Table 3.
Cardiac allograft vasculopathy by intravascular ultrasound per segment analysis
| Variable | All (n = 156) | Group 1 (n = 18) | Group 2 (n = 55) | Group 3 (n = 83) | P-value |
|---|---|---|---|---|---|
| CAV by IVUS, n (%) | 106 (68.0) | 2 (11.1) | 30 (54.6) | 74 (89.2) | <0.001 |
| 1st segment (0–10 mm)a | 37 (72.6) | 1 (16.7) | 10 (55.6) | 26 (93.3) | <0.001 |
| 2nd segment (10–20 mm)a | 36 (67.9) | 1 (16.7) | 10 (52.6) | 25 (89.3) | <0.001 |
| 3rd segment (20–30 mm)a | 33 (63.5) | 0 (0.0) | 10 (55.6) | 23 (82.1) | <0.001 |
| MIT by IVUS, mm | 0.6 (0.0, 1.1) | 0.0 (0.0, 0.0) | 0.3 (0.0, 0.9) | 0.9 (0.4, 1.2) | <0.001 |
| Vessel volume index (mm3/mm) | 16.6 (13.5, 19.7) | 14.6 (13.7, 17.1) | 17.0 (14.2, 19.4) | 16.7 (13.4, 20.4) | 0.27 |
| Lumen volume index (mm3/mm) | 11.2 (8.7, 13.5) | 12.9 (11.8, 14.8) | 12.0 (10.1, 14.6) | 9.7 (6.7, 12.7) | <0.001 |
| Plaque volume index (mm3/mm) | 3.9 (2.0, 8.7) | 2.1 (1.7, 2.4) | 2.8 (1.9, 6.4) | 6.4 (3.5, 9.7) | <0.001 |
| Plaque burden, % | 25.8 (14.1, 44.4) | 12.4 (12.2, 14.3) | 18.3 (12.0, 34.0) | 37.5 (24.4, 49.1) | <0.001 |
CAV, cardiac allograft vasculopathy; IVUS, intravascular ultrasound; MIT, maximal intimal thickness.
a1st segment (0–10 mm), n = 51, 6, 18, 27; 2nd segment (10–20 mm), n = 53, 6, 19, 28; 3rd segment (20–30 mm), n = 52, 6, 18, 28 for all, group 1, group 2, and group 3, respectively.