Imaging metric | No. (%) of patients† |
---|---|
ASPECTS | n = 53 |
Mean score ± SD | 8.89 ± 1.86 |
Range | 1–10 |
Multiphasic CT angiography | n = 71 |
Completed upon presentation | 51 (72) |
Completed > 12 h after presentation | 6 (8) |
Not completed | 14 (20) |
Site/type of occlusion | n = 51 |
Carotid T | 1 (2) |
Carotid L | 1 (2) |
M1–MCA | 9 (18) |
M1–MCA equivalent (≥ 2 M2–MCAs) | 2 (4) |
Basilar artery (basilar tip) | 1 (2) |
No proximal-vessel occlusion | 37 (72) |
Quality of collateral circulation‡ | n = 14 |
Good | 12 (86) |
Intermediate | 2 (14) |
Poor | 0 (0) |
Vascular access‡ | n = 14 |
Suitable/feasible | 12 (86) |
Unsuitable | 2 (14) |
Note: ASPECTS = Alberta Stroke Programme Early CT Score, CT = computed tomography, M1–MCA = M1 segment of middle cerebral artery, M2–MCA = M2 segment of middle cerebral artery, SD = standard deviation.
↵* All patients presented within 24 h of symptom onset, and all were assessed by a stroke on-call physician. Radiographs were assessed by a staff radiologist at Health Sciences North if both unenhanced CT of the head and multiphasic CT angiography of the head and neck were completed within 12 h of presentation to the emergency department.
↵† Except where indicated otherwise.
↵‡ Quality of collateral circulation and feasibility of vascular access were not determined for patients with no proximal-vessel occlusion identified on CT angiography.