Reinvestigation on Artery Model Liable to Anterior Communicating Artery Aneurysm Formation

Objective To investigate artery model liable to anterior communicating artery aneurysm formation. Materials and Methods 1081 normal magnetic resonance angiography(MRA) image in two years were defined shape of cerebral in general crowds. 49 anterior communicating aneurysms patient's type of cerebral vessels were analysed compared to general crowds to investigate artery model liable to anterior communicating artery aneurysm formation. Results Of all the anterior communicating aneurysms,one-sided A1 segment dominant was found in 87.76%(45/49). Compared to incidence in general crowds(11.19%),it had significant difference(χ 2=151.84,P 0.0001).Left A1 segment dominant (33/49)was triple of right dominant(12/49) approximately (63.27%/24.49%),compared to composition of general crowd(11.19%/3.98%)has not statistically significant(χ 2=0.0497,P =0.8235).The angle of two-side A2 segment of one-sided A1 segment dominance between aneurysms and non-aneurysms there was significant difference ( t=14.198,P =0.002),the average angle of aneurysms was 174.5°,that of non-aneurysms was 113.45°. Conclusion Anterior communicating aneurysms and one-sided A1 segment dominant blood-supply has positive correlation,the reasons of different left and right anterior communicating aneurysms is development different in one-sided A1 segment dominant. Larger angle of two-side A2 segment of one-sided dominance was important factor in anterior communicating aneurysms. Discoverable artery model should had to enhance follow up.