Table 2 Radiological characteristics of the lesions

Responsible artery

 Anterior circulation

54(77.1%)

44(77.2%)

10(76.9%)

0.7300

 Posterior circulation

16(22.9%)

13(22.8%)

3(23.1%)

Stump condition

 Tapered stump

50(71.4%)

46(80.7%)

4(30.8%)

0.0011

 No stump or blunt

20(28.6%)

11(19.3%)

9(69.2%)

Occlusion length (mm) median (IQR),

8.4(7.8,9.25)

8.2(7.2,8.8)

12.8(8.5,15.5)

< 0.0001

Occlusion length

 < 10 mm

56(80%)

50(87.7%)

6(46.2%)

0.0027

 ≥ 10 mm

14(20%)

7(12.3%)

7(53.8%)

Occlusion angle°, median (IQR),

15(7.5,23.25)

14.5(7.5,22.25)

15(8.75,27.5)

0.4068

Occlusion angle°

 ≥ 45°

3(4.3%)

2(3.5%)

1(7.7%)

0.4655

 < 45°

67(95.7%)

55(96.5%)

12(92.3%)

Occlusion calcification

 Absent

66(94.3%)

55(96.5%)

11(84.6%)

0.1543

 Present

4(5.7%)

2(3.5%)

2(15.4%)

Slow antegrade flow distal to the occlusion site

 Absent

29(41.4%)

18(31.6%)

11(84.6%)

0.0005

 Present

41(58.6%)

39(68.4%)

2(15.4%)

Bridging collateral vessels

 Absent

66(94.3%)

56(98.2%)

10(76.9%)

0.0186

 Present

4(5.7%)

1(1.8%)

3(23.1%)