Journal of Korean Neurosurgical Society

The Korean Neurosurgical Society (대한신경외과학회)
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Morphological and Hemodynamic Parameters for Middle Cerebral Artery Bifurcation Aneurysm Rupture Risk Assessment

  • Qin, Hao (Department of Neurosurgery, Xuanwu Hospital, Capital Medical University) ;
  • Yang, Qixia (Department of Pharmacy, Zaozhuang Municipal Hospital) ;
  • Zhuang, Qiang (Department of Neurosurgery, Zaozhuang Municipal Hospital) ;
  • Long, Jianwu (Department of Neurosurgery, The 3rd Hospital of Xiamen) ;
  • Yang, Fan (Department of Neurosurgery, Xuanwu Hospital, Capital Medical University) ;
  • Zhang, Hongqi (Department of Neurosurgery, Xuanwu Hospital, Capital Medical University)
  • Received : 2017.01.20
  • Accepted : 2017.03.17
  • Published : 2017.09.01
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Abstract

Objective : To investigate the morphological and hemodynamic parameters associated with middle cerebral artery (MCA) bifurcation aneurysm rupture. Methods : A retrospective study of 67 consecutive patients was carried out based on 3D digital subtraction angiography data. Morphological and hemodynamic parameters including aneurysm size parameters (dome width, height, and perpendicular height), longest dimension from the aneurysm neck to the dome tip, neck width, aneurysm area, aspect ratio, Longest dimension from the aneurysm neck to the dome tip (Dmax) to dome width, and height-width, Bottleneck factor, as well as wall shear stress (WSS), low WSS area (LSA), percentage of LSA (LSA%) and energy loss (EL) were estimated. Parameters between ruptured and un-ruptured groups were analyzed. Receiver operating characteristics were generated to check prediction performance of all significant variables. Results : Sixty-seven patients with MCA bifurcation aneurysm were included (31 unruptured, 36 ruptured). Dmax (p=0.008) was greater in ruptured group than that in un-ruptured group. D/W (p<0.001) and the percentage of the low WSS area ($0.09{\pm}0.13$ vs. $0.01{\pm}0.03$, p<0.001) were also greater in the ruptured group. Moreover, the EL in ruptured group was higher than that in unruptured group ($6.39{\pm}5.04$ vs. $1.53{\pm}0.86$, p<0.001). Multivariate regression analysis suggested D/W and EL were significant predictors of rupture of MCA bifurcation aneurysms. Correlation analyses revealed the D/W value was positively associated with the EL (R=0.442, p<0.01). Conclusion : D/W and EL might be the most two favorable factors to predict rupture risk of MCA bifurcation aneurysms.

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References

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