Table 5

Influence of plaque eccentricity on mechanisms of lumen enlargement

Direct stenting (n=30)Predilatation stenting (n=30)
EECNo ECCp ValueECCNo ECCp Value
Values are mean (SD).
ECC/No ECC, eccentricity/no eccentricity; EEM, external elastic membrane; P+M, plaque plus media.
n (%)22 (73)8 (26)17 (57)13 (43)
Proximal reference (5 mm)
Lumen volume (mm3)4.1 (3.3)2.8 (4.7)0.524.0 (6.9)1.0 (6.0)0.06
EEM volume (mm3)0.8 (3.2 )2.5 (5.9)0.471.4 (5.3)−0.5 (3.9)0.13
P+M volume (mm3)−3.2 (1.6)−0.3 (5.7)0.22−2.6 (6.6)−1.5 (4.5)0.38
Stent (13 mm)
Lumen volume (mm3)58.2 (21.2)44.2 (12.3)0.1056.2 (22.6)41.1 (21.7)0.03
EEM volume (mm3)42.5 (21.3)31.2 (12.4)0.1241.4 (17.0)30.4 (27.2)0.05
P+M volume (mm3)−12.7 (13.7)−13.0 (5.8)0.58−14.9 (12.6)−10.7 (18.2)0.76
Distal reference (5 mm)
Lumen volume (mm3)5.2 (8.2)4.9 (7.8)0.939.5 (7.5)4.1 (4.6)0.02
EEM volume (mm3)3.2 (7.7)1.9 (10.3)0.428.8 (8.9)3.5 (4.0)0.03
P+M volume (mm3)−2.0 (5.1)−3.0 (5.6)0.67−0.6 (4.4)−0.7 (2.9)0.97
Total length (23 mm)
Lumen volume (mm3)67.4 (27.6)52.0 (19.8)0.1169.6 (33.8)47.9 (26.4)0.04
EEM volume (mm3)46.5 (24.5)35.6 (21.8)0.1450.4 (18.5)31.2 (13.9)0.01
P+M volume (mm3)−17.9 (16.7)−16.3 (21.7)0.65−19.1 (14.5)−16.7 (20.3)0.71