OBJECTIVES: Authors evaluate the impact of intraprocedural complications on successful technical realisation and long-term clinical outcome of the uterine fi broid embolisation. BACKGROUND: The uterine artery embolisation (UAE) has become an accepted treatment method for uterine fi broids. In general, the unilateral embolisation is considered to be insuffi cient due to poor clinical effect. METHODS: Overall, 165 uterine artery embolisations were analysed (retrospectively-prospectively) in 163 female patients. Intraprocedural complications and their impact on the possibility to perform bilateral embolisationwere evaluated. In patients with unscheduled unilateral embolisation, short-term as well as longterm clinical effects were observed with mean follow-up period of 41 months. RESULTS: The bilateral uterine artery embolisation was possible in 95.7 % (95 %, CI 91.3-99.4 %) procedures. The unilateral embolisation was reported in 7 procedures (4.3 %, CI 1.2-8.3 %) and reasons were following: resistant arterial spasm in 4 patients (2.5 %, CI 0.7 %-5.3 %) and impossible catheterisation due to unfavourable anatomic situation in 3 patients (1.8 %, CI 0.3-4.1 %). Other complications, such as dissection and perforation, did not affect the successful technical realisation. The long-term clinical effect of unscheduled unilateral embolisation was reported in 5 patients. CONCLUSION: The results of our series of unscheduled unilateral uterine fi broid embolisation had high longterm clinical success rate. In way of unscheduled unilateral embolisation, we recommend MRI follow-up and reintervention only in way of persistence or recurrence of symptoms with concurrent MRI fi nding of residual fi broids(Tab.