Table 5.
Influence of plaque eccentricity on mechanisms of lumen enlargement
| Direct stenting (n=30) | Predilatation stenting (n=30) | |||||
| EEC | No ECC | p Value | ECC | No ECC | p Value | |
| n (%) | 22 (73) | 8 (26) | 17 (57) | 13 (43) | ||
| Proximal reference (5 mm) | ||||||
| Lumen volume (mm3) | 4.1 (3.3) | 2.8 (4.7) | 0.52 | 4.0 (6.9) | 1.0 (6.0) | 0.06 |
| EEM volume (mm3) | 0.8 (3.2 ) | 2.5 (5.9) | 0.47 | 1.4 (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) | 0.10 | 56.2 (22.6) | 41.1 (21.7) | 0.03 |
| EEM volume (mm3) | 42.5 (21.3) | 31.2 (12.4) | 0.12 | 41.4 (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) | 0.93 | 9.5 (7.5) | 4.1 (4.6) | 0.02 |
| EEM volume (mm3) | 3.2 (7.7) | 1.9 (10.3) | 0.42 | 8.8 (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) | 0.11 | 69.6 (33.8) | 47.9 (26.4) | 0.04 |
| EEM volume (mm3) | 46.5 (24.5) | 35.6 (21.8) | 0.14 | 50.4 (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 |
Values are mean (SD).
ECC/No ECC, eccentricity/no eccentricity; EEM, external elastic membrane; P+M, plaque plus media.