Table 2

Gray-scale and Virtual Histology Intravascular Ultrasound Data

VariableDefinite TCFA (+)Definite TCFA (–)p Value
Analyzed vessel, no. (%)4238
 LAD15 (36)18 (47)
 LCX12 (28)8 (21)
 RCA15 (36)12 (31)
Length of image segment, mm47.0 (35.7–71.4)41.1 (32.6–58.0)0.3
External elastic membrane volume, mm3719.0 (587.5–836.6)701.1 (609.2–787.2)0.2
Lumen volume, mm3273.0 (243.5–345.0)289.0 (223.0–346.0)0.2
Plaque plus media volume, mm3422.1 (338.9–473.7)402.2 (300.9–451.8)0.3
Fibrous tissue volume, mm3142.3 (98.6–184.2)148.4 (106.8–196.5)0.2
Fibro-fatty volume, mm328.2 (16.5–34.1)36.5 (18.3–50.0)0.1
Necrotic core volume, mm349.5 (30.0–78.6)30.5 (20.7–46.9)0.1
Dense calcium volume, mm322.0 (13.3–42.1)17.1 (6.9–29.2)0.4
Fibrous tissue, %56.3 (48.8–61.6)62.6 (51.1–70.8)0.1
Fibro-fatty, %10.8 (9.1–16.5)13.6 (9.6–17.2)0.2
Necrotic core, %21.3 (15.1–27.3)16.6 (9.0–19.2)0.01
Dense calcium, %9.7 (6.9–19.9)6.7 (3.7–14.2)0.2

Values are median (interquartile range) unless otherwise specified.

LAD = left anterior descending artery; LCX = left circumflex; RCA = right coronary artery; TCFA = thin cap fibroatheroma.