Article Figures & Data
Figures
- fig 1.
The wide-necked basilar artery aneurysm replica.
A, At peak systole (defined as peak flow within the basilar artery), opacified fluid slipstreams enter the aneurysm sac through the distal neck (arrowhead) and impact the distal lateral aneurysm wall (arrow), the site of aneurysm rupture.
B, Flow swirls within the aneurysm sac and exits the aneurysm neck (during the next systole) peripheral to the distal central incoming jet, usually at the proximal portion of the neck. As flow is not compressible, maximal flow is during systole.
- fig 2.
Wide-necked basilar artery aneurysm after treatment with parent vessel stenting.
A, Fluid slipstreams lose coherence as they pass through the stent mesh with little if any impact against the aneurysm sidewall.
B, Flowing slipstreams generally remain within the center of the aneurysm sac and the intraaneurysmal reverse vortex flow pattern previously shown has changed to a more disturbed flow profile.
- fig 3.
Wide-necked basilar artery aneurysm after treatment with parent vessel stenting and subsequent intraaneurysmal coiling.
A, Coil placement in the distal lateral aneurysm segment results in slipstream impact against the coil mass (arrow) with little flow entering the aneurysm and with no slipstream impact against any portion of the aneurysm sidewall.
B, Coil placement in the proximal lateral aneurysm segment results in some flow entering the aneurysm; however, the stent continues to interrupt the coherence of the entering fluid slipstreams.
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