A randomized controlled trial of high-dose intravenous nicardipine in aneurysmal subarachnoid hemorrhage. A report of the Cooperative Aneurysm Study

Journal of Neurosurgery
E C HaleyJ C Torner

Abstract

Because of their action as cerebral vasodilators, dihydropyridine calcium antagonists have received intense scrutiny for their potential benefit in ameliorating the devastating consequences of delayed cerebral vasospasm following aneurysmal subarachnoid hemorrhage (SAH). From October, 1987, to September, 1989, 41 North American neurosurgical centers in the Cooperative Aneurysm Study accrued 906 patients with recent (Days 0 to 7) aneurysmal SAH into a prospective randomized double-blind placebo-controlled trial of high-dose intravenous nicardipine to test whether treatment with this agent improved overall outcome. Eligible patients received 0.15 mg/kg/hr of either nicardipine or placebo by continuous infusion for up to 14 days following hemorrhage. The 449 patients randomly assigned to the nicardipine-treated group and the 457 patients assigned to the placebo-treated group were balanced with regard to prognostic factors for ischemic deficits from vasospasm and for overall outcome. Other medical and surgical interventions were used with similar frequency in both groups, except that antihypertensive agents were used less frequently in the nicardipine-treated patients (26% of the nicardipine-treated group vs. 43% of the placebo-tre...Continue Reading

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