Table 2.
The number and types of follow-up imaging studies including CTA, DSA, and MRI including MRA.
| Follow-up imaging studies | PMSAH (n = 14) | nPMSAH (n = 33) |
|---|---|---|
| aRepeat CTA | 8 | 15 |
| bRepeat DSA | 7 | 20 |
| cMRI + MRA | 3 | 11 |
| No follow-up | 23 | 3 |
PMSAH: perimesencephalic subarachnoid hemorrhage; nPMSAH: non-perimesencephalic subarachnoid hemorrhage; CTA: computed tomography angiography; DSA: digital subtraction angiography; MRI: magnetic resonance imaging; MRA: MR angiography.
a
Four of CTAs were performed for vasospasms (n = 1 with PMSAH; and n = 3 with nPMSAH).
b
Three of DSAs were performed for vasospasms (n = 2) and intra-arterial nimodipine (n = 1).
c
Two patients underwent MRI + MRA twice.