Table 2.
Imaging and outcome variables according to timing of recanalization.
| EVT 0-6 hours (n=72) | EVT >6 hours (n=105) | p-value | |
|---|---|---|---|
| ASPECTS, median (IQR) | 8 (6-9) | 8 (6-9) | 0.51 |
| Volume of ischemic core, median rCBF <30% mL (IQR) | 14 (1-36) | 7 (0-26) | 0.13 |
| Volume of perfusion deficit, median Tmax >6s mL (IQR) | 118 (81-167) [n=71] | 112 (64-159) [n=105] | 0.21 |
| Mismatch ratio, median (IQR) | 4.9 (3.1-10.2) [n=55] | 6.4 (2.9-17.1) [n=68] | 0.37 |
| Any ICH within 72 hours, n (%) | 24 (31%) | 32 (33%) | 0.83 |
| Symptomatic ICH† within 72 hours, n (%) | 3 (4%) | 9 (9%) | 0.37 |
| Good functional outcome*, n (%) | 28/64 (44%) | 31/99 (31%) | 0.11 |
| 90-day mRS, median (IQR) | 3 (1-4) [n=64] | 3 (2-5) [n=99] | 0.09 |
*
Good functional outcome indicates mRS of 0-2 90 days after infarct.
†
Symptomatic ICH indicates worsening of the NIHSS by 4 or more points within 24 hours of admission with associated intracranial hemorrhage identified on computed tomography detected within 72 hours.
EVT: endovascular thrombectomy, n: number of patients, ASPECTS: Alberta Stroke Program Early CT Scale, IQR: interquartile range, rCBF: regional cerebral blood flow, Tmax >6s: time to tissue maximum residue function greater than 6 seconds, ICH: intracerebral hemorrhage, and mRS: modified Rankin Scale score.