Table 2 Baseline CTA imaging characteristics, the intraoperative conditions and stent-graft information.

From: Predicting adverse events after thoracic endovascular aortic repair for patients with type B aortic dissection

Variables

All patients (n = 172)

the non-AEs group (n = 131)

The AEs group (n = 41)

P

Baseline CTA imaging characteristics

  The aortic diameter of the proximal end of the LSA, mm

29.1 ± 2.61

29.3 ± 2.47

28.6 ± 2.97

0.198

  The aortic diameter of the tracheal bifurcation, mm

36.0 ± 6.43

35.8 ± 6.42

36.5 ± 6.49

0.529

    The aortic diameter of the tracheal

    bifurcation> 40 mm, n (%)

37 (21.5%)

23 (17.6%)

14 (34.1%)

0.042

  The ascending aortic diameter, mm

37.8 ± 3.77

38.0 ± 3.73

37.4 ± 3.92

0.458

  The descending aortic diameter, mm

34.9 ± 7.19

34.8 ± 7.06

35.4 ± 7.69

0.623

  The A/D ratio

1.1 (1.0–1.24)

1.08 (1.0–1.2)

1.2 (1.0–1.4)

 < 0.001

    The A/D ratio> 1.2, n (%)

56 (32.6%)

33 (25.2%)

23 (56.1%)

 < 0.001

  The maximum descending aortic diameter, mm

41.8 ± 8.31

41.4 ± 7.92

43.0 ± 9.46

0.336

  The diameter of the primary entry tear, mm

10.0 (5.5–15.4)

9.7 (5.2–14.0)

14 (6.7–19.5)

0.008

    The diameter of the primary entry tear> 12.8 mm, n (%)

65 (37.8%)

40 (30.5%)

25 (61.0%)

0.001

  The location of the primary entry tear (inner curvature), n (%)

134 (77.9%)

101 (77.1%)

33 (80.5%)

0.810

  The median distance from the primary entry tear to the LSA, mm

23.0 (15.0–35.85)

22.8 (15.9–34.6)

23.3 (12.6–41.2)

0.894

  None distal tear, n (%)

60 (34.9%)

34 (26.0%)

26 (63.4%)

 < 0.001

  The length of the thoracic aorta, mm

302.0 (274.3–326.5)

303.0 (275.0–322.0)

298.0 (271.0–332.0)

0.651

  The length of stent graft, mm

200.0 (160.0–226.3)

200.0 (160.0–215.0)

200.0 (180.0–265.0)

0.172

  Maximum area of the total aortic lumen, mm2

942.2 (732.8–1244.4)

938.0 (731.2–1170.3)

965.2 (744.5–1608.5)

0.449

  Maximum area of the false lumen, mm2

620.8 (424.7–916.4)

589.6 (415.5–865.6)

648.1 (524.9–1194.3)

0.034

  The FL ratio, %

30.6 (19.6–44.9)

67.4 (51.9–78.7)

76.7 (66.2–84.2)

0.002

    The FL ratio> 64%, n (%)

110 (64.0%)

74 (56.5%)

36 (87.8%)

0.001

  The branch arteries involvement, n (%)

95 (55.2%)

71 (54.2%)

24 (58.5%)

0.758

The intraoperative conditions and stent-graft information

  Acute TEVAR, n (%)

140 (81.4%)

106 (80.9%)

34 (82.9%)

0.953

  Stent graft passage (LFA), n (%)

37 (21.5%)

25 (19.1%)

12 (29.3%)

0.243

  LSA coverage, n (%)

    0%

136 (79.1%)

106 (80.9%)

30 (73.2%)

0.153

    25%

3 (1.74%)

2 (1.53%)

1 (2.44%)

    50%

23 (13.4%)

17 (13.0%)

6 (14.6%)

    75%

2 (1.16%)

0 (0.00%)

2 (4.88%)

    100%

8 (4.65%)

6 (4.58%)

2 (4.88%)

  LSA revascularization techniques

    Branched stent-graft, n (%)

36 (20.9%)

31 (23.7%)

5 (12.2%)

0.175

    Chimney technique, n (%)

41 (23.8%)

30 (22.9%)

11 (26.8%)

0.760

    Fenestration, n (%)

5 (2.91%)

3 (2.29%)

2 (4.88%)

0.594

  Bank of stent-graft, n (%)

    1

54 (31.4%)

38 (29.0%)

16 (39.0%)

0.026

    2

106 (61.6%)

87 (66.4%)

19 (46.3%)

    3

12 (6.98%)

6 (4.58%)

6 (14.6%)

  The distal covered stenting, n (%)

58 (33.7%)

40 (30.5%)

18 (43.9%)

0.164

  TSG, n (%)

127 (73.8%)

98 (74.8%)

29 (70.7%)

0.753

  Operator, n (%)

    A

61 (35.5%)

49 (37.4%)

12 (29.3%)

0.634

    B

72 (41.9%)

53 (40.5%)

19 (46.3%)

    C

39 (22.7%)

29 (22.1%)

10 (24.4%)

  Intraoperative endoleak, n (%)

19 (11.0%)

12 (9.16%)

7 (17.1%)

0.163

  1. Values are expressed as mean ± SD or n (%), SD, standard deviation.
  2. Significant values are in bold.
  3. CTA, computed tomography angiography; LSA, left subclavian artery; A/D ratio, the ratio of TL diameters between the ascending and descending aorta, measured at level of pulmonary trunk bifurcation; FL, false lumen. TEVAR; thoracic endovascular aortic repair; LFA, left femoral artery; TSG; tapered stent-graft.
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