Association of hemodynamic factors and progressive aortic dilatation following type A aortic dissection surgical repair

Type A aortic dissection (TAAD) involves the ascending aorta or the arch. Acute TAAD usually requires urgent replacement of the ascending aorta. However, a subset of these patients develops aortic rupture due to further dilatation of the residual dissected aorta. There is currently no reliable means...

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Bibliographic Details
Published in:Scientific reports 2021-06, Vol.11 (1), p.11521-11521, Article 11521
Main Authors: Zhu, Yu, Mirsadraee, Saeed, Asimakopoulos, George, Gambaro, Alessia, Rosendahl, Ulrich, Pepper, John, Xu, Xiao Yun
Format: Article
Language:English
Subjects:
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Aneurysm
Aorta
Aortic dissection
Computed tomography
Computer applications
Coronary vessels
Dissection
Humanities and Social Sciences
Injuries
multidisciplinary
Science
Science (multidisciplinary)
Surgery
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Summary:Type A aortic dissection (TAAD) involves the ascending aorta or the arch. Acute TAAD usually requires urgent replacement of the ascending aorta. However, a subset of these patients develops aortic rupture due to further dilatation of the residual dissected aorta. There is currently no reliable means to predict the risk of dilatation following TAAD repair. In this study, we performed a comprehensive morphological and hemodynamic analysis for patients with and without progressive aortic dilatation following surgical replacement of the ascending aorta. Patient-specific models of repaired TAAD were reconstructed from post-surgery computed tomography images for detailed computational fluid dynamic analysis. Geometric and hemodynamic parameters were evaluated and compared between patients with stable aortic diameters (N = 9) and those with aortic dilatation (N = 8). Our results showed that the number of re-entry tears and true/false lumen pressure difference were significantly different between the two groups. Patients with progressive aortic dilatation had higher luminal pressure difference (6.7 [4.6, 10.9] vs. 0.9 [0.5, 2.3] mmHg; P = 0.001) and fewer re-entry tears (1.5 [1, 2.8] vs. 5 [3.3, 7.5]; P = 0.02) compared to patients with stable aortic diameters, suggesting that these factors may serve as potential predictors of aneurysmal dilatation following surgical repair of TAAD.
ISSN:2045-2322
2045-2322
DOI:10.1038/s41598-021-91079-5