AI Article Synopsis

  • This study explored how abdominal aortic calcification affects the extent and blood supply during acute aortic dissection (AAD) in patients.
  • Conducted from August 2014 to May 2021, the research classified patients into three groups based on their calcification levels: no, low, and high calcification, finding that calcification influenced the prevalence of coronary heart disease and blood supply patterns.
  • The results showed that higher calcification grades were linked to a reduced extent of AAD, with significant implications for the management and prognosis of affected patients, though there were no notable differences in mid-term outcomes among the groups.

Article Abstract

Background: This study aimed to investigate the influence of abdominal aortic calcification on the distal extent, blood supply, and mid-term outcomes of acute aortic dissection (AAD).

Methods: This single-centre retrospective study was conducted from August 2014 to May 2021. The aortic calcification index was used to evaluate abdominal aortic calcification. The standardized method provided by the Society for Vascular Surgery was used to evaluate the distal extent of AAD. Patients were divided into 3 groups as per the degree of calcification: no calcification (NC), low calcification (LC), and high calcification (HC).

Results: In a cohort of 723 patients, abdominal aortic calcification was present in 424 (58.6%) patients. The prevalence of coronary heart disease increased with the degree of calcification (NC versus LC versus HC: 8.4% vs. 9.5% vs. 19.3%, P < 0.001). The aortic calcification index of the distal extent at zone 9 was higher than that of the distal extent exceeding zone 9 (P = 0.001). The proportions of the NC, LC, and HC groups with distal extents exceeding zone 9 were 65.9% vs. 56.2% vs. 37.7%, P < 0.001. In a multivariate logistics analysis, the calcification grade was a protective factor of distal extents exceeding zone 9 (P < 0.001, odds ratio [OR] = 0.592). Hypertension (P = 0.019, OR = 1.559) and D-dimer (P < 0.001, OR = 1.045) were risk factors. There was a higher proportion of branch-vessels on the abdominal aorta supplied by the true lumen in the calcification group (NC versus LC versus HC: 27.8% vs. 43.8% vs. 51.1%, P < 0.001). There were no significant differences in the mid-term outcomes among the groups.

Conclusions: Abdominal aortic calcification could limit the distal extent in patients with AAD and increase the proportion of branch-vessels on the abdominal aorta supplied by the true lumen.

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Source
http://dx.doi.org/10.1016/j.avsg.2022.05.006DOI Listing

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