Prediction of Rupture Sites in XXXX After Finite Element Analysis.

@entity1 @entity1642 @entity34311 @entity397 @entity1410 @entity1028
PURPOSE: To associate regions of highest local @entity397 risk from finite element analysis (FEA) to subsequent @entity397 sites in @entity1028 ( @entity1028 ). METHODS: This retrospective multicenter study analyzed computed tomography angiography (CTA) data from 13 asymptomatic @entity1028 @entity1 (mean age 76 years; 8 @entity1 ) experiencing @entity397 at a later point in time between 2005 and 2011. All @entity1 had CTA scans before and during the @entity397 event. FEA was performed to calculate @entity1642 ( @entity1642 ), peak wall @entity397 risk (PWRR), @entity397 risk equivalent diameters (RRED), and the intraluminal thrombus volume ( @entity34311 ). @entity1642 and PWRR locations in the prerupture state were compared with subsequent CTA @entity397 findings. Visible contrast extravasation was considered a definite (n=5) @entity397 sign, while a periaortic @entity1410 was an indefinite (n=8) sign. A statistical comparison was performed between the 13- @entity1 asymptomatic @entity1028 group before and during @entity397 and a 23- @entity1 diameter-matched asymptomatic @entity1028 control group that underwent elective surgery. RESULTS: The asymptomatic AAAs before @entity397 showed significantly higher PWRR and RRED values compared to the matched asymptomatic @entity1028 control group (median values 0.74 vs 0.52 and 77 vs 59 mm, respectively; p<0.0001 for both). No statistical differences could be found for @entity1642 and @entity34311 . Ruptured AAAs showed the highest maximum diameters, PWRR, and RRED values. In 7 of the ruptured AAAs (2 definite and 5 indefinite @entity397 signs), CTA @entity397 sites correlated with prerupture PWRR locations. CONCLUSION: The location of the PWRR in unruptured AAAs predicted future @entity397 sites in several cases. Asymptomatic @entity1028 @entity1 with high PWRR and RRED values have an increased @entity397 risk.
