[Angiographic outcomes of cerebral aneurysms embolized with Matrix coils]

To investigate the effect of Matrix coil in prevention of recanalization of intracranial aneurysm after embolization with Matrix coils.

Plan of follow-up was designed to make digital subtraction angiographies for Forty-eight intracranial aneurysm patients with 49 aneurysm s, 22 males and 26 females, aged 52 (15 ~ 67), underwent embolization with Matrix coil and were followed up for 11.75 months on average. Digital subtraction angiography was conducted immediately after the operation and during the follow-up. At least three projections, including anterior-posterior projection, lateral projection, and optimal working projection were adopted. The percentages of occlusion of the initial and the follow-up images were compared.

DSA immediately after the operation showed a complete occlusion rate of 34.7%, near complete rate of 42.9% and an incomplete rate of 22.4%. The follow-up DSA revealed that the complete occlusion rate was 53.1%, near complete rate was 24.5%, and incomplete rate was 22.4%. The overall recanalization rate was 28.5%, 22.2% for small aneurysms and 46.1% for large aneurysms. The major recanalization rate was 14.3% and the improvement rate was 24.5%. The recanalization rate was 11.8% for total occlusion, 33.3% for near complete occlusion, and 45.5% for incomplete.

The long-term angiographic outcome of intracranial aneurysms after embolization with Matrix coils is stable. The recanalization rate is acceptable and is not better than that of GDCs.