Table 4 Target lesion characteristics pre-postprocedure guided by IVUS.

From: Real time intravascular ultrasound evaluation and stent selection for cerebral venous sinus stenosis associated with idiopathic intracranial hypertension

Variability

Preprocedure

Postprocedure

P value

Mean

Mean

Distal

Proximal

Distal

Proximal

CSA of reference segment, mm2, (mean ± SD)

38.24 ± 6.97

39.55 ± 6.56

0.287

36.40 ± 8.33

40.07 ± 8.47

37.79 ± 8.02

41.31 ± 8.47

 

Perimeter of reference segment, mm, (mean ± SD)

25.42 ± 2.46

24.92 ± 2.57

0.273

24.67 ± 3.01

26.18 ± 2.73

24.45 ± 3.08

25.39 ± 2.57

 

D derived from A1 and A2, mm, (mean ± SD) D1 D2

7.95 ± 0.65

5.99 ± 0.81

7.94 ± 0.60*

NA

CSA of stenosis, mm2 (mean ± SD)

7.42 ± 3.28

36.44 ± 8.07

< 0.001

Length of stenosis or stent, mm, (mean ± SD)

21.46 ± 12.90

48.36 ± 11.76

< 0.001

Stent expansion index

NA

0.93 ± 0.20

NA

MPG, mmHg

16.27 ± 8.71

1.30 ± 1.60

< 0.001

MDP

23.96 ± 4.71

12.25 ± 5.25

 

MPP

9.70 ± 3.28

10.93 ± 4.61

 
  1. CSA   cross-sectional area, MPG  mean pressure gradient, MDP  mean distal pressure, MPP  mean proximal pressure, A1  a circle area equal to the average value area of reference segment, A2  a inscribed circle area of reference segment, D  diameter, D1  diameter derived from A1, D2  diameter derived from A1, * mean diameter derived from minimum diameter and maximum diameter passing through the center of the most severe stenosis.
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