Long-term angiographic recurrences after selective endovascular treatment of aneurysms with detachable coils.
OBJECTIVE
Our aim in this study was to assess the incidence and determining factors of angiographic recurrences after endovascular treatment of aneurysms.


METHODS
A retrospective analysis of all patients with selective endosaccular coil occlusion of intracranial aneurysms prospectively collected from 1992 to 2002 was performed. There were 501 aneurysms in 466 patients (mean+/-SD age, 54.20+/-12.54 years; 74% female). Aneurysms were acutely ruptured (54.1%) or unruptured (45.9%). Mean+/-SD aneurysm size was 9.67+/-5.91 mm with a 4.31+/-1.97-mm neck. The most frequent sites were basilar bifurcation (27.7%) and carotid ophthalmic (18.0%) aneurysms. Recurrences were subjectively divided into minor and major (ideally necessitating re-treatment). The most significant predictors of angiographic recurrence were determined by logistic regression. These results were confirmed by chi2, t tests, or ANOVAs followed, when appropriate, by Tukey's contrasts.


RESULTS
Short-term (< or =1 year) follow-up angiograms were available in 353 aneurysms (70.5%) and long-term (>1 year) follow-up angiograms, in 277 (55%), for a total of 383 (76.5%) followed up. Recurrences were found in 33.6% of treated aneurysms that were followed up and that appeared at a mean+/-SD time of 12.31+/-11.33 months after treatment. Major recurrences presented in 20.7% and appeared at a mean of 16.49+/-15.93 months. Three patients (0.8%) bled during a mean clinical follow-up period of 31.32+/-24.96 months. Variables determined to be significant predictors (P<0.05) of a recurrence included aneurysm size > or =10 mm, treatment during the acute phase of rupture, incomplete initial occlusions, and duration of follow-up.


CONCLUSIONS
Long-term monitoring of patients treated by endosaccular coiling is mandatory.
Raymond
Jean
J
Department of Radiology, Centre Hospitalier de l'Université de Montréal, Notre-Dame Hospital, 1560 Sherbrooke East, Room M-8203-1, Montreal, Quebec, H2L 4M1, Canada. dr_jean_raymond@hotmail.com
Guilbert
François
F
Weill
Alain
A
Georganos
Stavros A
SA
Juravsky
Louis
L
Lambert
Anick
A
Lamoureux
Julie
J
Chagnon
Miguel
M
Roy
Daniel
D
D002533:Cerebral Angiography; D004621:Embolization, Therapeutic / Q000009:adverse effects; D005260:Female; D005500:Follow-Up Studies; D006801:Humans; D002532:Intracranial Aneurysm / Q000175:diagnosis* / Q000628:therapy*; D016015:Logistic Models; D008297:Male; D008875:Middle Aged; D012008:Recurrence; D012189:Retrospective Studies; D012307:Risk Factors; D013995:Time; D017211:Treatment Failure; D014656:Vascular Surgical Procedures / Q000009:adverse effects