Regarding the complications linked to this procedure, the trials completed at our Institution, showed morbidity and mortality rates about of 35% and 0%, consistent with the data presented by recent review (12 - 52% and 0,9-5,8% respectively), which are however more heterogeneous due to differences between the considered studies. In addition, the analysis divided into two blocks per year of execution of the procedure, has demonstrated a significant reduction in the percentage of complications (up to 26.7%) with a statistically significant difference.