Table 6.
Influence of plaque composition on mechanisms of lumen enlargement
| Direct stenting (n=30) | Predilatation stenting (n=30) | |||||
| Soft | Mixed | Dense | Soft | Mixed | Dense | |
| n (%) | 17 (57) | 8 (26) | 5 (17) | 12 (40) | 13 (43) | 5 (17) |
| Proximal reference (5 mm) | ||||||
| Lumen volume (mm3) | 0.1 (5.5) | 4.2 (3.7) | 4.3 (2.7) | 4.0 (7.0) | 2.6 (7.7) | 5.0 (7.1) |
| EEM volume (mm3) | 4.4 (7.1) | 1.2 (4.4) | 1.6 (5.6) | −5.1 (10.0) | 0.9 (8.0) | 4.8 (7.8)† |
| P+M volume (mm3) | 4.3 (4.9) | −3.0 (4.2) | −2.7 (5.2) | −9.1 (9.9) | −1.8 (5.4) | −0.2 (4.0)† |
| Stent (13 mm) | ||||||
| Lumen volume (mm3) | 56.8 (23.2) | 49.4 (18.9) | 40.0 (10.8)* | 49.0 (26.5) | 47.3 (25.9) | 49.2 (21.6) |
| EEM volume (mm3) | 34.3 (19.3) | 34.4 (22.1) | 30.4 (10.9) | 27.3 (18.2) | 31.7 (20.2) | 38.1 (18.4)† |
| P+M volume (mm3) | −22.4 (15.2) | −14.7 (11.1) | −9.6 (7.2)* | −21.7 (16.6) | −15.6 (13.9) | −11.1 (9.2)† |
| Distal reference (5 mm) | ||||||
| Lumen volume (mm3) | 8.5 (7.3) | 3.8 (8.2) | 4.0 (7.7) | 7.5 (8.7) | 5.3 (6.2) | 6.8 (6.1) |
| EEM volume (mm3) | 4.1 (3.7) | 2.4 (9.6) | 2.5 (9.5) | 5.9 (7.7) | 5.2 (7.1) | 5.9 (6.7) |
| P+M volume (mm3) | −4.5 (7.0) | −1.4 (4.7) | −1.5 (2.1) | −1.6 (6.1) | −0.1 (2.9) | −0.9 (3.0) |
| Total length (23 mm) | ||||||
| Lumen volume (mm3) | 65.3 (28.0) | 57.4 (25.8) | 48.3 (12.3)* | 60.5 (35.9) | 55.4 (31.4) | 61.0 (28.3) |
| EEM volume (mm3) | 42.8 (23.1) | 38.3 (23.2) | 34.4 (22.7) | 28.2 (19.2) | 37.8 (21.3) | 48.8 (21.2)† |
| P+M volume (mm3) | −22.7 (12.1) | −19.1 (13.9) | −13.9 (11.9)* | −32.3 (12.7) | −17.5 (19.8) | −12.2 (8.4)† |
Values are mean (SD).
*p<0.05 v dense and soft in direct stenting group; †p<0.05 v dense and soft in predilatation stenting group.
EEM, external elastic membrane; P+M, plaque plus media.