). Mean Syntax I score was 26.1±8.6 and mean Syntax II score was 44.7±6.2. Medina 110 type lesion was 46% (n=23), medina 111 type lesion was 36%(n=18), medina 100 type lesion was 6% (n=3), medina 011 type lesion was 4%(n=2) and medina 010 type lesion was 8% (n=4). The median degree of stenosis was 50% (IQR 30%; 90%) for LM, 90% (IQR 80%; 99%) for LAD and 0% (IQR 0%; 80%) for LCx. The final procedural success with final TIMI 3 flow was achieved in 44 patients (88%). All-cause mortality was occurred in 5 patients during follow-up and survival rate at 1 year was 72% (95% CI 66; 97) (Figure 1). Patients with final TIMI 3 flow and SYNTAX score less than 32 were had better survival rate compared with others. However, difference was not statistically significant (Figure 2 and Figure 3).

The LM bifurcational stenting is acceptable treatment choice which has good survival for high risk patients with significant LM coronary artery disease in Mongolia.