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Morphometric predictors of posterior circulation aneurysms risk rupture
Neurological Research
|March 14, 2014
Summary
Posterior circulation intracranial aneurysms (PC IAs) have higher rupture risks. Size ratio (SR) and inflow angle are key predictors of PC IA rupture risk, aiding in clinical assessment.
Area of Science:
- Neurosurgery
- Radiology
- Medical Imaging
Background:
- Posterior circulation intracranial aneurysms (PC IAs) present higher rupture rates and worse outcomes than anterior circulation IAs.
- Morphological factors like size ratio (SR) and inflow angle are implicated in IA rupture risk.
Purpose of the Study:
- To identify angiography-based morphometric predictors for the risk of rupture in PC IAs.
- To establish quantitative measures for assessing PC IA rupture potential.
Main Methods:
- Retrospective analysis of 58 patients with PC aneurysms (27 unruptured, 31 ruptured).
- Measurement of aneurysm dome, neck, parent artery sizes, SR, dome/neck ratio, and inflow angle.
- Stepwise logistic regression and ROC curve analysis to determine predictive factors.
Main Results:
- Significant differences observed in SR (1.91 vs 2.48) and inflow angle (103.7° vs 125.2°) between unruptured and ruptured PC IAs.
- Inflow angle (OR 1.05) and SR (OR 3.53) were significant predictors of PC IA rupture.
- Optimal cut-off values: Inflow angle 113.1°, SR 1.99.
Conclusions:
- Size ratio (SR) and inflow angle are significant, quantifiable predictors of rupture risk for posterior circulation intracranial aneurysms.
- These morphometric parameters can aid in the clinical assessment and management strategies for PC IAs.
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