Ann Surg Treat Res.  2014 Oct;87(4):197-202. 10.4174/astr.2014.87.4.197.

Changes in suprarenal and infrarenal aortic angles after endovascular aneurysm repair

• Lee HK
• Chung SY
• Kim JK
• Yoo SH
• Choi SJ

• KMID: 1882825
• DOI: http://doi.org/10.4174/astr.2014.87.4.197

Abstract

PURPOSE
We investigated whether suprarenal and infrarenal aortic angles change after the endovascular aneurysm repair (EVAR) procedure and during follow-up, and investigated the correlation between infrarenal aortic angle after EVAR and type Ia endoleaks.
METHODS
Data collected on 70 EVAR procedures for a fusiform infrarenal aortic aneurysm performed between May 2006 and December 2012 were supplemented with a retrospective review of charts and radiographs.
RESULTS
The greater the preoperative infrarenal aortic angle, the greater the suprarenal aortic angle (r = 0.72, P < 0.001). The infrarenal aortic angle decreased after the EVAR procedure and continued to decrease slowly thereafter (all P < 0.001). Suprarenal aortic angle decreased immediately after the EVAR procedure and continued to decrease during the first month (P < 0.001). No differences in angulation were observed based on stent graft type. Type Ia endoleaks occurred with significantly greater incidence in patients with a larger post EVAR infrarenal angle (P = 0.037).
CONCLUSION
The infrarenal aortic angle decreased significantly immediately after the EVAR procedure and continued to decrease slowly thereafter. Suprarenal aortic angle decreased immediately after the EVAR procedure and continued to decrease during the first month. We found a correlation between infrarenal and suprarenal aortic angle. Type Ia endoleaks occurred with greater incidence in patients with a larger infrarenal angle immediately after EVAR.

Keyword

Aortic aneurysm; Endovascular procedures; Endoleak

MeSH Terms

Aneurysm*
Aortic Aneurysm
Blood Vessel Prosthesis
Endoleak
Endovascular Procedures
Follow-Up Studies
Humans
Incidence
Retrospective Studies

Figure

• 

  Fig. 1 The angle change of infrarenal (A) and suprarenal aorta (B). EAVR, endovascular aneurysm repair. a)P-values are presented to show the significance of serial change until 1 year follow-up by Friedman test. b)P-values are presented to show the significance of two consecutive periods by the Wilcoxon signed rank test.

• 

  Fig. 2 The comparison of the serial change of infrarenal aortic angle according to stent types. EAVR, endovascular aneurysm repair.

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