Review Article

Vasospasm in Cerebral Inflammation

Table 2

Medication for treatment of cerebral vasospasm: the evidence from controlled trials in humans.

InterventionType of study PathologyResults: odds ratio (OR) or relative risk (RR) for occurrence in intervention group compared to group without interventionReference

Calcium channel blockersSystematic review (SR) (six randomized controlled trials (RCTs))Acute brain injury Death: OR 0.91 [95% 0.70–1.17]
Death and severe disability OR 0.85 [95% 0.68 to 1.07]
In the subgroup of traumatic subarachnoid haemorrhage patients, pooled odds ratio was 0.59 [95% CI 0.37–0.94]; three RCTs reporting death and severe disability as an outcome in this subgroup: OR 0.67 [95% CI 0.46–0.98]
[60]

Calcium channel blockersSR (16 RCTs)Aneurysmal subarachnoid haemorrhage (aSAH)Overall, calcium antagonists reduced the risk of poor outcome: the relative risk (RR) was 0.81 [95% CI 0.72 to 0.92]; the corresponding number of patients needed to treat was 19 [95% CI 1 to 51]; for oral nimodipine alone the RR was 0.67 [95% CI 0.55 to 0.81]; for other calcium antagonists or intravenous administration of nimodipine the results were not statistically significant; calcium antagonists reduced the occurrence of secondary ischaemia and showed a favourable trend for case fatality; for magnesium, in addition to standard treatment with nimodipine, the RR was 0.75 [95% CI 0.57 to 1.00] for a poor outcome and 0.66 [95% CI 0.45 to 0.96] for clinical signs of secondary ischaemia[61]

NicardipineSR (five controlled trials)aSAHRisk of poor outcome (death, vegetative state, or dependency) OR: 0.58 (95% CI 0.37–0.9)
Mortality odds ratio: 0.45 [95% CI 0.15 to 1.29]
[62]

Magnesium sulfateProspective randomised studyEclampsiaSignificant reduction of pulsatility index () and mean flow velocity in middle cerebral artery ()[63]

Prophylactic magnesium sulfateSR of ten randomized, parallel group controlled trialsaSAHGlasgow outcome scale and modified Rankin scale RR: 0.93 (95% CI 0.82 to 1.06), mortality: 0.95 (95% CI 0.76–1.17), delayed cerebral ischaemia RR: 0.54 (95% CI 0.38 to 0.75), delayed ischemic neurological deficit (DIND): RR of 0.93 [95% CI 0.62–1.39], transcranial Doppler vasospasm: RR: 0.72 [95% CI 0.51–1.03][64]

Induced hypermagnesaemia RCTaSAHVasospasm on digital subtraction angiography OR: 0.51, [95% CI, 0.26 to 1.02], neurological recovery OR for worse outcome: 0.71 [95% CI 0.39 to 1.32][65]

StatinsSR (six RCTs)aSAHIncidence of vasospasm RR: 0.80, [95% CI: 0.54–1.17], poor neurological outcome: RR: 0.94 [95% CI, 0.77 to 1.16]
Mortality: RR: 0.30 [95% CI, 0.14–0.64]
DIND: RR: 0.58 [95% CI: 0.37–0.92]
[66]

Endothelin receptor antagonistsSR (four RCTs)aSAHIncidence of DIND: relative risk: 0.8 [95% CI 0.67–0.95], angiographic vasospasm RR 0.62, [95% CI 0.52 to 0.72], unfavourable outcome: RR: 0.87, [95% CI 0.74–1.02], mortality RR 1.05 [95% CI 0.77 to 1.45][67]

Endothelin-1A receptor antagonist ClazosentanSR (four RCTs)aSAHRelative risk for incidence of DINDs: 0.76 (95% CI 0.62–0.92), delayed cerebral infarction: 0.79 [95% CI 0.63–1.00], Glasgow outcome scale extended RR: 1.12 [95% CI 0.96–1.30], mortality RR: 1.02 [95% CI 0.70–1.49][68]

Intravenous methylprednisoloneRCTaSAHSymptomatic vasospasm 26.5% in intervention group compared with 26% in placebo group, functional outcome scale reduced in the methylprednisolone group with risk difference 19.3% [95% CI 0.5–37.9%]; outcome poor in 15% of patients in the methylprednisolone group versus 34% in the placebo group[69]

Tissue plasminogen activatorSR (five RCTs)aSAHOverall, use of intrathecal thrombolytics was associated with significant reductions in the development of poor outcomes (OR 0.52, 0.34–0.78, ), DINDs (OR 0.54, 0.34–0.87, ), and angiographic vasospasm (OR 0.32, 0.15–0.70, )[70]

Rho-kinase inhibitor SR (8 controlled trials)aSAHAbsence of symptomatic vasospasm, occurrence of low density areas associated with vasospasm on CT, and occurrence of adverse events were similar between the two groups; the clinical outcomes were more favorable in the fasudil group than in the nimodipine group ()[71]

TirilazadSR (five RCTs)aSAHThere was no significant difference between the two groups at the end of follow-up for the primary outcome, death: OR: 0.89, [95% CI 0.74 to 1.06], or in poor outcome (death, vegetative state, or severe disability) OR 1.04 [95% CI 0.90 to 1.21]; fewer patients developed delayed cerebral ischaemia in the tirilazad group than in the control group OR 0.80 [95% CI 0.69 to 0.93]; subgroup analyses did not demonstrate any significant difference in effects of tirilazad on clinical outcomes[72]

ErythropoietinRCTaSAHNo differences were demonstrated in the incidence of vasospasm and adverse events; patients receiving EPO had a decreased incidence of severe vasospasm from 27.5 to 7.5% (), reduced DIDs with new cerebral infarcts from 40.0 to 7.5% (), a shortened duration of impaired autoregulation (ipsilateral side, ), and more favorable outcome at discharge (favorable Glasgow outcome scale score, ); among the 71 survivors, the EPO group had fewer deficits measured with National Institutes of Health Stroke Scale (median score 2 versus 6, )[73]