Combined use of coils and Onyx for transcatheter closure of coronary artery fistulae.

Aims: The aim of this study was to evaluate the safety and efficacy of combined endovascular coiling and Onyx embolisation in patients with a coronary artery fistula (CAF).

Methods And Results: Between September 2014 and September 2016, 26 patients with CAFs were enrolled in our study for attempted combined therapy using coils and Onyx. The mean age of patients was 64.0±9.5 years (range, 44-78 years). CAFs were large in 10 and medium in 16 patients. The mean number of coils used was 3.1±1.2 (range, two to six), and the average volume of Onyx was 0.4±0.1 ml (range, 0.2-0.6 ml). Immediate post-embolisation angiography demonstrated that complete occlusion was achieved in 23 patients (88.5%) and a small residual fistula was achieved in three patients (11.5%). Follow-up imaging (median, 11.5 months; range, nine to 20) revealed stable occlusion of CAF in 21 cases (80.8%), trivial recanalisation in four cases (15.4%), and large recanalisation in only one case (3.8%). Re-closure was performed in the patient with large recanalisation. During the follow-up period, no deaths, severe procedure-related complications, or new symptoms occurred.

Conclusions: In selected patients with CAF, transcatheter embolisation in combined therapy using coils and Onyx appears to be a valid option, providing a high success rate and low rate of recanalisation.