Key result
Aortic centerline elongation is strongly inversely correlated with diameter expansion in chronic type B dissection.
Why the study?
Aortic diameter triggers surgical intervention in chronic TBAD, but the correlation between diameter growth and changes in aortic centerline length, centerline curvature, and volume was unclear.
Do changes in aortic centerline length and curvature predict aortic diameter growth in patients with chronic type B aortic dissection?
Cohort (n=35)
No
Do changes in aortic centerline length and curvature predict aortic diameter growth in patients with chronic type B aortic dissection?
In chronic type B aortic dissection, early growth in aortic centerline length and curvature inversely correlates with and strongly predicts late aortic diameter growth, offering a novel imaging biomarker for risk stratification.
Answers are grounded in this paper and cite their sources.
CL/CC growth inversely associates with diameter growth in chronic TBAD and may predict it better; hypothesis-generating and should not yet change diameter-based surveillance.
Objective: Aortic diameter is the primary metric used to trigger surgical intervention in chronic type B aortic dissection (TBAD). This study investigates the correlation between diameter growth and changes in aortic centerline length (CL), centerline curvature (CC), and aortic volume in chronic TBAD. Methods: We retrospectively collected 88 computed tomography (CT) images from 35 patients with chronic TBAD. Eighteen patients had 3 CT images for analysis (CT-1, CT-2, and CT-3), whereas the remaining 17 had 2 scans (CT-1 and CT-2). Three-dimensional geometry and aortic centerlines were reconstructed from each scan, and the mean and maximum TBAD diameters were obtained. The CL and CC from the left subclavian to celiac branch were also obtained. The relationship between the diameter growth rate versus CL/CC growth rate was investigated using linear regression analysis. Results: Between CT-1 and CT-2, the CL growth rate had an inverse correlation with the mean (R=−0.8169,P<.0001) and maximum (R=−0.8043,P<.001) diameter growth rate. The CC growth rate also had an inverse correlation with the mean (R=−0.8460,P<.001) and maximum (R=−0.8588,P<.001) diameter growth rate. Between CT-2 and CT-3, we found similar inverse correlations between diameter growth rate versus CL/CC growth rate (all |R|>0.78,P<.001). Moreover, early CL/CC growth (CT-1 and CT-2) was a stronger predictor of late diameter growth (CT-2 and CT-3) (|R|>0.72) than early diameter growth itself (|R|<0.61), indicating the centerline length/curvature may be better predictors for diameter growth of chronic TBAD. Conclusions: In chronic TBAD, the CL/CC growth has an inverse relationship with aortic diameter growth, which may be used to predict diameter of chronic TBAD.
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Liang et al. (2026) conducted a cohort in Chronic type B aortic dissection (n=35). Aortic centerline length and curvature growth was evaluated on Correlation between centerline length growth rate and mean diameter growth rate (R = -0.8169, p=<0.001). In chronic type B aortic dissection, the growth of centerline length and curvature has a strong inverse correlation with diameter growth, predicting future aortic expansion.
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