Key result
High wall shear stress and strain locations match aneurysm formation sites in aneurysmal arteries.
Why the study?
Although studies have evaluated hemodynamic parameters in aneurysm formation, the reasons why aneurysms do not initiate in intracranial arteries remain unclear.
Do high hemodynamic parameters (wall shear stress and strain) correlate with the site of paraclinoid aneurysm formation?
Observational (n=58)
Do high hemodynamic parameters (wall shear stress and strain) correlate with the site of paraclinoid aneurysm formation?
High wall shear stress and strain correlate with the specific locations of paraclinoid aneurysm formation, providing insight into the mechanisms of intracranial aneurysm initiation.
Supports hemodynamic role in paraclinoid aneurysm initiation; hypothesis-generating and requires prospective validation before clinical adoption.
Numerous studies have evaluated the effects of hemodynamic parameters on aneurysm formation. However, the reasons why aneurysms do not initiate in intracranial arteries are still unclear. This study aimed to investigate the influence of hemodynamic parameters, wall shear stress (WSS) and strain, on aneurysm formation by comparing between aneurysmal and non-aneurysmal arteries. Fifty-eight patients with paraclinoid aneurysms on one side were enrolled. Based on magnetic resonance angiography, each patient's left and right internal carotid arteries (ICAs) were reconstructed. For a patient having an aneurysm on one side, the ICA with the paraclinoid aneurysm was defined as the aneurysmal artery after eliminating the aneurysm, whereas the opposite ICA without aneurysm was defined as the non-aneurysmal artery. Computational fluid dynamics and fluid-structure interaction analyses were then performed for both aneurysmal and non-aneurysmal arteries. Finally, the relationship between high hemodynamic parameters and aneurysm location was investigated. For aneurysmal arteries, high WSS and strain locations were well-matched with the aneurysm formation site. Also, considerable correlations between high WSS and strain locations were observed. However, there was no significant relationship between high hemodynamic parameters and aneurysm formation for non-aneurysmal arteries. The findings are helpful for understanding aneurysm formation mechanism and encouraging further relevant research.
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Yang et al. (2023) conducted an observational in Paraclinoid aneurysms (n=58). Aneurysmal arteries vs. Non-aneurysmal arteries was evaluated on Relationship between high hemodynamic parameters (wall shear stress and strain) and aneurysm location. High wall shear stress and strain locations matched the aneurysm formation site in aneurysmal arteries, with no significant relationship observed in contralateral non-aneurysmal arteries.
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