The Effect of A1 Segment Dominance on Angular Morphology of the Anterior Communicating Artery Bifurcation in Healthy and Aneurysmal Patients

ACOM angular morphology is strongly determined by A1 dominance, independent of aneurysm presence. Unlike the AcomA2 angle, A1A2 was measurable in all samples and reliably captured bifurcation angulation. ACOM bifurcations, unlike other bifurcations, require bilateral morphological and hemodynamic evaluation of the full ACOM complex. These findings inform future evaluation and modeling of cerebral vascular architecture.