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(Stroke. 2009;40:1169.)
© 2009 American Heart Association, Inc.
Go Red for Women |
From the Departments of Neurology, Obstetrics, Gynecology & Reproductive Sciences, and Pharmacology, University of Vermont College of Medicine, Burlington.
Correspondence to Marilyn J. Cipolla, PhD, University of Vermont, Department of Neurology, 89 Beaumont Ave, Given C454, Burlington, VT 05405. E-mail Marilyn.Cipolla{at}uvm.edu
Background and Purpose— Magnesium sulfate is used extensively for prevention of eclamptic seizures. Empirical and clinical evidence supports the effectiveness of magnesium sulfate; however, questions remain as to its safety and mechanism. This review summarizes current evidence supporting the possible mechanisms of action and several controversies for magnesium sulfate treatment.
Summary of Review— Several mechanisms are presented, including the effects of magnesium sulfate on peripheral and cerebral vasodilation, blood-brain barrier protection, and as an anticonvulsant.
Conclusions— Though the specific mechanisms of action remain unclear, the effect of magnesium sulfate in the prevention of eclampsia is likely multi-factorial. Magnesium sulfate may act as a vasodilator, with actions in the peripheral vasculature or the cerebrovasculature, to decrease peripheral vascular resistance or relieve vasoconstriction. Additionally, magnesium sulfate may also protect the blood-brain barrier and limit cerebral edema formation, or it may act through a central anticonvulsant action.
Key Words: eclampsia magnesium sulfate vasodilation blood-brain barrier anticonvulsant
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