Table 3 Parameters evaluated using grayscale and virtual histology intravascular ultrasound

EEM volume index (mm³/mm)

16.45 ± 5.59

16.18 ± 4.83

0.79

16.09 ± 5.52

16.11 ± 5.02

0.98

% change

−2.1 ± 5.1

−0.5 ± 6.4

0.12

Plaque volume index (mm³/mm)

9.11 ± 3.62

8.66 ± 2.73

0.47

8.91 ± 3.37

8.58 ± 2.96

0.58

% change

−1.4 ± 8.5

−1.0 ± 10.1

0.84

Lumen volume index (mm³/mm)

7.34 ± 2.58

7.52 ± 2.66

0.71

7.17 ± 2.62

7.54 ± 2.72

0.47

% change

−1.9 ± 11.2

0.5 ± 12.5

0.28

Percent atheroma volume (%)

55.1 ± 7.2

53.6 ± 6.6

0.27

55.3 ± 6.5

53.3 ± 7.5

0.12

Nominal change (%)

0.2 ± 4.0

−0.4 ± 4.4

0.47

Fibrous volume index (mm³/mm)

3.50 ± 2.01

2.95 ± 1.44

0.11

3.17 ± 1.74

3.08 ± 1.52

0.78

Change (mm³/mm)

−0.34 ± 0.74

0.13 ± 0.84

0.002

FF volume index (mm³/mm)

1.28 ± 1.08

0.73 ± 0.57

0.002

0.77 ± 0.68

0.91 ± 0.83

0.33

Change (mm³/mm)

-0.51 ± 0.67

0.18 ± 0.53

<0.0001

NC volume index (mm³/mm)

0.56 ± 0.41

1.04 ± 0.64

<0.0001

0.99 ± 0.63

0.67 ± 0.44

0.003

Change (mm³/mm)

0.43 ± 0.40

−0.37 ± 0.39

<0.0001

DC volume index (mm³/mm)

0.35 ± 0.33

0.56 ± 0.50

0.006

0.55 ± 0.48

0.54 ± 0.54

0.92

Change (mm³/mm)

0.20 ± 0.27

−0.02 ± 0.31

<0.0001

Average length (mm)

24.7 ± 15.9

24.3 ± 13.3

0.88

24.9 ± 16.1

24.2 ± 13.1

0.81