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Research ArticleNeurointervention

Hemodynamic Patterns of Anterior Communicating Artery Aneurysms: A Possible Association with Rupture

M.A. Castro, C.M. Putman, M.J. Sheridan and J.R. Cebral
American Journal of Neuroradiology February 2009, 30 (2) 297-302; DOI: https://doi.org/10.3174/ajnr.A1323
M.A. Castro
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C.M. Putman
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M.J. Sheridan
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J.R. Cebral
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    Fig 1.

    A–D, Different flow patterns found in AcomA aneurysms are shown in the top row. Pictures of the streamlines colored by the magnitude of the velocity and their path from the A1 segment to the A2 segments in 4 selected aneurysms for each flow type are shown in the bottom row.

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    Fig 2.

    Streamlines colored with the velocity magnitude (top row) and instantaneous WSS distributions (bottom row) at the peak systole for 4 selected aneurysms with different flow types (from left to right: flow types A, B, C, and D) whose MWSS is of 10, 60, 200, and 150 dyne/cm2, respectively. The same color scale of 150 dyne/cm2 is used for all the WSS images. Only flow type C aneurysm is ruptured.

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    Table 1:

    Number and percentage of ruptured and unruptured aneurysms in each flow type based on velocity magnitude maps at selected cut planes

    Flow TypeRuptured (%)Unruptured (%)Total
    I3 (75)1 (25)4
    II6 (75)2 (25)8
    III1 (100)0 (0)1
    IV8 (62)5 (38)13
    Total18 (70)8 (30)26
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    Table 2:

    Number, percentage, and average peak WSS of ruptured and unruptured aneurysms in each flow type group

    Flow TypeRupturedUnrupturedTotal
    No. (%)WSS (dyne/cm2)No. (%)WSS (dyne/cm2)
    A1 (25)7003 (75)634
    B2 (50)782 (50)604
    C13 (87)2832 (13)22515
    D2 (67)1601 (33)1503
    Total18 (70)2718 (30)11426
    • Note:—WSS indicates wall shear stress.

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American Journal of Neuroradiology: 30 (2)
American Journal of Neuroradiology
Vol. 30, Issue 2
February 2009
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M.A. Castro, C.M. Putman, M.J. Sheridan, J.R. Cebral
Hemodynamic Patterns of Anterior Communicating Artery Aneurysms: A Possible Association with Rupture
American Journal of Neuroradiology Feb 2009, 30 (2) 297-302; DOI: 10.3174/ajnr.A1323

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Hemodynamic Patterns of Anterior Communicating Artery Aneurysms: A Possible Association with Rupture
M.A. Castro, C.M. Putman, M.J. Sheridan, J.R. Cebral
American Journal of Neuroradiology Feb 2009, 30 (2) 297-302; DOI: 10.3174/ajnr.A1323
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