Intraprocedural cerebral aneurysm rupture during endovascular coiling.

Background : Intraprocedural aneurysm rupture is considered to be one of the most formidable complications of the endovascular treatment of cerebral aneurysms and is associated with high mortality. Objective : To report the clinical outcomes of cerebral aneurysms that ruptured during endovascular coiling. Patients and Methods : Over a period of six years, 559 endovascular embolizations were performed in 467 patients, with 507 cerebral aneurysms. Intraprocedural aneurysm rupture occurred in 14 cases (mean aneurysm size, 3.8 mm). Follow-up angiograms, at a minimum of three months post embolization, were available in 11 living patients. Acute and follow-up results were reviewed. Results : The difference in the rates of aneurysm perforation during endovascular coiling between ruptured and unruptured aneurysms was significant (P Conclusion : Intraprocedural aneurysm rupture frequently occurs in small aneurysms and appears to be associated with relatively high rates of mortality.