Risk factor analysis of changes in blood flow in the A1 segment of the anterior cerebral artery after FD coverage of it

AbstractBackgroundFew studies have explored the effect of flow diverter device (FD) on blood flow in A1 segment of the anterior cerebral artery (ACA), after treatment of intracranial aneurysms in the bifurcation region of the internal carotid artery (ICA). The main objective of this article is to investigate the factors that affecting A1 blood flow after FD cover the A1 artery.Materials and MethodThis is a single-center, retrospective study. Data were collected retrospectively from our center, patients whose FDs were placed for treatment from the terminal of the ICA to the M1 segment were analyzed.ResultsA total of 42 patients were included in the study. Immediate post-procedural angiography following device placement revealed decreased blood flow in the A1 of 15 (35.7%) patients and complete occlusion of the A1 segment in 11 (26.2%) patients. During an average follow-up period of 9.8 months, the A1 segment was ultimately occluded in 25 patients (59.5%), decreased blood flow in 4 patients (9.5%).ConclusionWhen using FD to cover the A1 artery for the treatment of intracranial aneurysms, patients with preoperative opening of the anterior communicating artery (AcomA) are more prone to occlusion or decreased blood flow of the A1 artery, compared to patients without opening.