Table 2.
Radiological results in the three CTP map groups.
| Hypoperfusion (N = 51) | Normoperfusion (N = 12) | Hyperperfusion (N = 4) | p | |
|---|---|---|---|---|
| CBF, mL/100 g/min, mean (SD) | 26.8 (10.0) | 42.2 (15.3) | 85.9 (21.2) | <0.005 |
| CBV, mL/100 g, mean (SD) | 3.0 (0.8) | 3.1 (0.6) | 4.7 (1.0) | 0.017 |
| TTD, s, mean (SD) | 9.0 (3.4) | 5.4 (2.0) | 2.9 (0.5) | 0.001 |
| Time to CTP, min, median (IQR) | 225 (142–313) | 253 (108–489) | 264 (109–541) | 0.367 |
| Low attenuation on NCCT, n (%) | 6 (11.8) | 5 (41.7) | 3 (75) | 0.002 |
| Infarct volume on DWI, cc, median (IQR) | 0.9 (0.5–1.6) | 0.6 (0.3–1.6) | 0.9 (0.8–1.0) | 0.915 |
| GVD, s, median (IQR) | 6 (6–7) | 7 (6–7) | 6 (6–6.5) | 0.881 |
CBF: cerebral blood flow; CBV: cerebral blood volume; TTD: time to drain; CTP: computed tomography perfusion; NCCT: non-contrast computed tomography; DWI: diffusion-weighted imaging; GVD: global venous drainage; IQR: interquartile range: SD: standard deviation.