Figure 1.
3D model of PCoA aneurysm depicting morphological variables previously studied in the literature.
The aspect ratio (AR) is obtained by dividing the perpendicular height by the neck diameter. Size ratio (SR) is calculated by dividing the maximum height (Hmax) by the average composite diameter of the all vessels (ICA1v, PCoAv, ICA2v) involved with the aneurysm. Composite diameters are obtained by averaging the initial diameter of the vessel (ICA11, PCoA1, ICA21) at the aneurysm neck or branching point with the diameter of the vessel 1.5 away from the initial diameter (ICA12, PCoA2, ICA22). Aneurysm angle is defined as the angle between the vector formed by the maximum height of the aneurysm with the aneurysm neck. The vessel angle is defined as the angle between the vector of flow and the neck of the aneurysm. The flow angle is defined as the angle between the vector of flow and the vector formed by the maximum height of the aneurysm.
Figure 2.
3D model of PCoA aneurysm depicting angular variables of the surrounding vasculature.
There were three vessel-to-vessel angles measured. The ICA1 to ICA2 angle refers to the angle between the distal ICA (ICA2) and the proximal ICA (ICA1). The ICA1 to PCoA angle refers to the angle formed between the proximal ICA (ICA1) and PCoA.
Table 1.
Baseline demographic and clinical data.
Table 2.
Univariate analysis for rupture.
Table 3.
Multivariate analysis for rupture.
Table 4.
Multivariate analysis for rupture in the subgroup of aneurysms with visible PCoA.
Table 5.
Univariate analysis for intracerebral hemorrhage.
Table 6.
Multivariate analysis for intracerebral hemorrhage.